rdelaage
/
postgresql
mirror of https://git.postgresql.org/git/postgresql.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Generated columns 

This is an SQL-standard feature that allows creating columns that are
computed from expressions rather than assigned, similar to a view or
materialized view but on a column basis.

This implements one kind of generated column: stored (computed on
write).  Another kind, virtual (computed on read), is planned for the
future, and some room is left for it.

Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/b151f851-4019-bdb1-699e-ebab07d2f40a@2ndquadrant.com
This commit is contained in:
Peter Eisentraut 2019-03-30 08:13:09 +01:00
parent 6b8b5364dd
commit fc22b6623b
84 changed files with 3067 additions and 157 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
contrib/postgres_fdw/expected/postgres_fdw.out
View File

@ -6431,6 +6431,31 @@ select * from rem1;
11 | bye remote
(4 rows)
-- ===================================================================
-- test generated columns
-- ===================================================================
create table gloc1 (a int, b int);
alter table gloc1 set (autovacuum_enabled = 'false');
create foreign table grem1 (
a int,
b int generated always as (a * 2) stored)
server loopback options(table_name 'gloc1');
insert into grem1 (a) values (1), (2);
update grem1 set a = 22 where a = 2;
select * from gloc1;
a | b
----+----
1 | 2
22 | 44
(2 rows)
select * from grem1;
a | b
----+----
1 | 2
22 | 44
(2 rows)
-- ===================================================================
-- test local triggers
-- ===================================================================

3
contrib/postgres_fdw/postgres_fdw.c
View File

@ -1644,9 +1644,10 @@ postgresPlanForeignModify(PlannerInfo *root,
else if (operation == CMD_UPDATE)
{
int col;
Bitmapset *allUpdatedCols = bms_union(rte->updatedCols, rte->extraUpdatedCols);
col = -1;
while ((col = bms_next_member(rte->updatedCols, col)) >= 0)
while ((col = bms_next_member(allUpdatedCols, col)) >= 0)
{
/* bit numbers are offset by FirstLowInvalidHeapAttributeNumber */
AttrNumber attno = col + FirstLowInvalidHeapAttributeNumber;

14
contrib/postgres_fdw/sql/postgres_fdw.sql
View File

@ -1363,6 +1363,20 @@ insert into rem1(f2) values('bye remote');
select * from loc1;
select * from rem1;
-- ===================================================================
-- test generated columns
-- ===================================================================
create table gloc1 (a int, b int);
alter table gloc1 set (autovacuum_enabled = 'false');
create foreign table grem1 (
a int,
b int generated always as (a * 2) stored)
server loopback options(table_name 'gloc1');
insert into grem1 (a) values (1), (2);
update grem1 set a = 22 where a = 2;
select * from gloc1;
select * from grem1;
-- ===================================================================
-- test local triggers
-- ===================================================================

19
doc/src/sgml/catalogs.sgml
View File

@ -1129,9 +1129,11 @@
<entry><type>bool</type></entry>
<entry></entry>
<entry>
This column has a default value, in which case there will be a
corresponding entry in the <structname>pg_attrdef</structname>
catalog that actually defines the value.
This column has a default expression or generation expression, in which
case there will be a corresponding entry in the
<structname>pg_attrdef</structname> catalog that actually defines the
expression. (Check <structfield>attgenerated</structfield> to
determine whether this is a default or a generation expression.)
</entry>
</row>
@ -1159,6 +1161,17 @@
</entry>
</row>
<row>
<entry><structfield>attgenerated</structfield></entry>
<entry><type>char</type></entry>
<entry></entry>
<entry>
If a zero byte (<literal>''</literal>), then not a generated column.
Otherwise, <literal>s</literal> = stored. (Other values might be added
in the future.)
</entry>
</row>
<row>
<entry><structfield>attisdropped</structfield></entry>
<entry><type>bool</type></entry>

118
doc/src/sgml/ddl.sgml
View File

@ -233,6 +233,124 @@ CREATE TABLE products (
</para>
</sect1>
<sect1 id="ddl-generated-columns">
<title>Generated Columns</title>
<indexterm zone="ddl-generated-columns">
<primary>generated column</primary>
</indexterm>
<para>
A generated column is a special column that is always computed from other
columns. Thus, it is for columns what a view is for tables. There are two
kinds of generated columns: stored and virtual. A stored generated column
is computed when it is written (inserted or updated) and occupies storage
as if it were a normal column. A virtual generated column occupies no
storage and is computed when it is read. Thus, a virtual generated column
is similar to a view and a stored generated column is similar to a
materialized view (except that it is always updated automatically).
PostgreSQL currently implements only stored generated columns.
</para>
<para>
To create a generated column, use the <literal>GENERATED ALWAYS
AS</literal> clause in <command>CREATE TABLE</command>, for example:
<programlisting>
CREATE TABLE people (
...,
height_cm numeric,
height_in numeric <emphasis>GENERATED ALWAYS AS (height_cm * 2.54) STORED</emphasis>
);
</programlisting>
The keyword <literal>STORED</literal> must be specified to choose the
stored kind of generated column. See <xref linkend="sql-createtable"/> for
more details.
</para>
<para>
A generated column cannot be written to directly. In
<command>INSERT</command> or <command>UPDATE</command> commands, a value
cannot be specified for a generated column, but the keyword
<literal>DEFAULT</literal> may be specified.
</para>
<para>
Consider the differences between a column with a default and a generated
column. The column default is evaluated once when the row is first
inserted if no other value was provided; a generated column is updated
whenever the row changes and cannot be overridden. A column default may
not refer to other columns of the table; a generation expression would
normally do so. A column default can use volatile functions, for example
<literal>random()</literal> or functions referring to the current time;
this is not allowed for generated columns.
</para>
<para>
Several restrictions apply to the definition of generated columns and
tables involving generated columns:
<itemizedlist>
<listitem>
<para>
The generation expression can only use immutable functions and cannot
use subqueries or reference anything other than the current row in any
way.
</para>
</listitem>
<listitem>
<para>
A generation expression cannot reference another generated column.
</para>
</listitem>
<listitem>
<para>
A generation expression cannot reference a system column, except
<varname>tableoid</varname>.
</para>
</listitem>
<listitem>
<para>
A generated column cannot have a column default or an identity definition.
</para>
</listitem>
<listitem>
<para>
A generated column cannot be part of a partition key.
</para>
</listitem>
<listitem>
<para>
Foreign tables can have generated columns. See <xref
linkend="sql-createforeigntable"/> for details.
</para>
</listitem>
</itemizedlist>
</para>
<para>
Additional considerations apply to the use of generated columns.
<itemizedlist>
<listitem>
<para>
Generated columns maintain access privileges separately from their
underlying base columns. So, it is possible to arrange it so that a
particular role can read from a generated column but not from the
underlying base columns.
</para>
</listitem>
<listitem>
<para>
Generated columns are, conceptually, updated after
<literal>BEFORE</literal> triggers have run. Therefore, changes made to
base columns in a <literal>BEFORE</literal> trigger will be reflected in
generated columns. But conversely, it is not allowed to access
generated columns in <literal>BEFORE</literal> triggers.
</para>
</listitem>
</itemizedlist>
</para>
</sect1>
<sect1 id="ddl-constraints">
<title>Constraints</title>

66
doc/src/sgml/information_schema.sgml
View File

@ -952,6 +952,62 @@
</table>
</sect1>
<sect1 id="infoschema-column-column-usage">
<title><literal>column_column_usage</literal></title>
<para>
The view <literal>column_column_usage</literal> identifies all generated
columns that depend on another base column in the same table. Only tables
owned by a currently enabled role are included.
</para>
<table>
<title><literal>column_column_usage</literal> Columns</title>
<tgroup cols="3">
<thead>
<row>
<entry>Name</entry>
<entry>Data Type</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry><literal>table_catalog</literal></entry>
<entry><type>sql_identifier</type></entry>
<entry>Name of the database containing the table (always the current database)</entry>
</row>
<row>
<entry><literal>table_schema</literal></entry>
<entry><type>sql_identifier</type></entry>
<entry>Name of the schema containing the table</entry>
</row>
<row>
<entry><literal>table_name</literal></entry>
<entry><type>sql_identifier</type></entry>
<entry>Name of the table</entry>
</row>
<row>
<entry><literal>column_name</literal></entry>
<entry><type>sql_identifier</type></entry>
<entry>Name of the base column that a generated column depends on</entry>
</row>
<row>
<entry><literal>dependent_column</literal></entry>
<entry><type>sql_identifier</type></entry>
<entry>Name of the generated column</entry>
</row>
</tbody>
</tgroup>
</table>
</sect1>
<sect1 id="infoschema-column-domain-usage">
<title><literal>column_domain_usage</literal></title>
@ -1648,13 +1704,19 @@
<row>
<entry><literal>is_generated</literal></entry>
<entry><type>character_data</type></entry>
<entry>Applies to a feature not available in <productname>PostgreSQL</productname></entry>
<entry>
If the column is a generated column, then <literal>ALWAYS</literal>,
else <literal>NEVER</literal>.
</entry>
</row>
<row>
<entry><literal>generation_expression</literal></entry>
<entry><type>character_data</type></entry>
<entry>Applies to a feature not available in <productname>PostgreSQL</productname></entry>
<entry>
If the column is a generated column, then the generation expression,
else null.
</entry>
</row>
<row>

4
doc/src/sgml/protocol.sgml
View File

@ -6450,7 +6450,7 @@ Relation
</listitem>
</varlistentry>
</variablelist>
Next, the following message part appears for each column:
Next, the following message part appears for each column (except generated columns):
<variablelist>
<varlistentry>
<term>
@ -6875,7 +6875,7 @@ TupleData
</listitem>
</varlistentry>
</variablelist>
Next, one of the following submessages appears for each column:
Next, one of the following submessages appears for each column (except generated columns):
<variablelist>
<varlistentry>
<term>

3
doc/src/sgml/ref/copy.sgml
View File

@ -103,7 +103,8 @@ COPY { <replaceable class="parameter">table_name</replaceable> [ ( <replaceable
<listitem>
<para>
An optional list of columns to be copied. If no column list is
specified, all columns of the table will be copied.
specified, all columns of the table except generated columns will be
copied.
</para>
</listitem>
</varlistentry>

27
doc/src/sgml/ref/create_foreign_table.sgml
View File

@ -42,7 +42,8 @@ CREATE FOREIGN TABLE [ IF NOT EXISTS ] <replaceable class="parameter">table_name
{ NOT NULL |
NULL |
CHECK ( <replaceable class="parameter">expression</replaceable> ) [ NO INHERIT ] |
DEFAULT <replaceable>default_expr</replaceable> }
DEFAULT <replaceable>default_expr</replaceable> |
GENERATED ALWAYS AS ( <replaceable>generation_expr</replaceable> ) STORED }
<phrase>and <replaceable class="parameter">table_constraint</replaceable> is:</phrase>
@ -258,6 +259,30 @@ CHECK ( <replaceable class="parameter">expression</replaceable> ) [ NO INHERIT ]
</listitem>
</varlistentry>
<varlistentry>
<term><literal>GENERATED ALWAYS AS ( <replaceable>generation_expr</replaceable> ) STORED</literal><indexterm><primary>generated column</primary></indexterm></term>
<listitem>
<para>
This clause creates the column as a <firstterm>generated
column</firstterm>. The column cannot be written to, and when read it
will be computed from the specified expression.
</para>
<para>
The keyword <literal>STORED</literal> is required to signify that the
column will be computed on write. (The computed value will be presented
to the foreign-data wrapper for storage and must be returned on
reading.)
</para>
<para>
The generation expression can refer to other columns in the table, but
not other generated columns. Any functions and operators used must be
immutable. References to other tables are not allowed.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">server_name</replaceable></term>
<listitem>

45
doc/src/sgml/ref/create_table.sgml
View File

@ -62,6 +62,7 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXI
NULL |
CHECK ( <replaceable class="parameter">expression</replaceable> ) [ NO INHERIT ] |
DEFAULT <replaceable>default_expr</replaceable> |
GENERATED ALWAYS AS ( <replaceable>generation_expr</replaceable> ) STORED |
GENERATED { ALWAYS | BY DEFAULT } AS IDENTITY [ ( <replaceable>sequence_options</replaceable> ) ] |
UNIQUE <replaceable class="parameter">index_parameters</replaceable> |
PRIMARY KEY <replaceable class="parameter">index_parameters</replaceable> |
@ -83,7 +84,7 @@ class="parameter">referential_action</replaceable> ] [ ON UPDATE <replaceable cl
<phrase>and <replaceable class="parameter">like_option</replaceable> is:</phrase>
{ INCLUDING | EXCLUDING } { COMMENTS | CONSTRAINTS | DEFAULTS | IDENTITY | INDEXES | STATISTICS | STORAGE | ALL }
{ INCLUDING | EXCLUDING } { COMMENTS | CONSTRAINTS | DEFAULTS | GENERATED | IDENTITY | INDEXES | STATISTICS | STORAGE | ALL }
<phrase>and <replaceable class="parameter">partition_bound_spec</replaceable> is:</phrase>
@ -627,6 +628,16 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
</listitem>
</varlistentry>
<varlistentry>
<term><literal>INCLUDING GENERATED</literal></term>
<listitem>
<para>
Any generation expressions of copied column definitions will be
copied. By default, new columns will be regular base columns.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>INCLUDING IDENTITY</literal></term>
<listitem>
@ -797,6 +808,28 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
</listitem>
</varlistentry>
<varlistentry>
<term><literal>GENERATED ALWAYS AS ( <replaceable>generation_expr</replaceable> ) STORED</literal><indexterm><primary>generated column</primary></indexterm></term>
<listitem>
<para>
This clause creates the column as a <firstterm>generated
column</firstterm>. The column cannot be written to, and when read it
will be computed from the specified expression.
</para>
<para>
The keyword <literal>STORED</literal> is required to signify that the
column will be computed on write and will be stored on disk. default.
</para>
<para>
The generation expression can refer to other columns in the table, but
not other generated columns. Any functions and operators used must be
immutable. References to other tables are not allowed.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>GENERATED { ALWAYS | BY DEFAULT } AS IDENTITY [ ( <replaceable>sequence_options</replaceable> ) ]</literal></term>
<listitem>
@ -2028,6 +2061,16 @@ CREATE TABLE cities_partdef
</para>
</refsect2>
<refsect2>
<title>Generated Columns</title>
<para>
The option <literal>STORED</literal> is not standard but is also used by
other SQL implementations. The SQL standard does not specify the storage
of generated columns.
</para>
</refsect2>
<refsect2>
<title><literal>LIKE</literal> Clause</title>

4
doc/src/sgml/ref/create_trigger.sgml
View File

@ -261,7 +261,9 @@ CREATE [ CONSTRAINT ] TRIGGER <replaceable class="parameter">name</replaceable>
UPDATE OF <replaceable>column_name1</replaceable> [, <replaceable>column_name2</replaceable> ... ]
</synopsis>
The trigger will only fire if at least one of the listed columns
is mentioned as a target of the <command>UPDATE</command> command.
is mentioned as a target of the <command>UPDATE</command> command
or if one of the listed columns is a generated column that depends on a
column that is the target of the <command>UPDATE</command>.
</para>
<para>

26
doc/src/sgml/textsearch.sgml
View File

@ -620,15 +620,17 @@ CREATE INDEX pgweb_idx ON pgweb USING GIN (to_tsvector('english', title || ' ' |
<para>
Another approach is to create a separate <type>tsvector</type> column
to hold the output of <function>to_tsvector</function>. This example is a
to hold the output of <function>to_tsvector</function>. To keep this
column automatically up to date with its source data, use a stored
generated column. This example is a
concatenation of <literal>title</literal> and <literal>body</literal>,
using <function>coalesce</function> to ensure that one field will still be
indexed when the other is <literal>NULL</literal>:
<programlisting>
ALTER TABLE pgweb ADD COLUMN textsearchable_index_col tsvector;
UPDATE pgweb SET textsearchable_index_col =
to_tsvector('english', coalesce(title,'') || ' ' || coalesce(body,''));
ALTER TABLE pgweb
ADD COLUMN textsearchable_index_col tsvector
GENERATED ALWAYS AS (to_tsvector('english', coalesce(title, '') || ' ' || coalesce(body, ''))) STORED;
</programlisting>
Then we create a <acronym>GIN</acronym> index to speed up the search:
@ -648,14 +650,6 @@ LIMIT 10;
</programlisting>
</para>
<para>
When using a separate column to store the <type>tsvector</type>
representation,
it is necessary to create a trigger to keep the <type>tsvector</type>
column current anytime <literal>title</literal> or <literal>body</literal> changes.
<xref linkend="textsearch-update-triggers"/> explains how to do that.
</para>
<para>
One advantage of the separate-column approach over an expression index
is that it is not necessary to explicitly specify the text search
@ -1857,6 +1851,14 @@ SELECT ts_rewrite('a &amp; b'::tsquery,
<secondary>for updating a derived tsvector column</secondary>
</indexterm>
<note>
<para>
The method described in this section has been obsoleted by the use of
stored generated columns, as described in <xref
linkend="textsearch-tables-index"/>.
</para>
</note>
<para>
When using a separate column to store the <type>tsvector</type> representation
of your documents, it is necessary to create a trigger to update the

18
doc/src/sgml/trigger.sgml
View File

@ -243,6 +243,24 @@
operation, and so they can return <symbol>NULL</symbol>.
</para>
<para>
Some considerations apply for generated
columns.<indexterm><primary>generated column</primary><secondary>in
triggers</secondary></indexterm> Stored generated columns are computed after
<literal>BEFORE</literal> triggers and before <literal>AFTER</literal>
triggers. Therefore, the generated value can be inspected in
<literal>AFTER</literal> triggers. In <literal>BEFORE</literal> triggers,
the <literal>OLD</literal> row contains the old generated value, as one
would expect, but the <literal>NEW</literal> row does not yet contain the
new generated value and should not be accessed. In the C language
interface, the content of the column is undefined at this point; a
higher-level programming language should prevent access to a stored
generated column in the <literal>NEW</literal> row in a
<literal>BEFORE</literal> trigger. Changes to the value of a generated
column in a <literal>BEFORE</literal> trigger are ignored and will be
overwritten.
</para>
<para>
If more than one trigger is defined for the same event on the same
relation, the triggers will be fired in alphabetical order by

11
src/backend/access/common/tupdesc.c
View File

@ -131,6 +131,7 @@ CreateTupleDescCopy(TupleDesc tupdesc)
att->atthasdef = false;
att->atthasmissing = false;
att->attidentity = '\0';
att->attgenerated = '\0';
}
/* We can copy the tuple type identification, too */
@ -165,6 +166,7 @@ CreateTupleDescCopyConstr(TupleDesc tupdesc)
TupleConstr *cpy = (TupleConstr *) palloc0(sizeof(TupleConstr));
cpy->has_not_null = constr->has_not_null;
cpy->has_generated_stored = constr->has_generated_stored;
if ((cpy->num_defval = constr->num_defval) > 0)
{
@ -247,6 +249,7 @@ TupleDescCopy(TupleDesc dst, TupleDesc src)
att->atthasdef = false;
att->atthasmissing = false;
att->attidentity = '\0';
att->attgenerated = '\0';
}
dst->constr = NULL;
@ -300,6 +303,7 @@ TupleDescCopyEntry(TupleDesc dst, AttrNumber dstAttno,
dstAtt->atthasdef = false;
dstAtt->atthasmissing = false;
dstAtt->attidentity = '\0';
dstAtt->attgenerated = '\0';
}
/*
@ -456,6 +460,8 @@ equalTupleDescs(TupleDesc tupdesc1, TupleDesc tupdesc2)
return false;
if (attr1->attidentity != attr2->attidentity)
return false;
if (attr1->attgenerated != attr2->attgenerated)
return false;
if (attr1->attisdropped != attr2->attisdropped)
return false;
if (attr1->attislocal != attr2->attislocal)
@ -476,6 +482,8 @@ equalTupleDescs(TupleDesc tupdesc1, TupleDesc tupdesc2)
return false;
if (constr1->has_not_null != constr2->has_not_null)
return false;
if (constr1->has_generated_stored != constr2->has_generated_stored)
return false;
n = constr1->num_defval;
if (n != (int) constr2->num_defval)
return false;
@ -638,6 +646,7 @@ TupleDescInitEntry(TupleDesc desc,
att->atthasdef = false;
att->atthasmissing = false;
att->attidentity = '\0';
att->attgenerated = '\0';
att->attisdropped = false;
att->attislocal = true;
att->attinhcount = 0;
@ -697,6 +706,7 @@ TupleDescInitBuiltinEntry(TupleDesc desc,
att->atthasdef = false;
att->atthasmissing = false;
att->attidentity = '\0';
att->attgenerated = '\0';
att->attisdropped = false;
att->attislocal = true;
att->attinhcount = 0;
@ -853,6 +863,7 @@ BuildDescForRelation(List *schema)
TupleConstr *constr = (TupleConstr *) palloc0(sizeof(TupleConstr));
constr->has_not_null = true;
constr->has_generated_stored = false;
constr->defval = NULL;
constr->missing = NULL;
constr->num_defval = 0;

108
src/backend/catalog/heap.c
View File

@ -71,6 +71,7 @@
#include "parser/parse_collate.h"
#include "parser/parse_expr.h"
#include "parser/parse_relation.h"
#include "parser/parsetree.h"
#include "partitioning/partdesc.h"
#include "storage/lmgr.h"
#include "storage/predicate.h"
@ -718,6 +719,7 @@ InsertPgAttributeTuple(Relation pg_attribute_rel,
values[Anum_pg_attribute_atthasdef - 1] = BoolGetDatum(new_attribute->atthasdef);
values[Anum_pg_attribute_atthasmissing - 1] = BoolGetDatum(new_attribute->atthasmissing);
values[Anum_pg_attribute_attidentity - 1] = CharGetDatum(new_attribute->attidentity);
values[Anum_pg_attribute_attgenerated - 1] = CharGetDatum(new_attribute->attgenerated);
values[Anum_pg_attribute_attisdropped - 1] = BoolGetDatum(new_attribute->attisdropped);
values[Anum_pg_attribute_attislocal - 1] = BoolGetDatum(new_attribute->attislocal);
values[Anum_pg_attribute_attinhcount - 1] = Int32GetDatum(new_attribute->attinhcount);
@ -1631,6 +1633,9 @@ RemoveAttributeById(Oid relid, AttrNumber attnum)
/* We don't want to keep stats for it anymore */
attStruct->attstattarget = 0;
/* Unset this so no one tries to look up the generation expression */
attStruct->attgenerated = '\0';
/*
* Change the column name to something that isn't likely to conflict
*/
@ -2130,6 +2135,7 @@ StoreAttrDefault(Relation rel, AttrNumber attnum,
Relation attrrel;
HeapTuple atttup;
Form_pg_attribute attStruct;
char attgenerated;
Oid attrdefOid;
ObjectAddress colobject,
defobject;
@ -2177,6 +2183,7 @@ StoreAttrDefault(Relation rel, AttrNumber attnum,
elog(ERROR, "cache lookup failed for attribute %d of relation %u",
attnum, RelationGetRelid(rel));
attStruct = (Form_pg_attribute) GETSTRUCT(atttup);
attgenerated = attStruct->attgenerated;
if (!attStruct->atthasdef)
{
Form_pg_attribute defAttStruct;
@ -2197,7 +2204,7 @@ StoreAttrDefault(Relation rel, AttrNumber attnum,
valuesAtt[Anum_pg_attribute_atthasdef - 1] = true;
replacesAtt[Anum_pg_attribute_atthasdef - 1] = true;
if (add_column_mode)
if (add_column_mode && !attgenerated)
{
expr2 = expression_planner(expr2);
estate = CreateExecutorState();
@ -2259,7 +2266,26 @@ StoreAttrDefault(Relation rel, AttrNumber attnum,
/*
* Record dependencies on objects used in the expression, too.
*/
recordDependencyOnExpr(&defobject, expr, NIL, DEPENDENCY_NORMAL);
if (attgenerated)
{
/*
* Generated column: Dropping anything that the generation expression
* refers to automatically drops the generated column.
*/
recordDependencyOnSingleRelExpr(&colobject, expr, RelationGetRelid(rel),
DEPENDENCY_AUTO,
DEPENDENCY_AUTO, false);
}
else
{
/*
* Normal default: Dropping anything that the default refers to
* requires CASCADE and drops the default only.
*/
recordDependencyOnSingleRelExpr(&defobject, expr, RelationGetRelid(rel),
DEPENDENCY_NORMAL,
DEPENDENCY_NORMAL, false);
}
/*
* Post creation hook for attribute defaults.
@ -2517,12 +2543,14 @@ AddRelationNewConstraints(Relation rel,
expr = cookDefault(pstate, colDef->raw_default,
atp->atttypid, atp->atttypmod,
NameStr(atp->attname));
NameStr(atp->attname),
atp->attgenerated);
/*
* If the expression is just a NULL constant, we do not bother to make
* an explicit pg_attrdef entry, since the default behavior is
* equivalent.
* equivalent. This applies to column defaults, but not for generation
* expressions.
*
* Note a nonobvious property of this test: if the column is of a
* domain type, what we'll get is not a bare null Const but a
@ -2531,7 +2559,9 @@ AddRelationNewConstraints(Relation rel,
* override any default that the domain might have.
*/
if (expr == NULL ||
(IsA(expr, Const) &&((Const *) expr)->constisnull))
(!colDef->generated &&
IsA(expr, Const) &&
castNode(Const, expr)->constisnull))
continue;
/* If the DEFAULT is volatile we cannot use a missing value */
@ -2888,6 +2918,46 @@ SetRelationNumChecks(Relation rel, int numchecks)
table_close(relrel, RowExclusiveLock);
}
/*
* Check for references to generated columns
*/
static bool
check_nested_generated_walker(Node *node, void *context)
{
ParseState *pstate = context;
if (node == NULL)
return false;
else if (IsA(node, Var))
{
Var *var = (Var *) node;
Oid relid;
AttrNumber attnum;
relid = rt_fetch(var->varno, pstate->p_rtable)->relid;
attnum = var->varattno;
if (OidIsValid(relid) && AttributeNumberIsValid(attnum) && get_attgenerated(relid, attnum))
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("cannot use generated column \"%s\" in column generation expression",
get_attname(relid, attnum, false)),
errdetail("A generated column cannot reference another generated column."),
parser_errposition(pstate, var->location)));
return false;
}
else
return expression_tree_walker(node, check_nested_generated_walker,
(void *) context);
}
static void
check_nested_generated(ParseState *pstate, Node *node)
{
check_nested_generated_walker(node, pstate);
}
/*
* Take a raw default and convert it to a cooked format ready for
* storage.
@ -2905,7 +2975,8 @@ cookDefault(ParseState *pstate,
Node *raw_default,
Oid atttypid,
int32 atttypmod,
const char *attname)
const char *attname,
char attgenerated)
{
Node *expr;
@ -2914,14 +2985,25 @@ cookDefault(ParseState *pstate,
/*
* Transform raw parsetree to executable expression.
*/
expr = transformExpr(pstate, raw_default, EXPR_KIND_COLUMN_DEFAULT);
expr = transformExpr(pstate, raw_default, attgenerated ? EXPR_KIND_GENERATED_COLUMN : EXPR_KIND_COLUMN_DEFAULT);
/*
* transformExpr() should have already rejected column references,
* subqueries, aggregates, window functions, and SRFs, based on the
* EXPR_KIND_ for a default expression.
*/
Assert(!contain_var_clause(expr));
if (attgenerated)
{
check_nested_generated(pstate, expr);
if (contain_mutable_functions(expr))
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("generation expression is not immutable")));
}
else
{
/*
* For a default expression, transformExpr() should have rejected
* column references.
*/
Assert(!contain_var_clause(expr));
}
/*
* Coerce the expression to the correct type and typmod, if given. This

30
src/backend/catalog/information_schema.sql
View File

@ -509,7 +509,29 @@ GRANT SELECT ON collation_character_set_applicability TO PUBLIC;
* COLUMN_COLUMN_USAGE view
*/
-- feature not supported
CREATE VIEW column_column_usage AS
SELECT CAST(current_database() AS sql_identifier) AS table_catalog,
CAST(n.nspname AS sql_identifier) AS table_schema,
CAST(c.relname AS sql_identifier) AS table_name,
CAST(ac.attname AS sql_identifier) AS column_name,
CAST(ad.attname AS sql_identifier) AS dependent_column
FROM pg_namespace n, pg_class c, pg_depend d,
pg_attribute ac, pg_attribute ad
WHERE n.oid = c.relnamespace
AND c.oid = ac.attrelid
AND c.oid = ad.attrelid
AND d.classid = 'pg_catalog.pg_class'::regclass
AND d.refclassid = 'pg_catalog.pg_class'::regclass
AND d.objid = d.refobjid
AND c.oid = d.objid
AND d.objsubid = ad.attnum
AND d.refobjsubid = ac.attnum
AND ad.attgenerated <> ''
AND pg_has_role(c.relowner, 'USAGE');
GRANT SELECT ON column_column_usage TO PUBLIC;
/*
@ -656,7 +678,7 @@ CREATE VIEW columns AS
CAST(c.relname AS sql_identifier) AS table_name,
CAST(a.attname AS sql_identifier) AS column_name,
CAST(a.attnum AS cardinal_number) AS ordinal_position,
CAST(pg_get_expr(ad.adbin, ad.adrelid) AS character_data) AS column_default,
CAST(CASE WHEN a.attgenerated = '' THEN pg_get_expr(ad.adbin, ad.adrelid) END AS character_data) AS column_default,
CAST(CASE WHEN a.attnotnull OR (t.typtype = 'd' AND t.typnotnull) THEN 'NO' ELSE 'YES' END
AS yes_or_no)
AS is_nullable,
@ -745,8 +767,8 @@ CREATE VIEW columns AS
CAST(seq.seqmin AS character_data) AS identity_minimum,
CAST(CASE WHEN seq.seqcycle THEN 'YES' ELSE 'NO' END AS yes_or_no) AS identity_cycle,
CAST('NEVER' AS character_data) AS is_generated,
CAST(null AS character_data) AS generation_expression,
CAST(CASE WHEN a.attgenerated <> '' THEN 'ALWAYS' ELSE 'NEVER' END AS character_data) AS is_generated,
CAST(CASE WHEN a.attgenerated <> '' THEN pg_get_expr(ad.adbin, ad.adrelid) END AS character_data) AS generation_expression,
CAST(CASE WHEN c.relkind IN ('r', 'p') OR
(c.relkind IN ('v', 'f') AND

31
src/backend/commands/copy.c
View File

@ -32,6 +32,7 @@
#include "commands/trigger.h"
#include "executor/execPartition.h"
#include "executor/executor.h"
#include "executor/nodeModifyTable.h"
#include "executor/tuptable.h"
#include "foreign/fdwapi.h"
#include "libpq/libpq.h"
@ -2922,6 +2923,21 @@ CopyFrom(CopyState cstate)
}
else
{
/*
* Compute stored generated columns
*
* Switch memory context so that the new tuple is in the same
* context as the old one.
*/
if (resultRelInfo->ri_RelationDesc->rd_att->constr &&
resultRelInfo->ri_RelationDesc->rd_att->constr->has_generated_stored)
{
ExecComputeStoredGenerated(estate, slot);
MemoryContextSwitchTo(batchcontext);
tuple = ExecCopySlotHeapTuple(slot);
MemoryContextSwitchTo(oldcontext);
}
/*
* If the target is a plain table, check the constraints of
* the tuple.
@ -3271,7 +3287,7 @@ BeginCopyFrom(ParseState *pstate,
fmgr_info(in_func_oid, &in_functions[attnum - 1]);
/* Get default info if needed */
if (!list_member_int(cstate->attnumlist, attnum))
if (!list_member_int(cstate->attnumlist, attnum) && !att->attgenerated)
{
/* attribute is NOT to be copied from input */
/* use default value if one exists */
@ -4876,6 +4892,11 @@ CopyAttributeOutCSV(CopyState cstate, char *string,
* or NIL if there was none (in which case we want all the non-dropped
* columns).
*
* We don't include generated columns in the generated full list and we don't
* allow them to be specified explicitly. They don't make sense for COPY
* FROM, but we could possibly allow them for COPY TO. But this way it's at
* least ensured that whatever we copy out can be copied back in.
*
* rel can be NULL ... it's only used for error reports.
*/
static List *
@ -4893,6 +4914,8 @@ CopyGetAttnums(TupleDesc tupDesc, Relation rel, List *attnamelist)
{
if (TupleDescAttr(tupDesc, i)->attisdropped)
continue;
if (TupleDescAttr(tupDesc, i)->attgenerated)
continue;
attnums = lappend_int(attnums, i + 1);
}
}
@ -4917,6 +4940,12 @@ CopyGetAttnums(TupleDesc tupDesc, Relation rel, List *attnamelist)
continue;
if (namestrcmp(&(att->attname), name) == 0)
{
if (att->attgenerated)
ereport(ERROR,
(errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
errmsg("column \"%s\" is a generated column",
name),
errdetail("Generated columns cannot be used in COPY.")));
attnum = att->attnum;
break;
}

167
src/backend/commands/tablecmds.c
View File

@ -760,6 +760,7 @@ DefineRelation(CreateStmt *stmt, char relkind, Oid ownerId,
rawEnt->attnum = attnum;
rawEnt->raw_default = colDef->raw_default;
rawEnt->missingMode = false;
rawEnt->generated = colDef->generated;
rawDefaults = lappend(rawDefaults, rawEnt);
attr->atthasdef = true;
}
@ -783,6 +784,9 @@ DefineRelation(CreateStmt *stmt, char relkind, Oid ownerId,
if (colDef->identity)
attr->attidentity = colDef->identity;
if (colDef->generated)
attr->attgenerated = colDef->generated;
}
/*
@ -863,6 +867,27 @@ DefineRelation(CreateStmt *stmt, char relkind, Oid ownerId,
*/
rel = relation_open(relationId, AccessExclusiveLock);
/*
* Now add any newly specified column default and generation expressions
* to the new relation. These are passed to us in the form of raw
* parsetrees; we need to transform them to executable expression trees
* before they can be added. The most convenient way to do that is to
* apply the parser's transformExpr routine, but transformExpr doesn't
* work unless we have a pre-existing relation. So, the transformation has
* to be postponed to this final step of CREATE TABLE.
*
* This needs to be before processing the partitioning clauses because
* those could refer to generated columns.
*/
if (rawDefaults)
AddRelationNewConstraints(rel, rawDefaults, NIL,
true, true, false, queryString);
/*
* Make column generation expressions visible for use by partitioning.
*/
CommandCounterIncrement();
/* Process and store partition bound, if any. */
if (stmt->partbound)
{
@ -1064,16 +1089,12 @@ DefineRelation(CreateStmt *stmt, char relkind, Oid ownerId,
}
/*
* Now add any newly specified column default values and CHECK constraints
* to the new relation. These are passed to us in the form of raw
* parsetrees; we need to transform them to executable expression trees
* before they can be added. The most convenient way to do that is to
* apply the parser's transformExpr routine, but transformExpr doesn't
* work unless we have a pre-existing relation. So, the transformation has
* to be postponed to this final step of CREATE TABLE.
* Now add any newly specified CHECK constraints to the new relation.
* Same as for defaults above, but these need to come after partitioning
* is set up.
*/
if (rawDefaults || stmt->constraints)
AddRelationNewConstraints(rel, rawDefaults, stmt->constraints,
if (stmt->constraints)
AddRelationNewConstraints(rel, NIL, stmt->constraints,
true, true, false, queryString);
ObjectAddressSet(address, RelationRelationId, relationId);
@ -2252,6 +2273,13 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
def->is_not_null |= attribute->attnotnull;
/* Default and other constraints are handled below */
newattno[parent_attno - 1] = exist_attno;
/* Check for GENERATED conflicts */
if (def->generated != attribute->attgenerated)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("inherited column \"%s\" has a generation conflict",
attributeName)));
}
else
{
@ -2269,6 +2297,7 @@ MergeAttributes(List *schema, List *supers, char relpersistence,
def->storage = attribute->attstorage;
def->raw_default = NULL;
def->cooked_default = NULL;
def->generated = attribute->attgenerated;
def->collClause = NULL;
def->collOid = attribute->attcollation;
def->constraints = NIL;
@ -5613,6 +5642,7 @@ ATExecAddColumn(List **wqueue, AlteredTableInfo *tab, Relation rel,
attribute.atthasdef = false;
attribute.atthasmissing = false;
attribute.attidentity = colDef->identity;
attribute.attgenerated = colDef->generated;
attribute.attisdropped = false;
attribute.attislocal = colDef->is_local;
attribute.attinhcount = colDef->inhcount;
@ -5658,7 +5688,9 @@ ATExecAddColumn(List **wqueue, AlteredTableInfo *tab, Relation rel,
* DEFAULT value outside of the heap. This may be disabled inside
* AddRelationNewConstraints if the optimization cannot be applied.
*/
rawEnt->missingMode = true;
rawEnt->missingMode = (!colDef->generated);
rawEnt->generated = colDef->generated;
/*
* This function is intended for CREATE TABLE, so it processes a
@ -6239,6 +6271,12 @@ ATExecColumnDefault(Relation rel, const char *colName,
colName, RelationGetRelationName(rel)),
newDefault ? 0 : errhint("Use ALTER TABLE ... ALTER COLUMN ... DROP IDENTITY instead.")));
if (TupleDescAttr(tupdesc, attnum - 1)->attgenerated)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("column \"%s\" of relation \"%s\" is a generated column",
colName, RelationGetRelationName(rel))));
/*
* Remove any old default for the column. We use RESTRICT here for
* safety, but at present we do not expect anything to depend on the
@ -6260,6 +6298,7 @@ ATExecColumnDefault(Relation rel, const char *colName,
rawEnt->attnum = attnum;
rawEnt->raw_default = newDefault;
rawEnt->missingMode = false;
rawEnt->generated = '\0';
/*
* This function is intended for CREATE TABLE, so it processes a
@ -7560,6 +7599,32 @@ ATAddForeignKeyConstraint(List **wqueue, AlteredTableInfo *tab, Relation rel,
*/
checkFkeyPermissions(pkrel, pkattnum, numpks);
/*
* Check some things for generated columns.
*/
for (i = 0; i < numfks; i++)
{
char attgenerated = TupleDescAttr(RelationGetDescr(rel), fkattnum[i] - 1)->attgenerated;
if (attgenerated)
{
/*
* Check restrictions on UPDATE/DELETE actions, per SQL standard
*/
if (fkconstraint->fk_upd_action == FKCONSTR_ACTION_SETNULL ||
fkconstraint->fk_upd_action == FKCONSTR_ACTION_SETDEFAULT ||
fkconstraint->fk_upd_action == FKCONSTR_ACTION_CASCADE)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid ON UPDATE action for foreign key constraint containing generated column")));
if (fkconstraint->fk_del_action == FKCONSTR_ACTION_SETNULL ||
fkconstraint->fk_del_action == FKCONSTR_ACTION_SETDEFAULT)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("invalid ON DELETE action for foreign key constraint containing generated column")));
}
}
/*
* Look up the equality operators to use in the constraint.
*
@ -9951,10 +10016,18 @@ ATExecAlterColumnType(AlteredTableInfo *tab, Relation rel,
COERCE_IMPLICIT_CAST,
-1);
if (defaultexpr == NULL)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("default for column \"%s\" cannot be cast automatically to type %s",
colName, format_type_be(targettype))));
{
if (attTup->attgenerated)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("generation expression for column \"%s\" cannot be cast automatically to type %s",
colName, format_type_be(targettype))));
else
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("default for column \"%s\" cannot be cast automatically to type %s",
colName, format_type_be(targettype))));
}
}
else
defaultexpr = NULL;
@ -10030,6 +10103,21 @@ ATExecAlterColumnType(AlteredTableInfo *tab, Relation rel,
*/
Assert(foundObject.objectSubId == 0);
}
else if (relKind == RELKIND_RELATION &&
foundObject.objectSubId != 0 &&
get_attgenerated(foundObject.objectId, foundObject.objectSubId))
{
/*
* Changing the type of a column that is used by a
* generated column is not allowed by SQL standard.
* It might be doable with some thinking and effort.
*/
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("cannot alter type of a column used by a generated column"),
errdetail("Column \"%s\" is used by generated column \"%s\".",
colName, get_attname(foundObject.objectId, foundObject.objectSubId, false))));
}
else
{
/* Not expecting any other direct dependencies... */
@ -10174,7 +10262,8 @@ ATExecAlterColumnType(AlteredTableInfo *tab, Relation rel,
/*
* Now scan for dependencies of this column on other things. The only
* thing we should find is the dependency on the column datatype, which we
* want to remove, and possibly a collation dependency.
* want to remove, possibly a collation dependency, and dependencies on
* other columns if it is a generated column.
*/
ScanKeyInit(&key[0],
Anum_pg_depend_classid,
@ -10195,15 +10284,26 @@ ATExecAlterColumnType(AlteredTableInfo *tab, Relation rel,
while (HeapTupleIsValid(depTup = systable_getnext(scan)))
{
Form_pg_depend foundDep = (Form_pg_depend) GETSTRUCT(depTup);
ObjectAddress foundObject;
if (foundDep->deptype != DEPENDENCY_NORMAL)
foundObject.classId = foundDep->refclassid;
foundObject.objectId = foundDep->refobjid;
foundObject.objectSubId = foundDep->refobjsubid;
if (foundDep->deptype != DEPENDENCY_NORMAL &&
foundDep->deptype != DEPENDENCY_AUTO)
elog(ERROR, "found unexpected dependency type '%c'",
foundDep->deptype);
if (!(foundDep->refclassid == TypeRelationId &&
foundDep->refobjid == attTup->atttypid) &&
!(foundDep->refclassid == CollationRelationId &&
foundDep->refobjid == attTup->attcollation))
elog(ERROR, "found unexpected dependency for column");
foundDep->refobjid == attTup->attcollation) &&
!(foundDep->refclassid == RelationRelationId &&
foundDep->refobjid == RelationGetRelid(rel) &&
foundDep->refobjsubid != 0)
)
elog(ERROR, "found unexpected dependency for column: %s",
getObjectDescription(&foundObject));
CatalogTupleDelete(depRel, &depTup->t_self);
}
@ -14267,6 +14367,18 @@ ComputePartitionAttrs(ParseState *pstate, Relation rel, List *partParams, AttrNu
pelem->name),
parser_errposition(pstate, pelem->location)));
/*
* Generated columns cannot work: They are computed after BEFORE
* triggers, but partition routing is done before all triggers.
*/
if (attform->attgenerated)
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("cannot use generated column in partition key"),
errdetail("Column \"%s\" is a generated column.",
pelem->name),
parser_errposition(pstate, pelem->location)));
partattrs[attn] = attform->attnum;
atttype = attform->atttypid;
attcollation = attform->attcollation;
@ -14354,6 +14466,25 @@ ComputePartitionAttrs(ParseState *pstate, Relation rel, List *partParams, AttrNu
errmsg("partition key expressions cannot contain system column references")));
}
/*
* Generated columns cannot work: They are computed after
* BEFORE triggers, but partition routing is done before all
* triggers.
*/
i = -1;
while ((i = bms_next_member(expr_attrs, i)) >= 0)
{
AttrNumber attno = i + FirstLowInvalidHeapAttributeNumber;
if (TupleDescAttr(RelationGetDescr(rel), attno - 1)->attgenerated)
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("cannot use generated column in partition key"),
errdetail("Column \"%s\" is a generated column.",
get_attname(RelationGetRelid(rel), attno, false)),
parser_errposition(pstate, pelem->location)));
}
/*
* While it is not exactly *wrong* for a partition expression
* to be a constant, it seems better to reject such keys.

31
src/backend/commands/trigger.c
View File

@ -75,8 +75,9 @@ static int MyTriggerDepth = 0;
* they use, so we let them be duplicated. Be sure to update all if one needs
* to be changed, however.
*/
#define GetUpdatedColumns(relinfo, estate) \
(exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->updatedCols)
#define GetAllUpdatedColumns(relinfo, estate) \
(bms_union(exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->updatedCols, \
exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->extraUpdatedCols))
/* Local function prototypes */
static void ConvertTriggerToFK(CreateTrigStmt *stmt, Oid funcoid);
@ -640,6 +641,24 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("BEFORE trigger's WHEN condition cannot reference NEW system columns"),
parser_errposition(pstate, var->location)));
if (TRIGGER_FOR_BEFORE(tgtype) &&
var->varattno == 0 &&
RelationGetDescr(rel)->constr &&
RelationGetDescr(rel)->constr->has_generated_stored)
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("BEFORE trigger's WHEN condition cannot reference NEW generated columns"),
errdetail("A whole-row reference is used and the table contains generated columns."),
parser_errposition(pstate, var->location)));
if (TRIGGER_FOR_BEFORE(tgtype) &&
var->varattno > 0 &&
TupleDescAttr(RelationGetDescr(rel), var->varattno - 1)->attgenerated)
ereport(ERROR,
(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
errmsg("BEFORE trigger's WHEN condition cannot reference NEW generated columns"),
errdetail("Column \"%s\" is a generated column.",
NameStr(TupleDescAttr(RelationGetDescr(rel), var->varattno - 1)->attname)),
parser_errposition(pstate, var->location)));
break;
default:
/* can't happen without add_missing_from, so just elog */
@ -2931,7 +2950,7 @@ ExecBSUpdateTriggers(EState *estate, ResultRelInfo *relinfo)
CMD_UPDATE))
return;
updatedCols = GetUpdatedColumns(relinfo, estate);
updatedCols = GetAllUpdatedColumns(relinfo, estate);
LocTriggerData.type = T_TriggerData;
LocTriggerData.tg_event = TRIGGER_EVENT_UPDATE |
@ -2980,7 +2999,7 @@ ExecASUpdateTriggers(EState *estate, ResultRelInfo *relinfo,
if (trigdesc && trigdesc->trig_update_after_statement)
AfterTriggerSaveEvent(estate, relinfo, TRIGGER_EVENT_UPDATE,
false, NULL, NULL, NIL,
GetUpdatedColumns(relinfo, estate),
GetAllUpdatedColumns(relinfo, estate),
transition_capture);
}
@ -3049,7 +3068,7 @@ ExecBRUpdateTriggers(EState *estate, EPQState *epqstate,
LocTriggerData.tg_relation = relinfo->ri_RelationDesc;
LocTriggerData.tg_oldtable = NULL;
LocTriggerData.tg_newtable = NULL;
updatedCols = GetUpdatedColumns(relinfo, estate);
updatedCols = GetAllUpdatedColumns(relinfo, estate);
for (i = 0; i < trigdesc->numtriggers; i++)
{
Trigger *trigger = &trigdesc->triggers[i];
@ -3140,7 +3159,7 @@ ExecARUpdateTriggers(EState *estate, ResultRelInfo *relinfo,
AfterTriggerSaveEvent(estate, relinfo, TRIGGER_EVENT_UPDATE,
true, oldslot, newslot, recheckIndexes,
GetUpdatedColumns(relinfo, estate),
GetAllUpdatedColumns(relinfo, estate),
transition_capture);
}
}

6
src/backend/commands/typecmds.c
View File

@ -918,7 +918,8 @@ DefineDomain(CreateDomainStmt *stmt)
defaultExpr = cookDefault(pstate, constr->raw_expr,
basetypeoid,
basetypeMod,
domainName);
domainName,
0);
/*
* If the expression is just a NULL constant, we treat it
@ -2228,7 +2229,8 @@ AlterDomainDefault(List *names, Node *defaultRaw)
defaultExpr = cookDefault(pstate, defaultRaw,
typTup->typbasetype,
typTup->typtypmod,
NameStr(typTup->typname));
NameStr(typTup->typname),
0);
/*
* If the expression is just a NULL constant, we treat the command

8
src/backend/executor/execMain.c
View File

@ -102,7 +102,7 @@ static void EvalPlanQualStart(EPQState *epqstate, EState *parentestate,
Plan *planTree);
/*
* Note that GetUpdatedColumns() also exists in commands/trigger.c. There does
* Note that GetAllUpdatedColumns() also exists in commands/trigger.c. There does
* not appear to be any good header to put it into, given the structures that
* it uses, so we let them be duplicated. Be sure to update both if one needs
* to be changed, however.
@ -111,6 +111,9 @@ static void EvalPlanQualStart(EPQState *epqstate, EState *parentestate,
(exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->insertedCols)
#define GetUpdatedColumns(relinfo, estate) \
(exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->updatedCols)
#define GetAllUpdatedColumns(relinfo, estate) \
(bms_union(exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->updatedCols, \
exec_rt_fetch((relinfo)->ri_RangeTableIndex, estate)->extraUpdatedCols))
/* end of local decls */
@ -1316,6 +1319,7 @@ InitResultRelInfo(ResultRelInfo *resultRelInfo,
resultRelInfo->ri_FdwState = NULL;
resultRelInfo->ri_usesFdwDirectModify = false;
resultRelInfo->ri_ConstraintExprs = NULL;
resultRelInfo->ri_GeneratedExprs = NULL;
resultRelInfo->ri_junkFilter = NULL;
resultRelInfo->ri_projectReturning = NULL;
resultRelInfo->ri_onConflictArbiterIndexes = NIL;
@ -2328,7 +2332,7 @@ ExecUpdateLockMode(EState *estate, ResultRelInfo *relinfo)
* been modified, then we can use a weaker lock, allowing for better
* concurrency.
*/
updatedCols = GetUpdatedColumns(relinfo, estate);
updatedCols = GetAllUpdatedColumns(relinfo, estate);
keyCols = RelationGetIndexAttrBitmap(relinfo->ri_RelationDesc,
INDEX_ATTR_BITMAP_KEY);

11
src/backend/executor/execReplication.c
View File

@ -21,6 +21,7 @@
#include "access/xact.h"
#include "commands/trigger.h"
#include "executor/executor.h"
#include "executor/nodeModifyTable.h"
#include "nodes/nodeFuncs.h"
#include "parser/parse_relation.h"
#include "parser/parsetree.h"
@ -412,6 +413,11 @@ ExecSimpleRelationInsert(EState *estate, TupleTableSlot *slot)
{
List *recheckIndexes = NIL;
/* Compute stored generated columns */
if (rel->rd_att->constr &&
rel->rd_att->constr->has_generated_stored)
ExecComputeStoredGenerated(estate, slot);
/* Check the constraints of the tuple */
if (rel->rd_att->constr)
ExecConstraints(resultRelInfo, slot, estate);
@ -473,6 +479,11 @@ ExecSimpleRelationUpdate(EState *estate, EPQState *epqstate,
List *recheckIndexes = NIL;
bool update_indexes;
/* Compute stored generated columns */
if (rel->rd_att->constr &&
rel->rd_att->constr->has_generated_stored)
ExecComputeStoredGenerated(estate, slot);
/* Check the constraints of the tuple */
if (rel->rd_att->constr)
ExecConstraints(resultRelInfo, slot, estate);

112
src/backend/executor/nodeModifyTable.c
View File

@ -49,6 +49,7 @@
#include "foreign/fdwapi.h"
#include "miscadmin.h"
#include "nodes/nodeFuncs.h"
#include "rewrite/rewriteHandler.h"
#include "storage/bufmgr.h"
#include "storage/lmgr.h"
#include "utils/builtins.h"
@ -240,6 +241,89 @@ ExecCheckTIDVisible(EState *estate,
ExecClearTuple(tempSlot);
}
/*
* Compute stored generated columns for a tuple
*/
void
ExecComputeStoredGenerated(EState *estate, TupleTableSlot *slot)
{
ResultRelInfo *resultRelInfo = estate->es_result_relation_info;
Relation rel = resultRelInfo->ri_RelationDesc;
TupleDesc tupdesc = RelationGetDescr(rel);
int natts = tupdesc->natts;
MemoryContext oldContext;
Datum *values;
bool *nulls;
bool *replaces;
HeapTuple oldtuple, newtuple;
bool should_free;
Assert(tupdesc->constr && tupdesc->constr->has_generated_stored);
/*
* If first time through for this result relation, build expression
* nodetrees for rel's stored generation expressions. Keep them in the
* per-query memory context so they'll survive throughout the query.
*/
if (resultRelInfo->ri_GeneratedExprs == NULL)
{
oldContext = MemoryContextSwitchTo(estate->es_query_cxt);
resultRelInfo->ri_GeneratedExprs =
(ExprState **) palloc(natts * sizeof(ExprState *));
for (int i = 0; i < natts; i++)
{
if (TupleDescAttr(tupdesc, i)->attgenerated == ATTRIBUTE_GENERATED_STORED)
{
Expr *expr;
expr = (Expr *) build_column_default(rel, i + 1);
if (expr == NULL)
elog(ERROR, "no generation expression found for column number %d of table \"%s\"",
i + 1, RelationGetRelationName(rel));
resultRelInfo->ri_GeneratedExprs[i] = ExecPrepareExpr(expr, estate);
}
}
MemoryContextSwitchTo(oldContext);
}
oldContext = MemoryContextSwitchTo(GetPerTupleMemoryContext(estate));
values = palloc(sizeof(*values) * natts);
nulls = palloc(sizeof(*nulls) * natts);
replaces = palloc0(sizeof(*replaces) * natts);
for (int i = 0; i < natts; i++)
{
if (TupleDescAttr(tupdesc, i)->attgenerated == ATTRIBUTE_GENERATED_STORED)
{
ExprContext *econtext;
Datum val;
bool isnull;
econtext = GetPerTupleExprContext(estate);
econtext->ecxt_scantuple = slot;
val = ExecEvalExpr(resultRelInfo->ri_GeneratedExprs[i], econtext, &isnull);
values[i] = val;
nulls[i] = isnull;
replaces[i] = true;
}
}
oldtuple = ExecFetchSlotHeapTuple(slot, true, &should_free);
newtuple = heap_modify_tuple(oldtuple, tupdesc, values, nulls, replaces);
ExecForceStoreHeapTuple(newtuple, slot);
if (should_free)
heap_freetuple(oldtuple);
MemoryContextSwitchTo(oldContext);
}
/* ----------------------------------------------------------------
* ExecInsert
*
@ -297,6 +381,13 @@ ExecInsert(ModifyTableState *mtstate,
}
else if (resultRelInfo->ri_FdwRoutine)
{
/*
* Compute stored generated columns
*/
if (resultRelationDesc->rd_att->constr &&
resultRelationDesc->rd_att->constr->has_generated_stored)
ExecComputeStoredGenerated(estate, slot);
/*
* insert into foreign table: let the FDW do it
*/
@ -326,6 +417,13 @@ ExecInsert(ModifyTableState *mtstate,
*/
slot->tts_tableOid = RelationGetRelid(resultRelationDesc);
/*
* Compute stored generated columns
*/
if (resultRelationDesc->rd_att->constr &&
resultRelationDesc->rd_att->constr->has_generated_stored)
ExecComputeStoredGenerated(estate, slot);
/*
* Check any RLS WITH CHECK policies.
*
@ -964,6 +1062,13 @@ ExecUpdate(ModifyTableState *mtstate,
}
else if (resultRelInfo->ri_FdwRoutine)
{
/*
* Compute stored generated columns
*/
if (resultRelationDesc->rd_att->constr &&
resultRelationDesc->rd_att->constr->has_generated_stored)
ExecComputeStoredGenerated(estate, slot);
/*
* update in foreign table: let the FDW do it
*/
@ -994,6 +1099,13 @@ ExecUpdate(ModifyTableState *mtstate,
*/
slot->tts_tableOid = RelationGetRelid(resultRelationDesc);
/*
* Compute stored generated columns
*/
if (resultRelationDesc->rd_att->constr &&
resultRelationDesc->rd_att->constr->has_generated_stored)
ExecComputeStoredGenerated(estate, slot);
/*
* Check any RLS UPDATE WITH CHECK policies
*

2
src/backend/nodes/copyfuncs.c
View File

@ -2390,6 +2390,7 @@ _copyRangeTblEntry(const RangeTblEntry *from)
COPY_BITMAPSET_FIELD(selectedCols);
COPY_BITMAPSET_FIELD(insertedCols);
COPY_BITMAPSET_FIELD(updatedCols);
COPY_BITMAPSET_FIELD(extraUpdatedCols);
COPY_NODE_FIELD(securityQuals);
return newnode;
@ -2888,6 +2889,7 @@ _copyColumnDef(const ColumnDef *from)
COPY_NODE_FIELD(cooked_default);
COPY_SCALAR_FIELD(identity);
COPY_NODE_FIELD(identitySequence);
COPY_SCALAR_FIELD(generated);
COPY_NODE_FIELD(collClause);
COPY_SCALAR_FIELD(collOid);
COPY_NODE_FIELD(constraints);

2
src/backend/nodes/equalfuncs.c
View File

@ -2565,6 +2565,7 @@ _equalColumnDef(const ColumnDef *a, const ColumnDef *b)
COMPARE_NODE_FIELD(cooked_default);
COMPARE_SCALAR_FIELD(identity);
COMPARE_NODE_FIELD(identitySequence);
COMPARE_SCALAR_FIELD(generated);
COMPARE_NODE_FIELD(collClause);
COMPARE_SCALAR_FIELD(collOid);
COMPARE_NODE_FIELD(constraints);
@ -2664,6 +2665,7 @@ _equalRangeTblEntry(const RangeTblEntry *a, const RangeTblEntry *b)
COMPARE_BITMAPSET_FIELD(selectedCols);
COMPARE_BITMAPSET_FIELD(insertedCols);
COMPARE_BITMAPSET_FIELD(updatedCols);
COMPARE_BITMAPSET_FIELD(extraUpdatedCols);
COMPARE_NODE_FIELD(securityQuals);
return true;

9
src/backend/nodes/outfuncs.c
View File

@ -2792,6 +2792,7 @@ _outColumnDef(StringInfo str, const ColumnDef *node)
WRITE_NODE_FIELD(cooked_default);
WRITE_CHAR_FIELD(identity);
WRITE_NODE_FIELD(identitySequence);
WRITE_CHAR_FIELD(generated);
WRITE_NODE_FIELD(collClause);
WRITE_OID_FIELD(collOid);
WRITE_NODE_FIELD(constraints);
@ -3096,6 +3097,7 @@ _outRangeTblEntry(StringInfo str, const RangeTblEntry *node)
WRITE_BITMAPSET_FIELD(selectedCols);
WRITE_BITMAPSET_FIELD(insertedCols);
WRITE_BITMAPSET_FIELD(updatedCols);
WRITE_BITMAPSET_FIELD(extraUpdatedCols);
WRITE_NODE_FIELD(securityQuals);
}
@ -3467,6 +3469,13 @@ _outConstraint(StringInfo str, const Constraint *node)
WRITE_CHAR_FIELD(generated_when);
break;
case CONSTR_GENERATED:
appendStringInfoString(str, "GENERATED");
WRITE_NODE_FIELD(raw_expr);
WRITE_STRING_FIELD(cooked_expr);
WRITE_CHAR_FIELD(generated_when);
break;
case CONSTR_CHECK:
appendStringInfoString(str, "CHECK");
WRITE_BOOL_FIELD(is_no_inherit);

1
src/backend/nodes/readfuncs.c
View File

@ -1430,6 +1430,7 @@ _readRangeTblEntry(void)
READ_BITMAPSET_FIELD(selectedCols);
READ_BITMAPSET_FIELD(insertedCols);
READ_BITMAPSET_FIELD(updatedCols);
READ_BITMAPSET_FIELD(extraUpdatedCols);
READ_NODE_FIELD(securityQuals);
READ_DONE();

8
src/backend/optimizer/plan/createplan.c
View File

@ -6570,8 +6570,9 @@ make_modifytable(PlannerInfo *root,
/*
* Try to modify the foreign table directly if (1) the FDW provides
* callback functions needed for that, (2) there are no row-level
* triggers on the foreign table, and (3) there are no WITH CHECK
* callback functions needed for that and (2) there are no local
* structures that need to be run for each modified row: row-level
* triggers on the foreign table, stored generated columns, WITH CHECK
* OPTIONs from parent views.
*/
direct_modify = false;
@ -6581,7 +6582,8 @@ make_modifytable(PlannerInfo *root,
fdwroutine->IterateDirectModify != NULL &&
fdwroutine->EndDirectModify != NULL &&
withCheckOptionLists == NIL &&
!has_row_triggers(subroot, rti, operation))
!has_row_triggers(subroot, rti, operation) &&
!has_stored_generated_columns(subroot, rti))
direct_modify = fdwroutine->PlanDirectModify(subroot, node, rti, i);
if (direct_modify)
direct_modify_plans = bms_add_member(direct_modify_plans, i);

6
src/backend/optimizer/util/inherit.c
View File

@ -280,6 +280,10 @@ expand_partitioned_rtentry(PlannerInfo *root, RangeTblEntry *parentrte,
if (!root->partColsUpdated)
root->partColsUpdated =
has_partition_attrs(parentrel, parentrte->updatedCols, NULL);
/*
* There shouldn't be any generated columns in the partition key.
*/
Assert(!has_partition_attrs(parentrel, parentrte->extraUpdatedCols, NULL));
/*
* If the partitioned table has no partitions, treat this as the
@ -415,6 +419,8 @@ expand_single_inheritance_child(PlannerInfo *root, RangeTblEntry *parentrte,
appinfo->translated_vars);
childrte->updatedCols = translate_col_privs(parentrte->updatedCols,
appinfo->translated_vars);
childrte->extraUpdatedCols = translate_col_privs(parentrte->extraUpdatedCols,
appinfo->translated_vars);
}
/*

19
src/backend/optimizer/util/plancat.c
View File

@ -2083,6 +2083,25 @@ has_row_triggers(PlannerInfo *root, Index rti, CmdType event)
return result;
}
bool
has_stored_generated_columns(PlannerInfo *root, Index rti)
{
RangeTblEntry *rte = planner_rt_fetch(rti, root);
Relation relation;
TupleDesc tupdesc;
bool result = false;
/* Assume we already have adequate lock */
relation = heap_open(rte->relid, NoLock);
tupdesc = RelationGetDescr(relation);
result = tupdesc->constr && tupdesc->constr->has_generated_stored;
heap_close(relation, NoLock);
return result;
}
/*
* set_relation_partition_info
*

27
src/backend/parser/analyze.c
View File

@ -2287,6 +2287,7 @@ transformUpdateTargetList(ParseState *pstate, List *origTlist)
RangeTblEntry *target_rte;
ListCell *orig_tl;
ListCell *tl;
TupleDesc tupdesc = pstate->p_target_relation->rd_att;
tlist = transformTargetList(pstate, origTlist,
EXPR_KIND_UPDATE_SOURCE);
@ -2345,6 +2346,32 @@ transformUpdateTargetList(ParseState *pstate, List *origTlist)
if (orig_tl != NULL)
elog(ERROR, "UPDATE target count mismatch --- internal error");
/*
* Record in extraUpdatedCols generated columns referencing updated base
* columns.
*/
if (tupdesc->constr &&
tupdesc->constr->has_generated_stored)
{
for (int i = 0; i < tupdesc->constr->num_defval; i++)
{
AttrDefault defval = tupdesc->constr->defval[i];
Node *expr;
Bitmapset *attrs_used = NULL;
/* skip if not generated column */
if (!TupleDescAttr(tupdesc, defval.adnum - 1)->attgenerated)
continue;
expr = stringToNode(defval.adbin);
pull_varattnos(expr, 1, &attrs_used);
if (bms_overlap(target_rte->updatedCols, attrs_used))
target_rte->extraUpdatedCols = bms_add_member(target_rte->extraUpdatedCols,
defval.adnum - FirstLowInvalidHeapAttributeNumber);
}
}
return tlist;
}

14
src/backend/parser/gram.y
View File

@ -681,7 +681,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
SAVEPOINT SCHEMA SCHEMAS SCROLL SEARCH SECOND_P SECURITY SELECT SEQUENCE SEQUENCES
SERIALIZABLE SERVER SESSION SESSION_USER SET SETS SETOF SHARE SHOW
SIMILAR SIMPLE SKIP SMALLINT SNAPSHOT SOME SQL_P STABLE STANDALONE_P
START STATEMENT STATISTICS STDIN STDOUT STORAGE STRICT_P STRIP_P
START STATEMENT STATISTICS STDIN STDOUT STORAGE STORED STRICT_P STRIP_P
SUBSCRIPTION SUBSTRING SUPPORT SYMMETRIC SYSID SYSTEM_P
TABLE TABLES TABLESAMPLE TABLESPACE TEMP TEMPLATE TEMPORARY TEXT_P THEN
@ -3497,6 +3497,16 @@ ColConstraintElem:
n->location = @1;
$$ = (Node *)n;
}
| GENERATED generated_when AS '(' a_expr ')' STORED
{
Constraint *n = makeNode(Constraint);
n->contype = CONSTR_GENERATED;
n->generated_when = $2;
n->raw_expr = $5;
n->cooked_expr = NULL;
n->location = @1;
$$ = (Node *)n;
}
| REFERENCES qualified_name opt_column_list key_match key_actions
{
Constraint *n = makeNode(Constraint);
@ -3587,6 +3597,7 @@ TableLikeOption:
| CONSTRAINTS { $$ = CREATE_TABLE_LIKE_CONSTRAINTS; }
| DEFAULTS { $$ = CREATE_TABLE_LIKE_DEFAULTS; }
| IDENTITY_P { $$ = CREATE_TABLE_LIKE_IDENTITY; }
| GENERATED { $$ = CREATE_TABLE_LIKE_GENERATED; }
| INDEXES { $$ = CREATE_TABLE_LIKE_INDEXES; }
| STATISTICS { $$ = CREATE_TABLE_LIKE_STATISTICS; }
| STORAGE { $$ = CREATE_TABLE_LIKE_STORAGE; }
@ -15234,6 +15245,7 @@ unreserved_keyword:
| STDIN
| STDOUT
| STORAGE
| STORED
| STRICT_P
| STRIP_P
| SUBSCRIPTION

11
src/backend/parser/parse_agg.c
View File

@ -520,6 +520,14 @@ check_agglevels_and_constraints(ParseState *pstate, Node *expr)
err = _("grouping operations are not allowed in partition key expressions");
break;
case EXPR_KIND_GENERATED_COLUMN:
if (isAgg)
err = _("aggregate functions are not allowed in column generation expressions");
else
err = _("grouping operations are not allowed in column generation expressions");
break;
case EXPR_KIND_CALL_ARGUMENT:
if (isAgg)
@ -922,6 +930,9 @@ transformWindowFuncCall(ParseState *pstate, WindowFunc *wfunc,
case EXPR_KIND_COPY_WHERE:
err = _("window functions are not allowed in COPY FROM WHERE conditions");
break;
case EXPR_KIND_GENERATED_COLUMN:
err = _("window functions are not allowed in column generation expressions");
break;
/*
* There is intentionally no default: case here, so that the

6
src/backend/parser/parse_expr.c
View File

@ -570,6 +570,7 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
case EXPR_KIND_PARTITION_EXPRESSION:
case EXPR_KIND_CALL_ARGUMENT:
case EXPR_KIND_COPY_WHERE:
case EXPR_KIND_GENERATED_COLUMN:
/* okay */
break;
@ -1927,6 +1928,9 @@ transformSubLink(ParseState *pstate, SubLink *sublink)
case EXPR_KIND_COPY_WHERE:
err = _("cannot use subquery in COPY FROM WHERE condition");
break;
case EXPR_KIND_GENERATED_COLUMN:
err = _("cannot use subquery in column generation expression");
break;
/*
* There is intentionally no default: case here, so that the
@ -3557,6 +3561,8 @@ ParseExprKindName(ParseExprKind exprKind)
return "CALL";
case EXPR_KIND_COPY_WHERE:
return "WHERE";
case EXPR_KIND_GENERATED_COLUMN:
return "GENERATED AS";
/*
* There is intentionally no default: case here, so that the

3
src/backend/parser/parse_func.c
View File

@ -2526,6 +2526,9 @@ check_srf_call_placement(ParseState *pstate, Node *last_srf, int location)
case EXPR_KIND_COPY_WHERE:
err = _("set-returning functions are not allowed in COPY FROM WHERE conditions");
break;
case EXPR_KIND_GENERATED_COLUMN:
err = _("set-returning functions are not allowed in column generation expressions");
break;
/*
* There is intentionally no default: case here, so that the

19
src/backend/parser/parse_relation.c
View File

@ -731,6 +731,17 @@ scanRTEForColumn(ParseState *pstate, RangeTblEntry *rte, const char *colname,
colname),
parser_errposition(pstate, location)));
/*
* In generated column, no system column is allowed except tableOid.
*/
if (pstate->p_expr_kind == EXPR_KIND_GENERATED_COLUMN &&
attnum < InvalidAttrNumber && attnum != TableOidAttributeNumber)
ereport(ERROR,
(errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
errmsg("cannot use system column \"%s\" in column generation expression",
colname),
parser_errposition(pstate, location)));
if (attnum != InvalidAttrNumber)
{
/* now check to see if column actually is defined */
@ -1257,6 +1268,7 @@ addRangeTableEntry(ParseState *pstate,
rte->selectedCols = NULL;
rte->insertedCols = NULL;
rte->updatedCols = NULL;
rte->extraUpdatedCols = NULL;
/*
* Add completed RTE to pstate's range table list, but not to join list
@ -1328,6 +1340,7 @@ addRangeTableEntryForRelation(ParseState *pstate,
rte->selectedCols = NULL;
rte->insertedCols = NULL;
rte->updatedCols = NULL;
rte->extraUpdatedCols = NULL;
/*
* Add completed RTE to pstate's range table list, but not to join list
@ -1407,6 +1420,7 @@ addRangeTableEntryForSubquery(ParseState *pstate,
rte->selectedCols = NULL;
rte->insertedCols = NULL;
rte->updatedCols = NULL;
rte->extraUpdatedCols = NULL;
/*
* Add completed RTE to pstate's range table list, but not to join list
@ -1670,6 +1684,7 @@ addRangeTableEntryForFunction(ParseState *pstate,
rte->selectedCols = NULL;
rte->insertedCols = NULL;
rte->updatedCols = NULL;
rte->extraUpdatedCols = NULL;
/*
* Add completed RTE to pstate's range table list, but not to join list
@ -1733,6 +1748,7 @@ addRangeTableEntryForTableFunc(ParseState *pstate,
rte->selectedCols = NULL;
rte->insertedCols = NULL;
rte->updatedCols = NULL;
rte->extraUpdatedCols = NULL;
/*
* Add completed RTE to pstate's range table list, but not to join list
@ -1811,6 +1827,7 @@ addRangeTableEntryForValues(ParseState *pstate,
rte->selectedCols = NULL;
rte->insertedCols = NULL;
rte->updatedCols = NULL;
rte->extraUpdatedCols = NULL;
/*
* Add completed RTE to pstate's range table list, but not to join list
@ -1881,6 +1898,7 @@ addRangeTableEntryForJoin(ParseState *pstate,
rte->selectedCols = NULL;
rte->insertedCols = NULL;
rte->updatedCols = NULL;
rte->extraUpdatedCols = NULL;
/*
* Add completed RTE to pstate's range table list, but not to join list
@ -1983,6 +2001,7 @@ addRangeTableEntryForCTE(ParseState *pstate,
rte->selectedCols = NULL;
rte->insertedCols = NULL;
rte->updatedCols = NULL;
rte->extraUpdatedCols = NULL;
/*
* Add completed RTE to pstate's range table list, but not to join list

70
src/backend/parser/parse_utilcmd.c
View File

@ -502,6 +502,7 @@ transformColumnDefinition(CreateStmtContext *cxt, ColumnDef *column)
bool saw_nullable;
bool saw_default;
bool saw_identity;
bool saw_generated;
ListCell *clist;
cxt->columns = lappend(cxt->columns, column);
@ -609,6 +610,7 @@ transformColumnDefinition(CreateStmtContext *cxt, ColumnDef *column)
saw_nullable = false;
saw_default = false;
saw_identity = false;
saw_generated = false;
foreach(clist, column->constraints)
{
@ -689,6 +691,29 @@ transformColumnDefinition(CreateStmtContext *cxt, ColumnDef *column)
break;
}
case CONSTR_GENERATED:
if (cxt->ofType)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("generated columns are not supported on typed tables")));
if (cxt->partbound)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("generated columns are not supported on partitions")));
if (saw_generated)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("multiple generation clauses specified for column \"%s\" of table \"%s\"",
column->colname, cxt->relation->relname),
parser_errposition(cxt->pstate,
constraint->location)));
column->generated = ATTRIBUTE_GENERATED_STORED;
column->raw_default = constraint->raw_expr;
Assert(constraint->cooked_expr == NULL);
saw_generated = true;
break;
case CONSTR_CHECK:
cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
break;
@ -755,6 +780,22 @@ transformColumnDefinition(CreateStmtContext *cxt, ColumnDef *column)
column->colname, cxt->relation->relname),
parser_errposition(cxt->pstate,
constraint->location)));
if (saw_default && saw_generated)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("both default and generation expression specified for column \"%s\" of table \"%s\"",
column->colname, cxt->relation->relname),
parser_errposition(cxt->pstate,
constraint->location)));
if (saw_identity && saw_generated)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("both identity and generation expression specified for column \"%s\" of table \"%s\"",
column->colname, cxt->relation->relname),
parser_errposition(cxt->pstate,
constraint->location)));
}
/*
@ -983,11 +1024,13 @@ transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_cla
* Copy default, if present and the default has been requested
*/
if (attribute->atthasdef &&
(table_like_clause->options & CREATE_TABLE_LIKE_DEFAULTS))
(table_like_clause->options & CREATE_TABLE_LIKE_DEFAULTS ||
table_like_clause->options & CREATE_TABLE_LIKE_GENERATED))
{
Node *this_default = NULL;
AttrDefault *attrdef;
int i;
bool found_whole_row;
/* Find default in constraint structure */
Assert(constr != NULL);
@ -1002,12 +1045,27 @@ transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_cla
}
Assert(this_default != NULL);
/*
* If default expr could contain any vars, we'd need to fix 'em,
* but it can't; so default is ready to apply to child.
*/
def->cooked_default = map_variable_attnos(this_default,
1, 0,
attmap, tupleDesc->natts,
InvalidOid, &found_whole_row);
def->cooked_default = this_default;
/*
* Prevent this for the same reason as for constraints below.
* Note that defaults cannot contain any vars, so it's OK that the
* error message refers to generated columns.
*/
if (found_whole_row)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot convert whole-row table reference"),
errdetail("Generation expression for column \"%s\" contains a whole-row reference to table \"%s\".",
attributeName,
RelationGetRelationName(relation))));
if (attribute->attgenerated &&
(table_like_clause->options & CREATE_TABLE_LIKE_GENERATED))
def->generated = attribute->attgenerated;
}
/*

9
src/backend/replication/logical/proto.c
View File

@ -453,7 +453,7 @@ logicalrep_write_tuple(StringInfo out, Relation rel, HeapTuple tuple)
for (i = 0; i < desc->natts; i++)
{
if (TupleDescAttr(desc, i)->attisdropped)
if (TupleDescAttr(desc, i)->attisdropped || TupleDescAttr(desc, i)->attgenerated)
continue;
nliveatts++;
}
@ -473,8 +473,7 @@ logicalrep_write_tuple(StringInfo out, Relation rel, HeapTuple tuple)
Form_pg_attribute att = TupleDescAttr(desc, i);
char *outputstr;
/* skip dropped columns */
if (att->attisdropped)
if (att->attisdropped || att->attgenerated)
continue;
if (isnull[i])
@ -573,7 +572,7 @@ logicalrep_write_attrs(StringInfo out, Relation rel)
/* send number of live attributes */
for (i = 0; i < desc->natts; i++)
{
if (TupleDescAttr(desc, i)->attisdropped)
if (TupleDescAttr(desc, i)->attisdropped || TupleDescAttr(desc, i)->attgenerated)
continue;
nliveatts++;
}
@ -591,7 +590,7 @@ logicalrep_write_attrs(StringInfo out, Relation rel)
Form_pg_attribute att = TupleDescAttr(desc, i);
uint8 flags = 0;
if (att->attisdropped)
if (att->attisdropped || att->attgenerated)
continue;
/* REPLICA IDENTITY FULL means all columns are sent as part of key. */

2
src/backend/replication/logical/relation.c
View File

@ -276,7 +276,7 @@ logicalrep_rel_open(LogicalRepRelId remoteid, LOCKMODE lockmode)
int attnum;
Form_pg_attribute attr = TupleDescAttr(desc, i);
if (attr->attisdropped)
if (attr->attisdropped || attr->attgenerated)
{
entry->attrmap[i] = -1;
continue;

6
src/backend/replication/logical/tablesync.c
View File

@ -697,10 +697,12 @@ fetch_remote_table_info(char *nspname, char *relname,
" LEFT JOIN pg_catalog.pg_index i"
" ON (i.indexrelid = pg_get_replica_identity_index(%u))"
" WHERE a.attnum > 0::pg_catalog.int2"
" AND NOT a.attisdropped"
" AND NOT a.attisdropped %s"
" AND a.attrelid = %u"
" ORDER BY a.attnum",
lrel->remoteid, lrel->remoteid);
lrel->remoteid,
(walrcv_server_version(wrconn) >= 120000 ? "AND a.attgenerated = ''" : ""),
lrel->remoteid);
res = walrcv_exec(wrconn, cmd.data, 4, attrRow);
if (res->status != WALRCV_OK_TUPLES)

2
src/backend/replication/logical/worker.c
View File

@ -236,7 +236,7 @@ slot_fill_defaults(LogicalRepRelMapEntry *rel, EState *estate,
{
Expr *defexpr;
if (TupleDescAttr(desc, attnum)->attisdropped)
if (TupleDescAttr(desc, attnum)->attisdropped || TupleDescAttr(desc, attnum)->attgenerated)
continue;
if (rel->attrmap[attnum] >= 0)

2
src/backend/replication/pgoutput/pgoutput.c
View File

@ -276,7 +276,7 @@ maybe_send_schema(LogicalDecodingContext *ctx,
{
Form_pg_attribute att = TupleDescAttr(desc, i);
if (att->attisdropped)
if (att->attisdropped || att->attgenerated)
continue;
if (att->atttypid < FirstNormalObjectId)

36
src/backend/rewrite/rewriteHandler.c
View File

@ -818,6 +818,13 @@ rewriteTargetListIU(List *targetList,
if (att_tup->attidentity == ATTRIBUTE_IDENTITY_BY_DEFAULT && override == OVERRIDING_USER_VALUE)
apply_default = true;
if (att_tup->attgenerated && !apply_default)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("cannot insert into column \"%s\"", NameStr(att_tup->attname)),
errdetail("Column \"%s\" is a generated column.",
NameStr(att_tup->attname))));
}
if (commandType == CMD_UPDATE)
@ -828,9 +835,23 @@ rewriteTargetListIU(List *targetList,
errmsg("column \"%s\" can only be updated to DEFAULT", NameStr(att_tup->attname)),
errdetail("Column \"%s\" is an identity column defined as GENERATED ALWAYS.",
NameStr(att_tup->attname))));
if (att_tup->attgenerated && new_tle && !apply_default)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("column \"%s\" can only be updated to DEFAULT", NameStr(att_tup->attname)),
errdetail("Column \"%s\" is a generated column.",
NameStr(att_tup->attname))));
}
if (apply_default)
if (att_tup->attgenerated)
{
/*
* stored generated column will be fixed in executor
*/
new_tle = NULL;
}
else if (apply_default)
{
Node *new_expr;
@ -1137,13 +1158,12 @@ build_column_default(Relation rel, int attrno)
}
}
if (expr == NULL)
{
/*
* No per-column default, so look for a default for the type itself.
*/
/*
* No per-column default, so look for a default for the type itself. But
* not for generated columns.
*/
if (expr == NULL && !att_tup->attgenerated)
expr = get_typdefault(atttype);
}
if (expr == NULL)
return NULL; /* No default anywhere */
@ -1720,12 +1740,14 @@ ApplyRetrieveRule(Query *parsetree,
subrte->selectedCols = rte->selectedCols;
subrte->insertedCols = rte->insertedCols;
subrte->updatedCols = rte->updatedCols;
subrte->extraUpdatedCols = rte->extraUpdatedCols;
rte->requiredPerms = 0; /* no permission check on subquery itself */
rte->checkAsUser = InvalidOid;
rte->selectedCols = NULL;
rte->insertedCols = NULL;
rte->updatedCols = NULL;
rte->extraUpdatedCols = NULL;
return parsetree;
}

33
src/backend/utils/cache/lsyscache.c vendored
View File

@ -821,6 +821,39 @@ get_attnum(Oid relid, const char *attname)
return InvalidAttrNumber;
}
/*
* get_attgenerated
*
* Given the relation id and the attribute name,
* return the "attgenerated" field from the attribute relation.
*
* Errors if not found.
*
* Since not generated is represented by '\0', this can also be used as a
* Boolean test.
*/
char
get_attgenerated(Oid relid, AttrNumber attnum)
{
HeapTuple tp;
tp = SearchSysCache2(ATTNUM,
ObjectIdGetDatum(relid),
Int16GetDatum(attnum));
if (HeapTupleIsValid(tp))
{
Form_pg_attribute att_tup = (Form_pg_attribute) GETSTRUCT(tp);
char result;
result = att_tup->attgenerated;
ReleaseSysCache(tp);
return result;
}
else
elog(ERROR, "cache lookup failed for attribute %d of relation %u",
attnum, relid);
}
/*
* get_atttype
*

1
src/backend/utils/cache/partcache.c vendored
View File

@ -27,6 +27,7 @@
#include "nodes/nodeFuncs.h"
#include "optimizer/optimizer.h"
#include "partitioning/partbounds.h"
#include "rewrite/rewriteHandler.h"
#include "utils/builtins.h"
#include "utils/datum.h"
#include "utils/lsyscache.h"

4
src/backend/utils/cache/relcache.c vendored
View File

@ -515,6 +515,7 @@ RelationBuildTupleDesc(Relation relation)
constr = (TupleConstr *) MemoryContextAlloc(CacheMemoryContext,
sizeof(TupleConstr));
constr->has_not_null = false;
constr->has_generated_stored = false;
/*
* Form a scan key that selects only user attributes (attnum > 0).
@ -567,6 +568,8 @@ RelationBuildTupleDesc(Relation relation)
/* Update constraint/default info */
if (attp->attnotnull)
constr->has_not_null = true;
if (attp->attgenerated == ATTRIBUTE_GENERATED_STORED)
constr->has_generated_stored = true;
/* If the column has a default, fill it into the attrdef array */
if (attp->atthasdef)
@ -3281,6 +3284,7 @@ RelationBuildLocalRelation(const char *relname,
Form_pg_attribute datt = TupleDescAttr(rel->rd_att, i);
datt->attidentity = satt->attidentity;
datt->attgenerated = satt->attgenerated;
datt->attnotnull = satt->attnotnull;
has_not_null |= satt->attnotnull;
}

40
src/bin/pg_dump/pg_dump.c
View File

@ -2051,6 +2051,11 @@ dumpTableData_insert(Archive *fout, void *dcontext)
{
if (field > 0)
archputs(", ", fout);
if (tbinfo->attgenerated[field])
{
archputs("DEFAULT", fout);
continue;
}
if (PQgetisnull(res, tuple, field))
{
archputs("NULL", fout);
@ -8219,6 +8224,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
int i_attnotnull;
int i_atthasdef;
int i_attidentity;
int i_attgenerated;
int i_attisdropped;
int i_attlen;
int i_attalign;
@ -8272,6 +8278,13 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
"a.attislocal,\n"
"pg_catalog.format_type(t.oid, a.atttypmod) AS atttypname,\n");
if (fout->remoteVersion >= 120000)
appendPQExpBuffer(q,
"a.attgenerated,\n");
else
appendPQExpBuffer(q,
"'' AS attgenerated,\n");
if (fout->remoteVersion >= 110000)
appendPQExpBuffer(q,
"CASE WHEN a.atthasmissing AND NOT a.attisdropped "
@ -8344,6 +8357,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
i_attnotnull = PQfnumber(res, "attnotnull");
i_atthasdef = PQfnumber(res, "atthasdef");
i_attidentity = PQfnumber(res, "attidentity");
i_attgenerated = PQfnumber(res, "attgenerated");
i_attisdropped = PQfnumber(res, "attisdropped");
i_attlen = PQfnumber(res, "attlen");
i_attalign = PQfnumber(res, "attalign");
@ -8361,6 +8375,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
tbinfo->attstorage = (char *) pg_malloc(ntups * sizeof(char));
tbinfo->typstorage = (char *) pg_malloc(ntups * sizeof(char));
tbinfo->attidentity = (char *) pg_malloc(ntups * sizeof(char));
tbinfo->attgenerated = (char *) pg_malloc(ntups * sizeof(char));
tbinfo->attisdropped = (bool *) pg_malloc(ntups * sizeof(bool));
tbinfo->attlen = (int *) pg_malloc(ntups * sizeof(int));
tbinfo->attalign = (char *) pg_malloc(ntups * sizeof(char));
@ -8387,6 +8402,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
tbinfo->attstorage[j] = *(PQgetvalue(res, j, i_attstorage));
tbinfo->typstorage[j] = *(PQgetvalue(res, j, i_typstorage));
tbinfo->attidentity[j] = *(PQgetvalue(res, j, i_attidentity));
tbinfo->attgenerated[j] = *(PQgetvalue(res, j, i_attgenerated));
tbinfo->needs_override = tbinfo->needs_override || (tbinfo->attidentity[j] == ATTRIBUTE_IDENTITY_ALWAYS);
tbinfo->attisdropped[j] = (PQgetvalue(res, j, i_attisdropped)[0] == 't');
tbinfo->attlen[j] = atoi(PQgetvalue(res, j, i_attlen));
@ -15708,6 +15724,20 @@ dumpTableSchema(Archive *fout, TableInfo *tbinfo)
tbinfo->atttypnames[j]);
}
if (has_default)
{
if (tbinfo->attgenerated[j] == ATTRIBUTE_GENERATED_STORED)
appendPQExpBuffer(q, " GENERATED ALWAYS AS (%s) STORED",
tbinfo->attrdefs[j]->adef_expr);
else
appendPQExpBuffer(q, " DEFAULT %s",
tbinfo->attrdefs[j]->adef_expr);
}
if (has_notnull)
appendPQExpBufferStr(q, " NOT NULL");
/* Add collation if not default for the type */
if (OidIsValid(tbinfo->attcollation[j]))
{
@ -15718,13 +15748,6 @@ dumpTableSchema(Archive *fout, TableInfo *tbinfo)
appendPQExpBuffer(q, " COLLATE %s",
fmtQualifiedDumpable(coll));
}
if (has_default)
appendPQExpBuffer(q, " DEFAULT %s",
tbinfo->attrdefs[j]->adef_expr);
if (has_notnull)
appendPQExpBufferStr(q, " NOT NULL");
}
}
@ -18303,6 +18326,7 @@ fmtCopyColumnList(const TableInfo *ti, PQExpBuffer buffer)
int numatts = ti->numatts;
char **attnames = ti->attnames;
bool *attisdropped = ti->attisdropped;
char *attgenerated = ti->attgenerated;
bool needComma;
int i;
@ -18312,6 +18336,8 @@ fmtCopyColumnList(const TableInfo *ti, PQExpBuffer buffer)
{
if (attisdropped[i])
continue;
if (attgenerated[i])
continue;
if (needComma)
appendPQExpBufferStr(buffer, ", ");
appendPQExpBufferStr(buffer, fmtId(attnames[i]));

1
src/bin/pg_dump/pg_dump.h
View File

@ -310,6 +310,7 @@ typedef struct _tableInfo
char *typstorage; /* type storage scheme */
bool *attisdropped; /* true if attr is dropped; don't dump it */
char *attidentity;
char *attgenerated;
int *attlen; /* attribute length, used by binary_upgrade */
char *attalign; /* attribute align, used by binary_upgrade */
bool *attislocal; /* true if attr has local definition */

10
src/bin/pg_dump/pg_dump_sort.c
View File

@ -1107,6 +1107,16 @@ repairDependencyLoop(DumpableObject **loop,
}
}
/* Loop of table with itself, happens with generated columns */
if (nLoop == 1)
{
if (loop[0]->objType == DO_TABLE)
{
removeObjectDependency(loop[0], loop[0]->dumpId);
return;
}
}
/*
* If all the objects are TABLE_DATA items, what we must have is a
* circular set of foreign key constraints (or a single self-referential

17
src/bin/pg_dump/t/002_pg_dump.pl
View File

@ -2392,6 +2392,23 @@ my %tests = (
unlike => { exclude_dump_test_schema => 1, },
},
'CREATE TABLE test_table_generated' => {
create_order => 3,
create_sql => 'CREATE TABLE dump_test.test_table_generated (
col1 int primary key,
col2 int generated always as (col1 * 2) stored
);',
regexp => qr/^
\QCREATE TABLE dump_test.test_table_generated (\E\n
\s+\Qcol1 integer NOT NULL,\E\n
\s+\Qcol2 integer GENERATED ALWAYS AS ((col1 * 2)) STORED\E\n
\);
/xms,
like =>
{ %full_runs, %dump_test_schema_runs, section_pre_data => 1, },
unlike => { exclude_dump_test_schema => 1, },
},
'CREATE TABLE table_with_stats' => {
create_order => 98,
create_sql => 'CREATE TABLE dump_test.table_index_stats (

23
src/bin/psql/describe.c
View File

@ -1464,6 +1464,7 @@ describeOneTableDetails(const char *schemaname,
attnotnull_col = -1,
attcoll_col = -1,
attidentity_col = -1,
attgenerated_col = -1,
isindexkey_col = -1,
indexdef_col = -1,
fdwopts_col = -1,
@ -1834,8 +1835,9 @@ describeOneTableDetails(const char *schemaname,
if (show_column_details)
{
/* use "pretty" mode for expression to avoid excessive parentheses */
appendPQExpBufferStr(&buf,
",\n (SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid) for 128)"
",\n (SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid, true) for 128)"
"\n FROM pg_catalog.pg_attrdef d"
"\n WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef)"
",\n a.attnotnull");
@ -1852,6 +1854,11 @@ describeOneTableDetails(const char *schemaname,
else
appendPQExpBufferStr(&buf, ",\n ''::pg_catalog.char AS attidentity");
attidentity_col = cols++;
if (pset.sversion >= 120000)
appendPQExpBufferStr(&buf, ",\n a.attgenerated");
else
appendPQExpBufferStr(&buf, ",\n ''::pg_catalog.char AS attgenerated");
attgenerated_col = cols++;
}
if (tableinfo.relkind == RELKIND_INDEX ||
tableinfo.relkind == RELKIND_PARTITIONED_INDEX)
@ -2032,6 +2039,7 @@ describeOneTableDetails(const char *schemaname,
if (show_column_details)
{
char *identity;
char *generated;
char *default_str = "";
printTableAddCell(&cont, PQgetvalue(res, i, attcoll_col), false, false);
@ -2041,16 +2049,19 @@ describeOneTableDetails(const char *schemaname,
false, false);
identity = PQgetvalue(res, i, attidentity_col);
generated = PQgetvalue(res, i, attgenerated_col);
if (!identity[0])
/* (note: above we cut off the 'default' string at 128) */
default_str = PQgetvalue(res, i, attrdef_col);
else if (identity[0] == ATTRIBUTE_IDENTITY_ALWAYS)
if (identity[0] == ATTRIBUTE_IDENTITY_ALWAYS)
default_str = "generated always as identity";
else if (identity[0] == ATTRIBUTE_IDENTITY_BY_DEFAULT)
default_str = "generated by default as identity";
else if (generated[0] == ATTRIBUTE_GENERATED_STORED)
default_str = psprintf("generated always as (%s) stored", PQgetvalue(res, i, attrdef_col));
else
/* (note: above we cut off the 'default' string at 128) */
default_str = PQgetvalue(res, i, attrdef_col);
printTableAddCell(&cont, default_str, false, false);
printTableAddCell(&cont, default_str, false, generated[0] ? true : false);
}
/* Info for index columns */

1
src/include/access/tupdesc.h
View File

@ -42,6 +42,7 @@ typedef struct TupleConstr
uint16 num_defval;
uint16 num_check;
bool has_not_null;
bool has_generated_stored;
} TupleConstr;
/*

2
src/include/catalog/catversion.h
View File

@ -53,6 +53,6 @@
*/
/* yyyymmddN */
#define CATALOG_VERSION_NO 201903291
#define CATALOG_VERSION_NO 201903301
#endif

4
src/include/catalog/heap.h
View File

@ -28,6 +28,7 @@ typedef struct RawColumnDefault
AttrNumber attnum; /* attribute to attach default to */
Node *raw_default; /* default value (untransformed parse tree) */
bool missingMode; /* true if part of add column processing */
char generated; /* attgenerated setting */
} RawColumnDefault;
typedef struct CookedConstraint
@ -120,7 +121,8 @@ extern Node *cookDefault(ParseState *pstate,
Node *raw_default,
Oid atttypid,
int32 atttypmod,
const char *attname);
const char *attname,
char attgenerated);
extern void DeleteRelationTuple(Oid relid);
extern void DeleteAttributeTuples(Oid relid);

5
src/include/catalog/pg_attribute.h
View File

@ -140,6 +140,9 @@ CATALOG(pg_attribute,1249,AttributeRelationId) BKI_BOOTSTRAP BKI_ROWTYPE_OID(75,
/* One of the ATTRIBUTE_IDENTITY_* constants below, or '\0' */
char attidentity BKI_DEFAULT('\0');
/* One of the ATTRIBUTE_GENERATED_* constants below, or '\0' */
char attgenerated BKI_DEFAULT('\0');
/* Is dropped (ie, logically invisible) or not */
bool attisdropped BKI_DEFAULT(f);
@ -201,6 +204,8 @@ typedef FormData_pg_attribute *Form_pg_attribute;
#define ATTRIBUTE_IDENTITY_ALWAYS 'a'
#define ATTRIBUTE_IDENTITY_BY_DEFAULT 'd'
#define ATTRIBUTE_GENERATED_STORED 's'
#endif /* EXPOSE_TO_CLIENT_CODE */
#endif /* PG_ATTRIBUTE_H */

2
src/include/catalog/pg_class.dat
View File

@ -34,7 +34,7 @@
relname => 'pg_attribute', reltype => 'pg_attribute', relam => 'heap',
relfilenode => '0', relpages => '0', reltuples => '0', relallvisible => '0',
reltoastrelid => '0', relhasindex => 'f', relisshared => 'f',
relpersistence => 'p', relkind => 'r', relnatts => '24', relchecks => '0',
relpersistence => 'p', relkind => 'r', relnatts => '25', relchecks => '0',
relhasrules => 'f', relhastriggers => 'f', relhassubclass => 'f',
relrowsecurity => 'f', relforcerowsecurity => 'f', relispopulated => 't',
relreplident => 'n', relispartition => 'f', relfrozenxid => '3',

2
src/include/executor/nodeModifyTable.h
View File

@ -15,6 +15,8 @@
#include "nodes/execnodes.h"
extern void ExecComputeStoredGenerated(EState *estate, TupleTableSlot *slot);
extern ModifyTableState *ExecInitModifyTable(ModifyTable *node, EState *estate, int eflags);
extern void ExecEndModifyTable(ModifyTableState *node);
extern void ExecReScanModifyTable(ModifyTableState *node);

3
src/include/nodes/execnodes.h
View File

@ -452,6 +452,9 @@ typedef struct ResultRelInfo
/* array of constraint-checking expr states */
ExprState **ri_ConstraintExprs;
/* array of stored generated columns expr states */
ExprState **ri_GeneratedExprs;
/* for removing junk attributes from tuples */
JunkFilter *ri_junkFilter;

24
src/include/nodes/parsenodes.h
View File

@ -655,6 +655,7 @@ typedef struct ColumnDef
char identity; /* attidentity setting */
RangeVar *identitySequence; /* to store identity sequence name for
* ALTER TABLE ... ADD COLUMN */
char generated; /* attgenerated setting */
CollateClause *collClause; /* untransformed COLLATE spec, if any */
Oid collOid; /* collation OID (InvalidOid if not set) */
List *constraints; /* other constraints on column */
@ -677,10 +678,11 @@ typedef enum TableLikeOption
CREATE_TABLE_LIKE_COMMENTS = 1 << 0,
CREATE_TABLE_LIKE_CONSTRAINTS = 1 << 1,
CREATE_TABLE_LIKE_DEFAULTS = 1 << 2,
CREATE_TABLE_LIKE_IDENTITY = 1 << 3,
CREATE_TABLE_LIKE_INDEXES = 1 << 4,
CREATE_TABLE_LIKE_STATISTICS = 1 << 5,
CREATE_TABLE_LIKE_STORAGE = 1 << 6,
CREATE_TABLE_LIKE_GENERATED = 1 << 3,
CREATE_TABLE_LIKE_IDENTITY = 1 << 4,
CREATE_TABLE_LIKE_INDEXES = 1 << 5,
CREATE_TABLE_LIKE_STATISTICS = 1 << 6,
CREATE_TABLE_LIKE_STORAGE = 1 << 7,
CREATE_TABLE_LIKE_ALL = PG_INT32_MAX
} TableLikeOption;
@ -933,6 +935,15 @@ typedef struct PartitionCmd
* them in these fields. A whole-row Var reference is represented by
* setting the bit for InvalidAttrNumber.
*
* updatedCols is also used in some other places, for example, to determine
* which triggers to fire and in FDWs to know which changed columns they
* need to ship off. Generated columns that are caused to be updated by an
* update to a base column are collected in extraUpdatedCols. This is not
* considered for permission checking, but it is useful in those places
* that want to know the full set of columns being updated as opposed to
* only the ones the user explicitly mentioned in the query. (There is
* currently no need for an extraInsertedCols, but it could exist.)
*
* securityQuals is a list of security barrier quals (boolean expressions),
* to be tested in the listed order before returning a row from the
* relation. It is always NIL in parser output. Entries are added by the
@ -1087,6 +1098,7 @@ typedef struct RangeTblEntry
Bitmapset *selectedCols; /* columns needing SELECT permission */
Bitmapset *insertedCols; /* columns needing INSERT permission */
Bitmapset *updatedCols; /* columns needing UPDATE permission */
Bitmapset *extraUpdatedCols; /* generated columns being updated */
List *securityQuals; /* security barrier quals to apply, if any */
} RangeTblEntry;
@ -2086,6 +2098,7 @@ typedef enum ConstrType /* types of constraints */
CONSTR_NOTNULL,
CONSTR_DEFAULT,
CONSTR_IDENTITY,
CONSTR_GENERATED,
CONSTR_CHECK,
CONSTR_PRIMARY,
CONSTR_UNIQUE,
@ -2124,7 +2137,8 @@ typedef struct Constraint
bool is_no_inherit; /* is constraint non-inheritable? */
Node *raw_expr; /* expr, as untransformed parse tree */
char *cooked_expr; /* expr, as nodeToString representation */
char generated_when;
char generated_when; /* ALWAYS or BY DEFAULT */
char generated_kind; /* currently always STORED */
/* Fields used for unique constraints (UNIQUE and PRIMARY KEY): */
List *keys; /* String nodes naming referenced key

2
src/include/optimizer/plancat.h
View File

@ -71,4 +71,6 @@ extern double get_function_rows(PlannerInfo *root, Oid funcid, Node *node);
extern bool has_row_triggers(PlannerInfo *root, Index rti, CmdType event);
extern bool has_stored_generated_columns(PlannerInfo *root, Index rti);
#endif /* PLANCAT_H */

1
src/include/parser/kwlist.h
View File

@ -383,6 +383,7 @@ PG_KEYWORD("statistics", STATISTICS, UNRESERVED_KEYWORD)
PG_KEYWORD("stdin", STDIN, UNRESERVED_KEYWORD)
PG_KEYWORD("stdout", STDOUT, UNRESERVED_KEYWORD)
PG_KEYWORD("storage", STORAGE, UNRESERVED_KEYWORD)
PG_KEYWORD("stored", STORED, UNRESERVED_KEYWORD)
PG_KEYWORD("strict", STRICT_P, UNRESERVED_KEYWORD)
PG_KEYWORD("strip", STRIP_P, UNRESERVED_KEYWORD)
PG_KEYWORD("subscription", SUBSCRIPTION, UNRESERVED_KEYWORD)

3
src/include/parser/parse_node.h
View File

@ -71,7 +71,8 @@ typedef enum ParseExprKind
EXPR_KIND_PARTITION_BOUND, /* partition bound expression */
EXPR_KIND_PARTITION_EXPRESSION, /* PARTITION BY expression */
EXPR_KIND_CALL_ARGUMENT, /* procedure argument in CALL */
EXPR_KIND_COPY_WHERE /* WHERE condition in COPY FROM */
EXPR_KIND_COPY_WHERE, /* WHERE condition in COPY FROM */
EXPR_KIND_GENERATED_COLUMN, /* generation expression for a column */
} ParseExprKind;

1
src/include/utils/lsyscache.h
View File

@ -86,6 +86,7 @@ extern Oid get_opfamily_proc(Oid opfamily, Oid lefttype, Oid righttype,
int16 procnum);
extern char *get_attname(Oid relid, AttrNumber attnum, bool missing_ok);
extern AttrNumber get_attnum(Oid relid, const char *attname);
extern char get_attgenerated(Oid relid, AttrNumber attnum);
extern Oid get_atttype(Oid relid, AttrNumber attnum);
extern void get_atttypetypmodcoll(Oid relid, AttrNumber attnum,
Oid *typid, int32 *typmod, Oid *collid);

95
src/pl/plperl/expected/plperl_trigger.out
View File

@ -6,6 +6,10 @@ CREATE TABLE trigger_test (
v varchar,
foo rowcompnest
);
CREATE TABLE trigger_test_generated (
i int,
j int GENERATED ALWAYS AS (i * 2) STORED
);
CREATE OR REPLACE FUNCTION trigger_data() RETURNS trigger LANGUAGE plperl AS $$
# make sure keys are sorted for consistent results - perl no longer
@ -98,6 +102,79 @@ NOTICE: $_TD->{table_name} = 'trigger_test'
NOTICE: $_TD->{table_schema} = 'public'
NOTICE: $_TD->{when} = 'BEFORE'
DROP TRIGGER show_trigger_data_trig on trigger_test;
CREATE TRIGGER show_trigger_data_trig_before
BEFORE INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
CREATE TRIGGER show_trigger_data_trig_after
AFTER INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
insert into trigger_test_generated (i) values (1);
NOTICE: $_TD->{argc} = '0'
NOTICE: $_TD->{event} = 'INSERT'
NOTICE: $_TD->{level} = 'ROW'
NOTICE: $_TD->{name} = 'show_trigger_data_trig_before'
NOTICE: $_TD->{new} = {'i' => '1'}
NOTICE: $_TD->{relid} = 'bogus:12345'
NOTICE: $_TD->{relname} = 'trigger_test_generated'
NOTICE: $_TD->{table_name} = 'trigger_test_generated'
NOTICE: $_TD->{table_schema} = 'public'
NOTICE: $_TD->{when} = 'BEFORE'
NOTICE: $_TD->{argc} = '0'
NOTICE: $_TD->{event} = 'INSERT'
NOTICE: $_TD->{level} = 'ROW'
NOTICE: $_TD->{name} = 'show_trigger_data_trig_after'
NOTICE: $_TD->{new} = {'i' => '1', 'j' => '2'}
NOTICE: $_TD->{relid} = 'bogus:12345'
NOTICE: $_TD->{relname} = 'trigger_test_generated'
NOTICE: $_TD->{table_name} = 'trigger_test_generated'
NOTICE: $_TD->{table_schema} = 'public'
NOTICE: $_TD->{when} = 'AFTER'
update trigger_test_generated set i = 11 where i = 1;
NOTICE: $_TD->{argc} = '0'
NOTICE: $_TD->{event} = 'UPDATE'
NOTICE: $_TD->{level} = 'ROW'
NOTICE: $_TD->{name} = 'show_trigger_data_trig_before'
NOTICE: $_TD->{new} = {'i' => '11'}
NOTICE: $_TD->{old} = {'i' => '1', 'j' => '2'}
NOTICE: $_TD->{relid} = 'bogus:12345'
NOTICE: $_TD->{relname} = 'trigger_test_generated'
NOTICE: $_TD->{table_name} = 'trigger_test_generated'
NOTICE: $_TD->{table_schema} = 'public'
NOTICE: $_TD->{when} = 'BEFORE'
NOTICE: $_TD->{argc} = '0'
NOTICE: $_TD->{event} = 'UPDATE'
NOTICE: $_TD->{level} = 'ROW'
NOTICE: $_TD->{name} = 'show_trigger_data_trig_after'
NOTICE: $_TD->{new} = {'i' => '11', 'j' => '22'}
NOTICE: $_TD->{old} = {'i' => '1', 'j' => '2'}
NOTICE: $_TD->{relid} = 'bogus:12345'
NOTICE: $_TD->{relname} = 'trigger_test_generated'
NOTICE: $_TD->{table_name} = 'trigger_test_generated'
NOTICE: $_TD->{table_schema} = 'public'
NOTICE: $_TD->{when} = 'AFTER'
delete from trigger_test_generated;
NOTICE: $_TD->{argc} = '0'
NOTICE: $_TD->{event} = 'DELETE'
NOTICE: $_TD->{level} = 'ROW'
NOTICE: $_TD->{name} = 'show_trigger_data_trig_before'
NOTICE: $_TD->{old} = {'i' => '11', 'j' => '22'}
NOTICE: $_TD->{relid} = 'bogus:12345'
NOTICE: $_TD->{relname} = 'trigger_test_generated'
NOTICE: $_TD->{table_name} = 'trigger_test_generated'
NOTICE: $_TD->{table_schema} = 'public'
NOTICE: $_TD->{when} = 'BEFORE'
NOTICE: $_TD->{argc} = '0'
NOTICE: $_TD->{event} = 'DELETE'
NOTICE: $_TD->{level} = 'ROW'
NOTICE: $_TD->{name} = 'show_trigger_data_trig_after'
NOTICE: $_TD->{old} = {'i' => '11', 'j' => '22'}
NOTICE: $_TD->{relid} = 'bogus:12345'
NOTICE: $_TD->{relname} = 'trigger_test_generated'
NOTICE: $_TD->{table_name} = 'trigger_test_generated'
NOTICE: $_TD->{table_schema} = 'public'
NOTICE: $_TD->{when} = 'AFTER'
DROP TRIGGER show_trigger_data_trig_before ON trigger_test_generated;
DROP TRIGGER show_trigger_data_trig_after ON trigger_test_generated;
insert into trigger_test values(1,'insert', '("(1)")');
CREATE VIEW trigger_test_view AS SELECT * FROM trigger_test;
CREATE TRIGGER show_trigger_data_trig
@ -295,3 +372,21 @@ NOTICE: perlsnitch: ddl_command_start DROP TABLE
NOTICE: perlsnitch: ddl_command_end DROP TABLE
drop event trigger perl_a_snitch;
drop event trigger perl_b_snitch;
-- dealing with generated columns
CREATE FUNCTION generated_test_func1() RETURNS trigger
LANGUAGE plperl
AS $$
$_TD->{new}{j} = 5; # not allowed
return 'MODIFY';
$$;
CREATE TRIGGER generated_test_trigger1 BEFORE INSERT ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE generated_test_func1();
TRUNCATE trigger_test_generated;
INSERT INTO trigger_test_generated (i) VALUES (1);
ERROR: cannot set generated column "j"
CONTEXT: PL/Perl function "generated_test_func1"
SELECT * FROM trigger_test_generated;
i | j
---+---
(0 rows)

40
src/pl/plperl/plperl.c
View File

@ -266,7 +266,7 @@ static plperl_proc_desc *compile_plperl_function(Oid fn_oid,
bool is_trigger,
bool is_event_trigger);
static SV *plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc);
static SV *plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated);
static SV *plperl_hash_from_datum(Datum attr);
static SV *plperl_ref_from_pg_array(Datum arg, Oid typid);
static SV *split_array(plperl_array_info *info, int first, int last, int nest);
@ -1644,13 +1644,19 @@ plperl_trigger_build_args(FunctionCallInfo fcinfo)
hv_store_string(hv, "name", cstr2sv(tdata->tg_trigger->tgname));
hv_store_string(hv, "relid", cstr2sv(relid));
/*
* Note: In BEFORE trigger, stored generated columns are not computed yet,
* so don't make them accessible in NEW row.
*/
if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event))
{
event = "INSERT";
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
hv_store_string(hv, "new",
plperl_hash_from_tuple(tdata->tg_trigtuple,
tupdesc));
tupdesc,
!TRIGGER_FIRED_BEFORE(tdata->tg_event)));
}
else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
{
@ -1658,7 +1664,8 @@ plperl_trigger_build_args(FunctionCallInfo fcinfo)
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
hv_store_string(hv, "old",
plperl_hash_from_tuple(tdata->tg_trigtuple,
tupdesc));
tupdesc,
true));
}
else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
{
@ -1667,10 +1674,12 @@ plperl_trigger_build_args(FunctionCallInfo fcinfo)
{
hv_store_string(hv, "old",
plperl_hash_from_tuple(tdata->tg_trigtuple,
tupdesc));
tupdesc,
true));
hv_store_string(hv, "new",
plperl_hash_from_tuple(tdata->tg_newtuple,
tupdesc));
tupdesc,
!TRIGGER_FIRED_BEFORE(tdata->tg_event)));
}
}
else if (TRIGGER_FIRED_BY_TRUNCATE(tdata->tg_event))
@ -1791,6 +1800,11 @@ plperl_modify_tuple(HV *hvTD, TriggerData *tdata, HeapTuple otup)
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot set system attribute \"%s\"",
key)));
if (attr->attgenerated)
ereport(ERROR,
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
errmsg("cannot set generated column \"%s\"",
key)));
modvalues[attn - 1] = plperl_sv_to_datum(val,
attr->atttypid,
@ -3012,7 +3026,7 @@ plperl_hash_from_datum(Datum attr)
tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
tmptup.t_data = td;
sv = plperl_hash_from_tuple(&tmptup, tupdesc);
sv = plperl_hash_from_tuple(&tmptup, tupdesc, true);
ReleaseTupleDesc(tupdesc);
return sv;
@ -3020,7 +3034,7 @@ plperl_hash_from_datum(Datum attr)
/* Build a hash from all attributes of a given tuple. */
static SV *
plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc)
plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated)
{
dTHX;
HV *hv;
@ -3044,6 +3058,13 @@ plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc)
if (att->attisdropped)
continue;
if (att->attgenerated)
{
/* don't include unless requested */
if (!include_generated)
continue;
}
attname = NameStr(att->attname);
attr = heap_getattr(tuple, i + 1, tupdesc, &isnull);
@ -3198,7 +3219,7 @@ plperl_spi_execute_fetch_result(SPITupleTable *tuptable, uint64 processed,
av_extend(rows, processed);
for (i = 0; i < processed; i++)
{
row = plperl_hash_from_tuple(tuptable->vals[i], tuptable->tupdesc);
row = plperl_hash_from_tuple(tuptable->vals[i], tuptable->tupdesc, true);
av_push(rows, row);
}
hv_store_string(result, "rows",
@ -3484,7 +3505,8 @@ plperl_spi_fetchrow(char *cursor)
else
{
row = plperl_hash_from_tuple(SPI_tuptable->vals[0],
SPI_tuptable->tupdesc);
SPI_tuptable->tupdesc,
true);
}
SPI_freetuptable(SPI_tuptable);
}

36
src/pl/plperl/sql/plperl_trigger.sql
View File

@ -8,6 +8,11 @@ CREATE TABLE trigger_test (
foo rowcompnest
);
CREATE TABLE trigger_test_generated (
i int,
j int GENERATED ALWAYS AS (i * 2) STORED
);
CREATE OR REPLACE FUNCTION trigger_data() RETURNS trigger LANGUAGE plperl AS $$
# make sure keys are sorted for consistent results - perl no longer
@ -70,6 +75,21 @@ delete from trigger_test;
DROP TRIGGER show_trigger_data_trig on trigger_test;
CREATE TRIGGER show_trigger_data_trig_before
BEFORE INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
CREATE TRIGGER show_trigger_data_trig_after
AFTER INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
insert into trigger_test_generated (i) values (1);
update trigger_test_generated set i = 11 where i = 1;
delete from trigger_test_generated;
DROP TRIGGER show_trigger_data_trig_before ON trigger_test_generated;
DROP TRIGGER show_trigger_data_trig_after ON trigger_test_generated;
insert into trigger_test values(1,'insert', '("(1)")');
CREATE VIEW trigger_test_view AS SELECT * FROM trigger_test;
@ -221,3 +241,19 @@ drop table foo;
drop event trigger perl_a_snitch;
drop event trigger perl_b_snitch;
-- dealing with generated columns
CREATE FUNCTION generated_test_func1() RETURNS trigger
LANGUAGE plperl
AS $$
$_TD->{new}{j} = 5; # not allowed
return 'MODIFY';
$$;
CREATE TRIGGER generated_test_trigger1 BEFORE INSERT ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE generated_test_func1();
TRUNCATE trigger_test_generated;
INSERT INTO trigger_test_generated (i) VALUES (1);
SELECT * FROM trigger_test_generated;

20
src/pl/plpgsql/src/pl_exec.c
View File

@ -924,6 +924,26 @@ plpgsql_exec_trigger(PLpgSQL_function *func,
false, false);
expanded_record_set_tuple(rec_old->erh, trigdata->tg_trigtuple,
false, false);
/*
* In BEFORE trigger, stored generated columns are not computed yet,
* so make them null in the NEW row. (Only needed in UPDATE branch;
* in the INSERT case, they are already null, but in UPDATE, the field
* still contains the old value.) Alternatively, we could construct a
* whole new row structure without the generated columns, but this way
* seems more efficient and potentially less confusing.
*/
if (tupdesc->constr && tupdesc->constr->has_generated_stored &&
TRIGGER_FIRED_BEFORE(trigdata->tg_event))
{
for (int i = 0; i < tupdesc->natts; i++)
if (TupleDescAttr(tupdesc, i)->attgenerated == ATTRIBUTE_GENERATED_STORED)
expanded_record_set_field_internal(rec_new->erh,
i + 1,
(Datum) 0,
true, /*isnull*/
false, false);
}
}
else if (TRIGGER_FIRED_BY_DELETE(trigdata->tg_event))
{

94
src/pl/plpython/expected/plpython_trigger.out
View File

@ -67,6 +67,10 @@ SELECT * FROM users;
-- dump trigger data
CREATE TABLE trigger_test
(i int, v text );
CREATE TABLE trigger_test_generated (
i int,
j int GENERATED ALWAYS AS (i * 2) STORED
);
CREATE FUNCTION trigger_data() RETURNS trigger LANGUAGE plpythonu AS $$
if 'relid' in TD:
@ -203,6 +207,77 @@ NOTICE: TD[when] => BEFORE
DROP TRIGGER show_trigger_data_trig_stmt on trigger_test;
DROP TRIGGER show_trigger_data_trig_before on trigger_test;
DROP TRIGGER show_trigger_data_trig_after on trigger_test;
CREATE TRIGGER show_trigger_data_trig_before
BEFORE INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
CREATE TRIGGER show_trigger_data_trig_after
AFTER INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
insert into trigger_test_generated (i) values (1);
NOTICE: TD[args] => None
NOTICE: TD[event] => INSERT
NOTICE: TD[level] => ROW
NOTICE: TD[name] => show_trigger_data_trig_before
NOTICE: TD[new] => {'i': 1}
NOTICE: TD[old] => None
NOTICE: TD[relid] => bogus:12345
NOTICE: TD[table_name] => trigger_test_generated
NOTICE: TD[table_schema] => public
NOTICE: TD[when] => BEFORE
NOTICE: TD[args] => None
NOTICE: TD[event] => INSERT
NOTICE: TD[level] => ROW
NOTICE: TD[name] => show_trigger_data_trig_after
NOTICE: TD[new] => {'i': 1, 'j': 2}
NOTICE: TD[old] => None
NOTICE: TD[relid] => bogus:12345
NOTICE: TD[table_name] => trigger_test_generated
NOTICE: TD[table_schema] => public
NOTICE: TD[when] => AFTER
update trigger_test_generated set i = 11 where i = 1;
NOTICE: TD[args] => None
NOTICE: TD[event] => UPDATE
NOTICE: TD[level] => ROW
NOTICE: TD[name] => show_trigger_data_trig_before
NOTICE: TD[new] => {'i': 11}
NOTICE: TD[old] => {'i': 1, 'j': 2}
NOTICE: TD[relid] => bogus:12345
NOTICE: TD[table_name] => trigger_test_generated
NOTICE: TD[table_schema] => public
NOTICE: TD[when] => BEFORE
NOTICE: TD[args] => None
NOTICE: TD[event] => UPDATE
NOTICE: TD[level] => ROW
NOTICE: TD[name] => show_trigger_data_trig_after
NOTICE: TD[new] => {'i': 11, 'j': 22}
NOTICE: TD[old] => {'i': 1, 'j': 2}
NOTICE: TD[relid] => bogus:12345
NOTICE: TD[table_name] => trigger_test_generated
NOTICE: TD[table_schema] => public
NOTICE: TD[when] => AFTER
delete from trigger_test_generated;
NOTICE: TD[args] => None
NOTICE: TD[event] => DELETE
NOTICE: TD[level] => ROW
NOTICE: TD[name] => show_trigger_data_trig_before
NOTICE: TD[new] => None
NOTICE: TD[old] => {'i': 11, 'j': 22}
NOTICE: TD[relid] => bogus:12345
NOTICE: TD[table_name] => trigger_test_generated
NOTICE: TD[table_schema] => public
NOTICE: TD[when] => BEFORE
NOTICE: TD[args] => None
NOTICE: TD[event] => DELETE
NOTICE: TD[level] => ROW
NOTICE: TD[name] => show_trigger_data_trig_after
NOTICE: TD[new] => None
NOTICE: TD[old] => {'i': 11, 'j': 22}
NOTICE: TD[relid] => bogus:12345
NOTICE: TD[table_name] => trigger_test_generated
NOTICE: TD[table_schema] => public
NOTICE: TD[when] => AFTER
DROP TRIGGER show_trigger_data_trig_before ON trigger_test_generated;
DROP TRIGGER show_trigger_data_trig_after ON trigger_test_generated;
insert into trigger_test values(1,'insert');
CREATE VIEW trigger_test_view AS SELECT * FROM trigger_test;
CREATE TRIGGER show_trigger_data_trig
@ -524,3 +599,22 @@ INFO: old: 1 -> a
INFO: new: 1 -> b
DROP TABLE transition_table_test;
DROP FUNCTION transition_table_test_f();
-- dealing with generated columns
CREATE FUNCTION generated_test_func1() RETURNS trigger
LANGUAGE plpythonu
AS $$
TD['new']['j'] = 5 # not allowed
return 'MODIFY'
$$;
CREATE TRIGGER generated_test_trigger1 BEFORE INSERT ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE generated_test_func1();
TRUNCATE trigger_test_generated;
INSERT INTO trigger_test_generated (i) VALUES (1);
ERROR: cannot set generated column "j"
CONTEXT: while modifying trigger row
PL/Python function "generated_test_func1"
SELECT * FROM trigger_test_generated;
i | j
---+---
(0 rows)

5
src/pl/plpython/plpy_cursorobject.c
View File

@ -357,7 +357,7 @@ PLy_cursor_iternext(PyObject *self)
exec_ctx->curr_proc);
ret = PLy_input_from_tuple(&cursor->result, SPI_tuptable->vals[0],
SPI_tuptable->tupdesc);
SPI_tuptable->tupdesc, true);
}
SPI_freetuptable(SPI_tuptable);
@ -453,7 +453,8 @@ PLy_cursor_fetch(PyObject *self, PyObject *args)
{
PyObject *row = PLy_input_from_tuple(&cursor->result,
SPI_tuptable->vals[i],
SPI_tuptable->tupdesc);
SPI_tuptable->tupdesc,
true);
PyList_SetItem(ret->rows, i, row);
}

23
src/pl/plpython/plpy_exec.c
View File

@ -13,6 +13,7 @@
#include "executor/spi.h"
#include "funcapi.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
#include "utils/typcache.h"
@ -751,6 +752,11 @@ PLy_trigger_build_args(FunctionCallInfo fcinfo, PLyProcedure *proc, HeapTuple *r
PyDict_SetItemString(pltdata, "level", pltlevel);
Py_DECREF(pltlevel);
/*
* Note: In BEFORE trigger, stored generated columns are not computed yet,
* so don't make them accessible in NEW row.
*/
if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event))
{
pltevent = PyString_FromString("INSERT");
@ -758,7 +764,8 @@ PLy_trigger_build_args(FunctionCallInfo fcinfo, PLyProcedure *proc, HeapTuple *r
PyDict_SetItemString(pltdata, "old", Py_None);
pytnew = PLy_input_from_tuple(&proc->result_in,
tdata->tg_trigtuple,
rel_descr);
rel_descr,
!TRIGGER_FIRED_BEFORE(tdata->tg_event));
PyDict_SetItemString(pltdata, "new", pytnew);
Py_DECREF(pytnew);
*rv = tdata->tg_trigtuple;
@ -770,7 +777,8 @@ PLy_trigger_build_args(FunctionCallInfo fcinfo, PLyProcedure *proc, HeapTuple *r
PyDict_SetItemString(pltdata, "new", Py_None);
pytold = PLy_input_from_tuple(&proc->result_in,
tdata->tg_trigtuple,
rel_descr);
rel_descr,
true);
PyDict_SetItemString(pltdata, "old", pytold);
Py_DECREF(pytold);
*rv = tdata->tg_trigtuple;
@ -781,12 +789,14 @@ PLy_trigger_build_args(FunctionCallInfo fcinfo, PLyProcedure *proc, HeapTuple *r
pytnew = PLy_input_from_tuple(&proc->result_in,
tdata->tg_newtuple,
rel_descr);
rel_descr,
!TRIGGER_FIRED_BEFORE(tdata->tg_event));
PyDict_SetItemString(pltdata, "new", pytnew);
Py_DECREF(pytnew);
pytold = PLy_input_from_tuple(&proc->result_in,
tdata->tg_trigtuple,
rel_descr);
rel_descr,
true);
PyDict_SetItemString(pltdata, "old", pytold);
Py_DECREF(pytold);
*rv = tdata->tg_newtuple;
@ -952,6 +962,11 @@ PLy_modify_tuple(PLyProcedure *proc, PyObject *pltd, TriggerData *tdata,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot set system attribute \"%s\"",
plattstr)));
if (TupleDescAttr(tupdesc, attn - 1)->attgenerated)
ereport(ERROR,
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
errmsg("cannot set generated column \"%s\"",
plattstr)));
plval = PyDict_GetItem(plntup, platt);
if (plval == NULL)

3
src/pl/plpython/plpy_spi.c
View File

@ -419,7 +419,8 @@ PLy_spi_execute_fetch_result(SPITupleTable *tuptable, uint64 rows, int status)
{
PyObject *row = PLy_input_from_tuple(&ininfo,
tuptable->vals[i],
tuptable->tupdesc);
tuptable->tupdesc,
true);
PyList_SetItem(result->rows, i, row);
}

17
src/pl/plpython/plpy_typeio.c
View File

@ -41,7 +41,7 @@ static PyObject *PLyList_FromArray(PLyDatumToOb *arg, Datum d);
static PyObject *PLyList_FromArray_recurse(PLyDatumToOb *elm, int *dims, int ndim, int dim,
char **dataptr_p, bits8 **bitmap_p, int *bitmask_p);
static PyObject *PLyDict_FromComposite(PLyDatumToOb *arg, Datum d);
static PyObject *PLyDict_FromTuple(PLyDatumToOb *arg, HeapTuple tuple, TupleDesc desc);
static PyObject *PLyDict_FromTuple(PLyDatumToOb *arg, HeapTuple tuple, TupleDesc desc, bool include_generated);
/* conversion from Python objects to Datums */
static Datum PLyObject_ToBool(PLyObToDatum *arg, PyObject *plrv,
@ -134,7 +134,7 @@ PLy_output_convert(PLyObToDatum *arg, PyObject *val, bool *isnull)
* but in practice all callers have the right tupdesc available.
*/
PyObject *
PLy_input_from_tuple(PLyDatumToOb *arg, HeapTuple tuple, TupleDesc desc)
PLy_input_from_tuple(PLyDatumToOb *arg, HeapTuple tuple, TupleDesc desc, bool include_generated)
{
PyObject *dict;
PLyExecutionContext *exec_ctx = PLy_current_execution_context();
@ -148,7 +148,7 @@ PLy_input_from_tuple(PLyDatumToOb *arg, HeapTuple tuple, TupleDesc desc)
oldcontext = MemoryContextSwitchTo(scratch_context);
dict = PLyDict_FromTuple(arg, tuple, desc);
dict = PLyDict_FromTuple(arg, tuple, desc, include_generated);
MemoryContextSwitchTo(oldcontext);
@ -804,7 +804,7 @@ PLyDict_FromComposite(PLyDatumToOb *arg, Datum d)
tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
tmptup.t_data = td;
dict = PLyDict_FromTuple(arg, &tmptup, tupdesc);
dict = PLyDict_FromTuple(arg, &tmptup, tupdesc, true);
ReleaseTupleDesc(tupdesc);
@ -815,7 +815,7 @@ PLyDict_FromComposite(PLyDatumToOb *arg, Datum d)
* Transform a tuple into a Python dict object.
*/
static PyObject *
PLyDict_FromTuple(PLyDatumToOb *arg, HeapTuple tuple, TupleDesc desc)
PLyDict_FromTuple(PLyDatumToOb *arg, HeapTuple tuple, TupleDesc desc, bool include_generated)
{
PyObject *volatile dict;
@ -842,6 +842,13 @@ PLyDict_FromTuple(PLyDatumToOb *arg, HeapTuple tuple, TupleDesc desc)
if (attr->attisdropped)
continue;
if (attr->attgenerated)
{
/* don't include unless requested */
if (!include_generated)
continue;
}
key = NameStr(attr->attname);
vattr = heap_getattr(tuple, (i + 1), desc, &is_null);

2
src/pl/plpython/plpy_typeio.h
View File

@ -151,7 +151,7 @@ extern Datum PLy_output_convert(PLyObToDatum *arg, PyObject *val,
bool *isnull);
extern PyObject *PLy_input_from_tuple(PLyDatumToOb *arg, HeapTuple tuple,
TupleDesc desc);
TupleDesc desc, bool include_generated);
extern void PLy_input_setup_func(PLyDatumToOb *arg, MemoryContext arg_mcxt,
Oid typeOid, int32 typmod,

37
src/pl/plpython/sql/plpython_trigger.sql
View File

@ -67,6 +67,11 @@ SELECT * FROM users;
CREATE TABLE trigger_test
(i int, v text );
CREATE TABLE trigger_test_generated (
i int,
j int GENERATED ALWAYS AS (i * 2) STORED
);
CREATE FUNCTION trigger_data() RETURNS trigger LANGUAGE plpythonu AS $$
if 'relid' in TD:
@ -109,6 +114,21 @@ DROP TRIGGER show_trigger_data_trig_stmt on trigger_test;
DROP TRIGGER show_trigger_data_trig_before on trigger_test;
DROP TRIGGER show_trigger_data_trig_after on trigger_test;
CREATE TRIGGER show_trigger_data_trig_before
BEFORE INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
CREATE TRIGGER show_trigger_data_trig_after
AFTER INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
insert into trigger_test_generated (i) values (1);
update trigger_test_generated set i = 11 where i = 1;
delete from trigger_test_generated;
DROP TRIGGER show_trigger_data_trig_before ON trigger_test_generated;
DROP TRIGGER show_trigger_data_trig_after ON trigger_test_generated;
insert into trigger_test values(1,'insert');
CREATE VIEW trigger_test_view AS SELECT * FROM trigger_test;
@ -430,3 +450,20 @@ UPDATE transition_table_test SET name = 'b';
DROP TABLE transition_table_test;
DROP FUNCTION transition_table_test_f();
-- dealing with generated columns
CREATE FUNCTION generated_test_func1() RETURNS trigger
LANGUAGE plpythonu
AS $$
TD['new']['j'] = 5 # not allowed
return 'MODIFY'
$$;
CREATE TRIGGER generated_test_trigger1 BEFORE INSERT ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE generated_test_func1();
TRUNCATE trigger_test_generated;
INSERT INTO trigger_test_generated (i) VALUES (1);
SELECT * FROM trigger_test_generated;

99
src/pl/tcl/expected/pltcl_trigger.out
View File

@ -61,6 +61,10 @@ CREATE TABLE trigger_test (
);
-- Make certain dropped attributes are handled correctly
ALTER TABLE trigger_test DROP dropme;
CREATE TABLE trigger_test_generated (
i int,
j int GENERATED ALWAYS AS (i * 2) STORED
);
CREATE VIEW trigger_test_view AS SELECT i, v FROM trigger_test;
CREATE FUNCTION trigger_data() returns trigger language pltcl as $_$
if {$TG_table_name eq "trigger_test" && $TG_level eq "ROW" && $TG_op ne "DELETE"} {
@ -112,6 +116,12 @@ FOR EACH ROW EXECUTE PROCEDURE trigger_data(23,'skidoo');
CREATE TRIGGER statement_trigger
BEFORE INSERT OR UPDATE OR DELETE OR TRUNCATE ON trigger_test
FOR EACH STATEMENT EXECUTE PROCEDURE trigger_data(42,'statement trigger');
CREATE TRIGGER show_trigger_data_trig_before
BEFORE INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
CREATE TRIGGER show_trigger_data_trig_after
AFTER INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
CREATE TRIGGER show_trigger_data_view_trig
INSTEAD OF INSERT OR UPDATE OR DELETE ON trigger_test_view
FOR EACH ROW EXECUTE PROCEDURE trigger_data(24,'skidoo view');
@ -631,6 +641,75 @@ NOTICE: TG_table_name: trigger_test
NOTICE: TG_table_schema: public
NOTICE: TG_when: BEFORE
NOTICE: args: {23 skidoo}
insert into trigger_test_generated (i) values (1);
NOTICE: NEW: {i: 1}
NOTICE: OLD: {}
NOTICE: TG_level: ROW
NOTICE: TG_name: show_trigger_data_trig_before
NOTICE: TG_op: INSERT
NOTICE: TG_relatts: {{} i j}
NOTICE: TG_relid: bogus:12345
NOTICE: TG_table_name: trigger_test_generated
NOTICE: TG_table_schema: public
NOTICE: TG_when: BEFORE
NOTICE: args: {}
NOTICE: NEW: {i: 1, j: 2}
NOTICE: OLD: {}
NOTICE: TG_level: ROW
NOTICE: TG_name: show_trigger_data_trig_after
NOTICE: TG_op: INSERT
NOTICE: TG_relatts: {{} i j}
NOTICE: TG_relid: bogus:12345
NOTICE: TG_table_name: trigger_test_generated
NOTICE: TG_table_schema: public
NOTICE: TG_when: AFTER
NOTICE: args: {}
update trigger_test_generated set i = 11 where i = 1;
NOTICE: NEW: {i: 11}
NOTICE: OLD: {i: 1, j: 2}
NOTICE: TG_level: ROW
NOTICE: TG_name: show_trigger_data_trig_before
NOTICE: TG_op: UPDATE
NOTICE: TG_relatts: {{} i j}
NOTICE: TG_relid: bogus:12345
NOTICE: TG_table_name: trigger_test_generated
NOTICE: TG_table_schema: public
NOTICE: TG_when: BEFORE
NOTICE: args: {}
NOTICE: NEW: {i: 11, j: 22}
NOTICE: OLD: {i: 1, j: 2}
NOTICE: TG_level: ROW
NOTICE: TG_name: show_trigger_data_trig_after
NOTICE: TG_op: UPDATE
NOTICE: TG_relatts: {{} i j}
NOTICE: TG_relid: bogus:12345
NOTICE: TG_table_name: trigger_test_generated
NOTICE: TG_table_schema: public
NOTICE: TG_when: AFTER
NOTICE: args: {}
delete from trigger_test_generated;
NOTICE: NEW: {}
NOTICE: OLD: {i: 11, j: 22}
NOTICE: TG_level: ROW
NOTICE: TG_name: show_trigger_data_trig_before
NOTICE: TG_op: DELETE
NOTICE: TG_relatts: {{} i j}
NOTICE: TG_relid: bogus:12345
NOTICE: TG_table_name: trigger_test_generated
NOTICE: TG_table_schema: public
NOTICE: TG_when: BEFORE
NOTICE: args: {}
NOTICE: NEW: {}
NOTICE: OLD: {i: 11, j: 22}
NOTICE: TG_level: ROW
NOTICE: TG_name: show_trigger_data_trig_after
NOTICE: TG_op: DELETE
NOTICE: TG_relatts: {{} i j}
NOTICE: TG_relid: bogus:12345
NOTICE: TG_table_name: trigger_test_generated
NOTICE: TG_table_schema: public
NOTICE: TG_when: AFTER
NOTICE: args: {}
insert into trigger_test_view values(2,'insert');
NOTICE: NEW: {i: 2, v: insert}
NOTICE: OLD: {}
@ -738,6 +817,8 @@ NOTICE: TG_table_name: trigger_test
NOTICE: TG_table_schema: public
NOTICE: TG_when: BEFORE
NOTICE: args: {42 {statement trigger}}
DROP TRIGGER show_trigger_data_trig_before ON trigger_test_generated;
DROP TRIGGER show_trigger_data_trig_after ON trigger_test_generated;
-- should error
insert into trigger_test(test_argisnull) values(true);
NOTICE: NEW: {}
@ -787,3 +868,21 @@ INFO: old: 1 -> a
INFO: new: 1 -> b
drop table transition_table_test;
drop function transition_table_test_f();
-- dealing with generated columns
CREATE FUNCTION generated_test_func1() RETURNS trigger
LANGUAGE pltcl
AS $$
# not allowed
set NEW(j) 5
return [array get NEW]
$$;
CREATE TRIGGER generated_test_trigger1 BEFORE INSERT ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE generated_test_func1();
TRUNCATE trigger_test_generated;
INSERT INTO trigger_test_generated (i) VALUES (1);
ERROR: cannot set generated column "j"
SELECT * FROM trigger_test_generated;
i | j
---+---
(0 rows)

50
src/pl/tcl/pltcl.c
View File

@ -324,7 +324,7 @@ static void pltcl_subtrans_abort(Tcl_Interp *interp,
static void pltcl_set_tuple_values(Tcl_Interp *interp, const char *arrayname,
uint64 tupno, HeapTuple tuple, TupleDesc tupdesc);
static Tcl_Obj *pltcl_build_tuple_argument(HeapTuple tuple, TupleDesc tupdesc);
static Tcl_Obj *pltcl_build_tuple_argument(HeapTuple tuple, TupleDesc tupdesc, bool include_generated);
static HeapTuple pltcl_build_tuple_result(Tcl_Interp *interp,
Tcl_Obj **kvObjv, int kvObjc,
pltcl_call_state *call_state);
@ -889,7 +889,7 @@ pltcl_func_handler(PG_FUNCTION_ARGS, pltcl_call_state *call_state,
tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
tmptup.t_data = td;
list_tmp = pltcl_build_tuple_argument(&tmptup, tupdesc);
list_tmp = pltcl_build_tuple_argument(&tmptup, tupdesc, true);
Tcl_ListObjAppendElement(NULL, tcl_cmd, list_tmp);
ReleaseTupleDesc(tupdesc);
@ -1060,7 +1060,6 @@ pltcl_trigger_handler(PG_FUNCTION_ARGS, pltcl_call_state *call_state,
volatile HeapTuple rettup;
Tcl_Obj *tcl_cmd;
Tcl_Obj *tcl_trigtup;
Tcl_Obj *tcl_newtup;
int tcl_rc;
int i;
const char *result;
@ -1162,20 +1161,22 @@ pltcl_trigger_handler(PG_FUNCTION_ARGS, pltcl_call_state *call_state,
Tcl_ListObjAppendElement(NULL, tcl_cmd,
Tcl_NewStringObj("ROW", -1));
/* Build the data list for the trigtuple */
tcl_trigtup = pltcl_build_tuple_argument(trigdata->tg_trigtuple,
tupdesc);
/*
* Now the command part of the event for TG_op and data for NEW
* and OLD
*
* Note: In BEFORE trigger, stored generated columns are not computed yet,
* so don't make them accessible in NEW row.
*/
if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
{
Tcl_ListObjAppendElement(NULL, tcl_cmd,
Tcl_NewStringObj("INSERT", -1));
Tcl_ListObjAppendElement(NULL, tcl_cmd, tcl_trigtup);
Tcl_ListObjAppendElement(NULL, tcl_cmd,
pltcl_build_tuple_argument(trigdata->tg_trigtuple,
tupdesc,
!TRIGGER_FIRED_BEFORE(trigdata->tg_event)));
Tcl_ListObjAppendElement(NULL, tcl_cmd, Tcl_NewObj());
rettup = trigdata->tg_trigtuple;
@ -1186,7 +1187,10 @@ pltcl_trigger_handler(PG_FUNCTION_ARGS, pltcl_call_state *call_state,
Tcl_NewStringObj("DELETE", -1));
Tcl_ListObjAppendElement(NULL, tcl_cmd, Tcl_NewObj());
Tcl_ListObjAppendElement(NULL, tcl_cmd, tcl_trigtup);
Tcl_ListObjAppendElement(NULL, tcl_cmd,
pltcl_build_tuple_argument(trigdata->tg_trigtuple,
tupdesc,
true));
rettup = trigdata->tg_trigtuple;
}
@ -1195,11 +1199,14 @@ pltcl_trigger_handler(PG_FUNCTION_ARGS, pltcl_call_state *call_state,
Tcl_ListObjAppendElement(NULL, tcl_cmd,
Tcl_NewStringObj("UPDATE", -1));
tcl_newtup = pltcl_build_tuple_argument(trigdata->tg_newtuple,
tupdesc);
Tcl_ListObjAppendElement(NULL, tcl_cmd, tcl_newtup);
Tcl_ListObjAppendElement(NULL, tcl_cmd, tcl_trigtup);
Tcl_ListObjAppendElement(NULL, tcl_cmd,
pltcl_build_tuple_argument(trigdata->tg_newtuple,
tupdesc,
!TRIGGER_FIRED_BEFORE(trigdata->tg_event)));
Tcl_ListObjAppendElement(NULL, tcl_cmd,
pltcl_build_tuple_argument(trigdata->tg_trigtuple,
tupdesc,
true));
rettup = trigdata->tg_newtuple;
}
@ -3091,7 +3098,7 @@ pltcl_set_tuple_values(Tcl_Interp *interp, const char *arrayname,
* from all attributes of a given tuple
**********************************************************************/
static Tcl_Obj *
pltcl_build_tuple_argument(HeapTuple tuple, TupleDesc tupdesc)
pltcl_build_tuple_argument(HeapTuple tuple, TupleDesc tupdesc, bool include_generated)
{
Tcl_Obj *retobj = Tcl_NewObj();
int i;
@ -3110,6 +3117,13 @@ pltcl_build_tuple_argument(HeapTuple tuple, TupleDesc tupdesc)
if (att->attisdropped)
continue;
if (att->attgenerated)
{
/* don't include unless requested */
if (!include_generated)
continue;
}
/************************************************************
* Get the attribute name
************************************************************/
@ -3219,6 +3233,12 @@ pltcl_build_tuple_result(Tcl_Interp *interp, Tcl_Obj **kvObjv, int kvObjc,
errmsg("cannot set system attribute \"%s\"",
fieldName)));
if (TupleDescAttr(tupdesc, attn - 1)->attgenerated)
ereport(ERROR,
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
errmsg("cannot set generated column \"%s\"",
fieldName)));
values[attn - 1] = utf_u2e(Tcl_GetString(kvObjv[i + 1]));
}

36
src/pl/tcl/sql/pltcl_trigger.sql
View File

@ -71,6 +71,11 @@ CREATE TABLE trigger_test (
-- Make certain dropped attributes are handled correctly
ALTER TABLE trigger_test DROP dropme;
CREATE TABLE trigger_test_generated (
i int,
j int GENERATED ALWAYS AS (i * 2) STORED
);
CREATE VIEW trigger_test_view AS SELECT i, v FROM trigger_test;
CREATE FUNCTION trigger_data() returns trigger language pltcl as $_$
@ -125,6 +130,13 @@ CREATE TRIGGER statement_trigger
BEFORE INSERT OR UPDATE OR DELETE OR TRUNCATE ON trigger_test
FOR EACH STATEMENT EXECUTE PROCEDURE trigger_data(42,'statement trigger');
CREATE TRIGGER show_trigger_data_trig_before
BEFORE INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
CREATE TRIGGER show_trigger_data_trig_after
AFTER INSERT OR UPDATE OR DELETE ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE trigger_data();
CREATE TRIGGER show_trigger_data_view_trig
INSTEAD OF INSERT OR UPDATE OR DELETE ON trigger_test_view
FOR EACH ROW EXECUTE PROCEDURE trigger_data(24,'skidoo view');
@ -531,6 +543,10 @@ select * from T_pkey2 order by key1 using @<, key2 collate "C";
-- show dump of trigger data
insert into trigger_test values(1,'insert');
insert into trigger_test_generated (i) values (1);
update trigger_test_generated set i = 11 where i = 1;
delete from trigger_test_generated;
insert into trigger_test_view values(2,'insert');
update trigger_test_view set v = 'update' where i=1;
delete from trigger_test_view;
@ -540,6 +556,9 @@ update trigger_test set v = 'update' where i = 1;
delete from trigger_test;
truncate trigger_test;
DROP TRIGGER show_trigger_data_trig_before ON trigger_test_generated;
DROP TRIGGER show_trigger_data_trig_after ON trigger_test_generated;
-- should error
insert into trigger_test(test_argisnull) values(true);
@ -565,3 +584,20 @@ CREATE TRIGGER a_t AFTER UPDATE ON transition_table_test
update transition_table_test set name = 'b';
drop table transition_table_test;
drop function transition_table_test_f();
-- dealing with generated columns
CREATE FUNCTION generated_test_func1() RETURNS trigger
LANGUAGE pltcl
AS $$
# not allowed
set NEW(j) 5
return [array get NEW]
$$;
CREATE TRIGGER generated_test_trigger1 BEFORE INSERT ON trigger_test_generated
FOR EACH ROW EXECUTE PROCEDURE generated_test_func1();
TRUNCATE trigger_test_generated;
INSERT INTO trigger_test_generated (i) VALUES (1);
SELECT * FROM trigger_test_generated;

46
src/test/regress/expected/create_table_like.out
View File

@ -113,6 +113,52 @@ SELECT * FROM test_like_id_3; -- identity was copied and applied
(1 row)
DROP TABLE test_like_id_1, test_like_id_2, test_like_id_3;
CREATE TABLE test_like_gen_1 (a int, b int GENERATED ALWAYS AS (a * 2) STORED);
\d test_like_gen_1
Table "public.test_like_gen_1"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
a | integer | | |
b | integer | | | generated always as (a * 2) stored
INSERT INTO test_like_gen_1 (a) VALUES (1);
SELECT * FROM test_like_gen_1;
a | b
---+---
1 | 2
(1 row)
CREATE TABLE test_like_gen_2 (LIKE test_like_gen_1);
\d test_like_gen_2
Table "public.test_like_gen_2"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+---------
a | integer | | |
b | integer | | |
INSERT INTO test_like_gen_2 (a) VALUES (1);
SELECT * FROM test_like_gen_2;
a | b
---+---
1 |
(1 row)
CREATE TABLE test_like_gen_3 (LIKE test_like_gen_1 INCLUDING GENERATED);
\d test_like_gen_3
Table "public.test_like_gen_3"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
a | integer | | |
b | integer | | | generated always as (a * 2) stored
INSERT INTO test_like_gen_3 (a) VALUES (1);
SELECT * FROM test_like_gen_3;
a | b
---+---
1 | 2
(1 row)
DROP TABLE test_like_gen_1, test_like_gen_2, test_like_gen_3;
CREATE TABLE inhg (x text, LIKE inhx INCLUDING INDEXES, y text); /* copies indexes */
INSERT INTO inhg VALUES (5, 10);
INSERT INTO inhg VALUES (20, 10); -- should fail

768
src/test/regress/expected/generated.out Normal file
View File

@ -0,0 +1,768 @@
-- sanity check of system catalog
SELECT attrelid, attname, attgenerated FROM pg_attribute WHERE attgenerated NOT IN ('', 's');
attrelid | attname | attgenerated
----------+---------+--------------
(0 rows)
CREATE TABLE gtest0 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (55) STORED);
CREATE TABLE gtest1 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
SELECT table_name, column_name, column_default, is_nullable, is_generated, generation_expression FROM information_schema.columns WHERE table_name LIKE 'gtest_' ORDER BY 1, 2;
table_name | column_name | column_default | is_nullable | is_generated | generation_expression
------------+-------------+----------------+-------------+--------------+-----------------------
gtest0 | a | | NO | NEVER |
gtest0 | b | | YES | ALWAYS | 55
gtest1 | a | | NO | NEVER |
gtest1 | b | | YES | ALWAYS | (a * 2)
(4 rows)
SELECT table_name, column_name, dependent_column FROM information_schema.column_column_usage ORDER BY 1, 2, 3;
table_name | column_name | dependent_column
------------+-------------+------------------
gtest1 | a | b
(1 row)
\d gtest1
Table "public.gtest1"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
a | integer | | not null |
b | integer | | | generated always as (a * 2) stored
Indexes:
"gtest1_pkey" PRIMARY KEY, btree (a)
-- duplicate generated
CREATE TABLE gtest_err_1 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED GENERATED ALWAYS AS (a * 3) STORED);
ERROR: multiple generation clauses specified for column "b" of table "gtest_err_1"
LINE 1: ...ARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED GENERATED ...
^
-- references to other generated columns, including self-references
CREATE TABLE gtest_err_2a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (b * 2) STORED);
ERROR: cannot use generated column "b" in column generation expression
LINE 1: ...2a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (b * 2) STO...
^
DETAIL: A generated column cannot reference another generated column.
CREATE TABLE gtest_err_2b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED, c int GENERATED ALWAYS AS (b * 3) STORED);
ERROR: cannot use generated column "b" in column generation expression
LINE 1: ...AYS AS (a * 2) STORED, c int GENERATED ALWAYS AS (b * 3) STO...
^
DETAIL: A generated column cannot reference another generated column.
-- invalid reference
CREATE TABLE gtest_err_3 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (c * 2) STORED);
ERROR: column "c" does not exist
LINE 1: ..._3 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (c * 2) STO...
^
-- generation expression must be immutable
CREATE TABLE gtest_err_4 (a int PRIMARY KEY, b double precision GENERATED ALWAYS AS (random()) STORED);
ERROR: generation expression is not immutable
-- cannot have default/identity and generated
CREATE TABLE gtest_err_5a (a int PRIMARY KEY, b int DEFAULT 5 GENERATED ALWAYS AS (a * 2) STORED);
ERROR: both default and generation expression specified for column "b" of table "gtest_err_5a"
LINE 1: ... gtest_err_5a (a int PRIMARY KEY, b int DEFAULT 5 GENERATED ...
^
CREATE TABLE gtest_err_5b (a int PRIMARY KEY, b int GENERATED ALWAYS AS identity GENERATED ALWAYS AS (a * 2) STORED);
ERROR: both identity and generation expression specified for column "b" of table "gtest_err_5b"
LINE 1: ...t PRIMARY KEY, b int GENERATED ALWAYS AS identity GENERATED ...
^
-- reference to system column not allowed in generated column
CREATE TABLE gtest_err_6a (a int PRIMARY KEY, b bool GENERATED ALWAYS AS (xmin <> 37) STORED);
ERROR: cannot use system column "xmin" in column generation expression
LINE 1: ...a (a int PRIMARY KEY, b bool GENERATED ALWAYS AS (xmin <> 37...
^
-- various prohibited constructs
CREATE TABLE gtest_err_7a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (avg(a)) STORED);
ERROR: aggregate functions are not allowed in column generation expressions
LINE 1: ...7a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (avg(a)) ST...
^
CREATE TABLE gtest_err_7b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (row_number() OVER (ORDER BY a)) STORED);
ERROR: window functions are not allowed in column generation expressions
LINE 1: ...7b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (row_number...
^
CREATE TABLE gtest_err_7c (a int PRIMARY KEY, b int GENERATED ALWAYS AS ((SELECT a)) STORED);
ERROR: cannot use subquery in column generation expression
LINE 1: ...7c (a int PRIMARY KEY, b int GENERATED ALWAYS AS ((SELECT a)...
^
CREATE TABLE gtest_err_7d (a int PRIMARY KEY, b int GENERATED ALWAYS AS (generate_series(1, a)) STORED);
ERROR: set-returning functions are not allowed in column generation expressions
LINE 1: ...7d (a int PRIMARY KEY, b int GENERATED ALWAYS AS (generate_s...
^
INSERT INTO gtest1 VALUES (1);
INSERT INTO gtest1 VALUES (2, DEFAULT);
INSERT INTO gtest1 VALUES (3, 33); -- error
ERROR: cannot insert into column "b"
DETAIL: Column "b" is a generated column.
SELECT * FROM gtest1 ORDER BY a;
a | b
---+---
1 | 2
2 | 4
(2 rows)
UPDATE gtest1 SET b = DEFAULT WHERE a = 1;
UPDATE gtest1 SET b = 11 WHERE a = 1; -- error
ERROR: column "b" can only be updated to DEFAULT
DETAIL: Column "b" is a generated column.
SELECT * FROM gtest1 ORDER BY a;
a | b
---+---
1 | 2
2 | 4
(2 rows)
SELECT a, b, b * 2 AS b2 FROM gtest1 ORDER BY a;
a | b | b2
---+---+----
1 | 2 | 4
2 | 4 | 8
(2 rows)
SELECT a, b FROM gtest1 WHERE b = 4 ORDER BY a;
a | b
---+---
2 | 4
(1 row)
-- test that overflow error happens on write
INSERT INTO gtest1 VALUES (2000000000);
ERROR: integer out of range
SELECT * FROM gtest1;
a | b
---+---
2 | 4
1 | 2
(2 rows)
DELETE FROM gtest1 WHERE a = 2000000000;
-- test with joins
CREATE TABLE gtestx (x int, y int);
INSERT INTO gtestx VALUES (11, 1), (22, 2), (33, 3);
SELECT * FROM gtestx, gtest1 WHERE gtestx.y = gtest1.a;
x | y | a | b
----+---+---+---
11 | 1 | 1 | 2
22 | 2 | 2 | 4
(2 rows)
DROP TABLE gtestx;
-- test UPDATE/DELETE quals
SELECT * FROM gtest1 ORDER BY a;
a | b
---+---
1 | 2
2 | 4
(2 rows)
UPDATE gtest1 SET a = 3 WHERE b = 4;
SELECT * FROM gtest1 ORDER BY a;
a | b
---+---
1 | 2
3 | 6
(2 rows)
DELETE FROM gtest1 WHERE b = 2;
SELECT * FROM gtest1 ORDER BY a;
a | b
---+---
3 | 6
(1 row)
-- views
CREATE VIEW gtest1v AS SELECT * FROM gtest1;
SELECT * FROM gtest1v;
a | b
---+---
3 | 6
(1 row)
INSERT INTO gtest1v VALUES (4, 8); -- fails
ERROR: cannot insert into column "b"
DETAIL: Column "b" is a generated column.
DROP VIEW gtest1v;
-- CTEs
WITH foo AS (SELECT * FROM gtest1) SELECT * FROM foo;
a | b
---+---
3 | 6
(1 row)
-- inheritance
CREATE TABLE gtest1_1 () INHERITS (gtest1);
SELECT * FROM gtest1_1;
a | b
---+---
(0 rows)
\d gtest1_1
Table "public.gtest1_1"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
a | integer | | not null |
b | integer | | | generated always as (a * 2) stored
Inherits: gtest1
INSERT INTO gtest1_1 VALUES (4);
SELECT * FROM gtest1_1;
a | b
---+---
4 | 8
(1 row)
SELECT * FROM gtest1;
a | b
---+---
3 | 6
4 | 8
(2 rows)
-- test inheritance mismatch
CREATE TABLE gtesty (x int, b int);
CREATE TABLE gtest1_2 () INHERITS (gtest1, gtesty); -- error
NOTICE: merging multiple inherited definitions of column "b"
ERROR: inherited column "b" has a generation conflict
DROP TABLE gtesty;
-- test stored update
CREATE TABLE gtest3 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 3) STORED);
INSERT INTO gtest3 (a) VALUES (1), (2), (3);
SELECT * FROM gtest3 ORDER BY a;
a | b
---+---
1 | 3
2 | 6
3 | 9
(3 rows)
UPDATE gtest3 SET a = 22 WHERE a = 2;
SELECT * FROM gtest3 ORDER BY a;
a | b
----+----
1 | 3
3 | 9
22 | 66
(3 rows)
-- COPY
TRUNCATE gtest1;
INSERT INTO gtest1 (a) VALUES (1), (2);
COPY gtest1 TO stdout;
1
2
COPY gtest1 (a, b) TO stdout;
ERROR: column "b" is a generated column
DETAIL: Generated columns cannot be used in COPY.
COPY gtest1 FROM stdin;
COPY gtest1 (a, b) FROM stdin;
ERROR: column "b" is a generated column
DETAIL: Generated columns cannot be used in COPY.
SELECT * FROM gtest1 ORDER BY a;
a | b
---+---
1 | 2
2 | 4
3 | 6
4 | 8
(4 rows)
TRUNCATE gtest3;
INSERT INTO gtest3 (a) VALUES (1), (2);
COPY gtest3 TO stdout;
1
2
COPY gtest3 (a, b) TO stdout;
ERROR: column "b" is a generated column
DETAIL: Generated columns cannot be used in COPY.
COPY gtest3 FROM stdin;
COPY gtest3 (a, b) FROM stdin;
ERROR: column "b" is a generated column
DETAIL: Generated columns cannot be used in COPY.
SELECT * FROM gtest3 ORDER BY a;
a | b
---+----
1 | 3
2 | 6
3 | 9
4 | 12
(4 rows)
-- null values
CREATE TABLE gtest2 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (NULL) STORED);
INSERT INTO gtest2 VALUES (1);
SELECT * FROM gtest2;
a | b
---+---
1 |
(1 row)
-- composite types
CREATE TYPE double_int as (a int, b int);
CREATE TABLE gtest4 (
a int,
b double_int GENERATED ALWAYS AS ((a * 2, a * 3)) STORED
);
INSERT INTO gtest4 VALUES (1), (6);
SELECT * FROM gtest4;
a | b
---+---------
1 | (2,3)
6 | (12,18)
(2 rows)
DROP TABLE gtest4;
DROP TYPE double_int;
-- using tableoid is allowed
CREATE TABLE gtest_tableoid (
a int PRIMARY KEY,
b bool GENERATED ALWAYS AS (tableoid <> 0) STORED
);
INSERT INTO gtest_tableoid VALUES (1), (2);
SELECT * FROM gtest_tableoid;
a | b
---+---
1 | t
2 | t
(2 rows)
-- drop column behavior
CREATE TABLE gtest10 (a int PRIMARY KEY, b int, c int GENERATED ALWAYS AS (b * 2) STORED);
ALTER TABLE gtest10 DROP COLUMN b;
\d gtest10
Table "public.gtest10"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+---------
a | integer | | not null |
Indexes:
"gtest10_pkey" PRIMARY KEY, btree (a)
CREATE TABLE gtest10a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
ALTER TABLE gtest10a DROP COLUMN b;
INSERT INTO gtest10a (a) VALUES (1);
-- privileges
CREATE USER regress_user11;
CREATE TABLE gtest11s (a int PRIMARY KEY, b int, c int GENERATED ALWAYS AS (b * 2) STORED);
INSERT INTO gtest11s VALUES (1, 10), (2, 20);
GRANT SELECT (a, c) ON gtest11s TO regress_user11;
CREATE FUNCTION gf1(a int) RETURNS int AS $$ SELECT a * 3 $$ IMMUTABLE LANGUAGE SQL;
REVOKE ALL ON FUNCTION gf1(int) FROM PUBLIC;
CREATE TABLE gtest12s (a int PRIMARY KEY, b int, c int GENERATED ALWAYS AS (gf1(b)) STORED);
INSERT INTO gtest12s VALUES (1, 10), (2, 20);
GRANT SELECT (a, c) ON gtest12s TO regress_user11;
SET ROLE regress_user11;
SELECT a, b FROM gtest11s; -- not allowed
ERROR: permission denied for table gtest11s
SELECT a, c FROM gtest11s; -- allowed
a | c
---+----
1 | 20
2 | 40
(2 rows)
SELECT gf1(10); -- not allowed
ERROR: permission denied for function gf1
SELECT a, c FROM gtest12s; -- allowed
a | c
---+----
1 | 30
2 | 60
(2 rows)
RESET ROLE;
DROP TABLE gtest11s, gtest12s;
DROP FUNCTION gf1(int);
DROP USER regress_user11;
-- check constraints
CREATE TABLE gtest20 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED CHECK (b < 50));
INSERT INTO gtest20 (a) VALUES (10); -- ok
INSERT INTO gtest20 (a) VALUES (30); -- violates constraint
ERROR: new row for relation "gtest20" violates check constraint "gtest20_b_check"
DETAIL: Failing row contains (30, 60).
CREATE TABLE gtest20a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
INSERT INTO gtest20a (a) VALUES (10);
INSERT INTO gtest20a (a) VALUES (30);
ALTER TABLE gtest20a ADD CHECK (b < 50); -- fails on existing row
ERROR: check constraint "gtest20a_b_check" is violated by some row
CREATE TABLE gtest20b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
INSERT INTO gtest20b (a) VALUES (10);
INSERT INTO gtest20b (a) VALUES (30);
ALTER TABLE gtest20b ADD CONSTRAINT chk CHECK (b < 50) NOT VALID;
ALTER TABLE gtest20b VALIDATE CONSTRAINT chk; -- fails on existing row
ERROR: check constraint "chk" is violated by some row
-- not-null constraints
CREATE TABLE gtest21a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (nullif(a, 0)) STORED NOT NULL);
INSERT INTO gtest21a (a) VALUES (1); -- ok
INSERT INTO gtest21a (a) VALUES (0); -- violates constraint
ERROR: null value in column "b" violates not-null constraint
DETAIL: Failing row contains (0, null).
CREATE TABLE gtest21b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (nullif(a, 0)) STORED);
ALTER TABLE gtest21b ALTER COLUMN b SET NOT NULL;
INSERT INTO gtest21b (a) VALUES (1); -- ok
INSERT INTO gtest21b (a) VALUES (0); -- violates constraint
ERROR: null value in column "b" violates not-null constraint
DETAIL: Failing row contains (0, null).
ALTER TABLE gtest21b ALTER COLUMN b DROP NOT NULL;
INSERT INTO gtest21b (a) VALUES (0); -- ok now
-- index constraints
CREATE TABLE gtest22a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a / 2) STORED UNIQUE);
INSERT INTO gtest22a VALUES (2);
INSERT INTO gtest22a VALUES (3);
ERROR: duplicate key value violates unique constraint "gtest22a_b_key"
DETAIL: Key (b)=(1) already exists.
INSERT INTO gtest22a VALUES (4);
CREATE TABLE gtest22b (a int, b int GENERATED ALWAYS AS (a / 2) STORED, PRIMARY KEY (a, b));
INSERT INTO gtest22b VALUES (2);
INSERT INTO gtest22b VALUES (2);
ERROR: duplicate key value violates unique constraint "gtest22b_pkey"
DETAIL: Key (a, b)=(2, 1) already exists.
-- indexes
CREATE TABLE gtest22c (a int, b int GENERATED ALWAYS AS (a * 2) STORED);
CREATE INDEX gtest22c_b_idx ON gtest22c (b);
CREATE INDEX gtest22c_expr_idx ON gtest22c ((b * 3));
CREATE INDEX gtest22c_pred_idx ON gtest22c (a) WHERE b > 0;
\d gtest22c
Table "public.gtest22c"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
a | integer | | |
b | integer | | | generated always as (a * 2) stored
Indexes:
"gtest22c_b_idx" btree (b)
"gtest22c_expr_idx" btree ((b * 3))
"gtest22c_pred_idx" btree (a) WHERE b > 0
INSERT INTO gtest22c VALUES (1), (2), (3);
SET enable_seqscan TO off;
SET enable_bitmapscan TO off;
EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE b = 4;
QUERY PLAN
---------------------------------------------
Index Scan using gtest22c_b_idx on gtest22c
Index Cond: (b = 4)
(2 rows)
SELECT * FROM gtest22c WHERE b = 4;
a | b
---+---
2 | 4
(1 row)
EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE b * 3 = 6;
QUERY PLAN
------------------------------------------------
Index Scan using gtest22c_expr_idx on gtest22c
Index Cond: ((b * 3) = 6)
(2 rows)
SELECT * FROM gtest22c WHERE b * 3 = 6;
a | b
---+---
1 | 2
(1 row)
EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE a = 1 AND b > 0;
QUERY PLAN
------------------------------------------------
Index Scan using gtest22c_pred_idx on gtest22c
Index Cond: (a = 1)
(2 rows)
SELECT * FROM gtest22c WHERE a = 1 AND b > 0;
a | b
---+---
1 | 2
(1 row)
RESET enable_seqscan;
RESET enable_bitmapscan;
-- foreign keys
CREATE TABLE gtest23a (x int PRIMARY KEY, y int);
INSERT INTO gtest23a VALUES (1, 11), (2, 22), (3, 33);
CREATE TABLE gtest23x (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED REFERENCES gtest23a (x) ON UPDATE CASCADE); -- error
ERROR: invalid ON UPDATE action for foreign key constraint containing generated column
CREATE TABLE gtest23x (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED REFERENCES gtest23a (x) ON DELETE SET NULL); -- error
ERROR: invalid ON DELETE action for foreign key constraint containing generated column
CREATE TABLE gtest23b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED REFERENCES gtest23a (x));
\d gtest23b
Table "public.gtest23b"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
a | integer | | not null |
b | integer | | | generated always as (a * 2) stored
Indexes:
"gtest23b_pkey" PRIMARY KEY, btree (a)
Foreign-key constraints:
"gtest23b_b_fkey" FOREIGN KEY (b) REFERENCES gtest23a(x)
INSERT INTO gtest23b VALUES (1); -- ok
INSERT INTO gtest23b VALUES (5); -- error
ERROR: insert or update on table "gtest23b" violates foreign key constraint "gtest23b_b_fkey"
DETAIL: Key (b)=(10) is not present in table "gtest23a".
DROP TABLE gtest23b;
DROP TABLE gtest23a;
CREATE TABLE gtest23p (x int, y int GENERATED ALWAYS AS (x * 2) STORED, PRIMARY KEY (y));
INSERT INTO gtest23p VALUES (1), (2), (3);
CREATE TABLE gtest23q (a int PRIMARY KEY, b int REFERENCES gtest23p (y));
INSERT INTO gtest23q VALUES (1, 2); -- ok
INSERT INTO gtest23q VALUES (2, 5); -- error
ERROR: insert or update on table "gtest23q" violates foreign key constraint "gtest23q_b_fkey"
DETAIL: Key (b)=(5) is not present in table "gtest23p".
-- domains
CREATE DOMAIN gtestdomain1 AS int CHECK (VALUE < 10);
CREATE TABLE gtest24 (a int PRIMARY KEY, b gtestdomain1 GENERATED ALWAYS AS (a * 2) STORED);
INSERT INTO gtest24 (a) VALUES (4); -- ok
INSERT INTO gtest24 (a) VALUES (6); -- error
ERROR: value for domain gtestdomain1 violates check constraint "gtestdomain1_check"
-- typed tables (currently not supported)
CREATE TYPE gtest_type AS (f1 integer, f2 text, f3 bigint);
CREATE TABLE gtest28 OF gtest_type (f1 WITH OPTIONS GENERATED ALWAYS AS (f2 *2) STORED);
ERROR: generated columns are not supported on typed tables
DROP TYPE gtest_type CASCADE;
-- table partitions (currently not supported)
CREATE TABLE gtest_parent (f1 date NOT NULL, f2 text, f3 bigint) PARTITION BY RANGE (f1);
CREATE TABLE gtest_child PARTITION OF gtest_parent (
f3 WITH OPTIONS GENERATED ALWAYS AS (f2 * 2) STORED
) FOR VALUES FROM ('2016-07-01') TO ('2016-08-01'); -- error
ERROR: generated columns are not supported on partitions
DROP TABLE gtest_parent;
-- partitioned table
CREATE TABLE gtest_parent (f1 date NOT NULL, f2 bigint, f3 bigint GENERATED ALWAYS AS (f2 * 2) STORED) PARTITION BY RANGE (f1);
CREATE TABLE gtest_child PARTITION OF gtest_parent FOR VALUES FROM ('2016-07-01') TO ('2016-08-01');
INSERT INTO gtest_parent (f1, f2) VALUES ('2016-07-15', 1);
SELECT * FROM gtest_parent;
f1 | f2 | f3
------------+----+----
07-15-2016 | 1 | 2
(1 row)
SELECT * FROM gtest_child;
f1 | f2 | f3
------------+----+----
07-15-2016 | 1 | 2
(1 row)
DROP TABLE gtest_parent;
-- generated columns in partition key (not allowed)
CREATE TABLE gtest_parent (f1 date NOT NULL, f2 bigint, f3 bigint GENERATED ALWAYS AS (f2 * 2) STORED) PARTITION BY RANGE (f3);
ERROR: cannot use generated column in partition key
LINE 1: ...ENERATED ALWAYS AS (f2 * 2) STORED) PARTITION BY RANGE (f3);
^
DETAIL: Column "f3" is a generated column.
CREATE TABLE gtest_parent (f1 date NOT NULL, f2 bigint, f3 bigint GENERATED ALWAYS AS (f2 * 2) STORED) PARTITION BY RANGE ((f3 * 3));
ERROR: cannot use generated column in partition key
LINE 1: ...ED ALWAYS AS (f2 * 2) STORED) PARTITION BY RANGE ((f3 * 3));
^
DETAIL: Column "f3" is a generated column.
-- ALTER TABLE ... ADD COLUMN
CREATE TABLE gtest25 (a int PRIMARY KEY);
INSERT INTO gtest25 VALUES (3), (4);
ALTER TABLE gtest25 ADD COLUMN b int GENERATED ALWAYS AS (a * 3) STORED;
SELECT * FROM gtest25 ORDER BY a;
a | b
---+----
3 | 9
4 | 12
(2 rows)
ALTER TABLE gtest25 ADD COLUMN x int GENERATED ALWAYS AS (b * 4) STORED; -- error
ERROR: cannot use generated column "b" in column generation expression
DETAIL: A generated column cannot reference another generated column.
ALTER TABLE gtest25 ADD COLUMN x int GENERATED ALWAYS AS (z * 4) STORED; -- error
ERROR: column "z" does not exist
-- ALTER TABLE ... ALTER COLUMN
CREATE TABLE gtest27 (
a int,
b int GENERATED ALWAYS AS (a * 2) STORED
);
INSERT INTO gtest27 (a) VALUES (3), (4);
ALTER TABLE gtest27 ALTER COLUMN a TYPE text; -- error
ERROR: cannot alter type of a column used by a generated column
DETAIL: Column "a" is used by generated column "b".
ALTER TABLE gtest27 ALTER COLUMN b TYPE numeric;
\d gtest27
Table "public.gtest27"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+--------------------------------------
a | integer | | |
b | numeric | | | generated always as ((a * 2)) stored
SELECT * FROM gtest27;
a | b
---+---
3 | 6
4 | 8
(2 rows)
ALTER TABLE gtest27 ALTER COLUMN b TYPE boolean USING b <> 0; -- error
ERROR: generation expression for column "b" cannot be cast automatically to type boolean
ALTER TABLE gtest27 ALTER COLUMN b DROP DEFAULT; -- error
ERROR: column "b" of relation "gtest27" is a generated column
\d gtest27
Table "public.gtest27"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+--------------------------------------
a | integer | | |
b | numeric | | | generated always as ((a * 2)) stored
-- triggers
CREATE TABLE gtest26 (
a int PRIMARY KEY,
b int GENERATED ALWAYS AS (a * 2) STORED
);
CREATE FUNCTION gtest_trigger_func() RETURNS trigger
LANGUAGE plpgsql
AS $$
BEGIN
IF tg_op IN ('DELETE', 'UPDATE') THEN
RAISE INFO '%: %: old = %', TG_NAME, TG_WHEN, OLD;
END IF;
IF tg_op IN ('INSERT', 'UPDATE') THEN
RAISE INFO '%: %: new = %', TG_NAME, TG_WHEN, NEW;
END IF;
IF tg_op = 'DELETE' THEN
RETURN OLD;
ELSE
RETURN NEW;
END IF;
END
$$;
CREATE TRIGGER gtest1 BEFORE DELETE OR UPDATE ON gtest26
FOR EACH ROW
WHEN (OLD.b < 0) -- ok
EXECUTE PROCEDURE gtest_trigger_func();
CREATE TRIGGER gtest2a BEFORE INSERT OR UPDATE ON gtest26
FOR EACH ROW
WHEN (NEW.b < 0) -- error
EXECUTE PROCEDURE gtest_trigger_func();
ERROR: BEFORE trigger's WHEN condition cannot reference NEW generated columns
LINE 3: WHEN (NEW.b < 0)
^
DETAIL: Column "b" is a generated column.
CREATE TRIGGER gtest2b BEFORE INSERT OR UPDATE ON gtest26
FOR EACH ROW
WHEN (NEW.* IS NOT NULL) -- error
EXECUTE PROCEDURE gtest_trigger_func();
ERROR: BEFORE trigger's WHEN condition cannot reference NEW generated columns
LINE 3: WHEN (NEW.* IS NOT NULL)
^
DETAIL: A whole-row reference is used and the table contains generated columns.
CREATE TRIGGER gtest2 BEFORE INSERT ON gtest26
FOR EACH ROW
WHEN (NEW.a < 0)
EXECUTE PROCEDURE gtest_trigger_func();
CREATE TRIGGER gtest3 AFTER DELETE OR UPDATE ON gtest26
FOR EACH ROW
WHEN (OLD.b < 0) -- ok
EXECUTE PROCEDURE gtest_trigger_func();
CREATE TRIGGER gtest4 AFTER INSERT OR UPDATE ON gtest26
FOR EACH ROW
WHEN (NEW.b < 0) -- ok
EXECUTE PROCEDURE gtest_trigger_func();
INSERT INTO gtest26 (a) VALUES (-2), (0), (3);
INFO: gtest2: BEFORE: new = (-2,)
INFO: gtest4: AFTER: new = (-2,-4)
SELECT * FROM gtest26 ORDER BY a;
a | b
----+----
-2 | -4
0 | 0
3 | 6
(3 rows)
UPDATE gtest26 SET a = a * -2;
INFO: gtest1: BEFORE: old = (-2,-4)
INFO: gtest1: BEFORE: new = (4,)
INFO: gtest3: AFTER: old = (-2,-4)
INFO: gtest3: AFTER: new = (4,8)
INFO: gtest4: AFTER: old = (3,6)
INFO: gtest4: AFTER: new = (-6,-12)
SELECT * FROM gtest26 ORDER BY a;
a | b
----+-----
-6 | -12
0 | 0
4 | 8
(3 rows)
DELETE FROM gtest26 WHERE a = -6;
INFO: gtest1: BEFORE: old = (-6,-12)
INFO: gtest3: AFTER: old = (-6,-12)
SELECT * FROM gtest26 ORDER BY a;
a | b
---+---
0 | 0
4 | 8
(2 rows)
DROP TRIGGER gtest1 ON gtest26;
DROP TRIGGER gtest2 ON gtest26;
DROP TRIGGER gtest3 ON gtest26;
-- Check that an UPDATE of "a" fires the trigger for UPDATE OF b, per
-- SQL standard.
CREATE FUNCTION gtest_trigger_func3() RETURNS trigger
LANGUAGE plpgsql
AS $$
BEGIN
RAISE NOTICE 'OK';
RETURN NEW;
END
$$;
CREATE TRIGGER gtest11 BEFORE UPDATE OF b ON gtest26
FOR EACH ROW
EXECUTE PROCEDURE gtest_trigger_func3();
UPDATE gtest26 SET a = 1 WHERE a = 0;
NOTICE: OK
DROP TRIGGER gtest11 ON gtest26;
TRUNCATE gtest26;
-- check that modifications of stored generated columns in triggers do
-- not get propagated
CREATE FUNCTION gtest_trigger_func4() RETURNS trigger
LANGUAGE plpgsql
AS $$
BEGIN
NEW.a = 10;
NEW.b = 300;
RETURN NEW;
END;
$$;
CREATE TRIGGER gtest12_01 BEFORE UPDATE ON gtest26
FOR EACH ROW
EXECUTE PROCEDURE gtest_trigger_func();
CREATE TRIGGER gtest12_02 BEFORE UPDATE ON gtest26
FOR EACH ROW
EXECUTE PROCEDURE gtest_trigger_func4();
CREATE TRIGGER gtest12_03 BEFORE UPDATE ON gtest26
FOR EACH ROW
EXECUTE PROCEDURE gtest_trigger_func();
INSERT INTO gtest26 (a) VALUES (1);
UPDATE gtest26 SET a = 11 WHERE a = 1;
INFO: gtest12_01: BEFORE: old = (1,2)
INFO: gtest12_01: BEFORE: new = (11,)
INFO: gtest12_03: BEFORE: old = (1,2)
INFO: gtest12_03: BEFORE: new = (10,)
SELECT * FROM gtest26 ORDER BY a;
a | b
----+----
10 | 20
(1 row)
-- LIKE INCLUDING GENERATED and dropped column handling
CREATE TABLE gtest28a (
a int,
b int,
c int,
x int GENERATED ALWAYS AS (b * 2) STORED
);
ALTER TABLE gtest28a DROP COLUMN a;
CREATE TABLE gtest28b (LIKE gtest28a INCLUDING GENERATED);
\d gtest28*
Table "public.gtest28a"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
b | integer | | |
c | integer | | |
x | integer | | | generated always as (b * 2) stored
Table "public.gtest28b"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
b | integer | | |
c | integer | | |
x | integer | | | generated always as (b * 2) stored

2
src/test/regress/parallel_schedule
View File

@ -84,7 +84,7 @@ test: select_into select_distinct select_distinct_on select_implicit select_havi
# ----------
# Another group of parallel tests
# ----------
test: brin gin gist spgist privileges init_privs security_label collate matview lock replica_identity rowsecurity object_address tablesample groupingsets drop_operator password identity
test: brin gin gist spgist privileges init_privs security_label collate matview lock replica_identity rowsecurity object_address tablesample groupingsets drop_operator password identity generated
# ----------
# Another group of parallel tests

1
src/test/regress/serial_schedule
View File

@ -122,6 +122,7 @@ test: groupingsets
test: drop_operator
test: password
test: identity
test: generated
test: create_table_like
test: alter_generic
test: alter_operator

14
src/test/regress/sql/create_table_like.sql
View File

@ -51,6 +51,20 @@ INSERT INTO test_like_id_3 (b) VALUES ('b3');
SELECT * FROM test_like_id_3; -- identity was copied and applied
DROP TABLE test_like_id_1, test_like_id_2, test_like_id_3;
CREATE TABLE test_like_gen_1 (a int, b int GENERATED ALWAYS AS (a * 2) STORED);
\d test_like_gen_1
INSERT INTO test_like_gen_1 (a) VALUES (1);
SELECT * FROM test_like_gen_1;
CREATE TABLE test_like_gen_2 (LIKE test_like_gen_1);
\d test_like_gen_2
INSERT INTO test_like_gen_2 (a) VALUES (1);
SELECT * FROM test_like_gen_2;
CREATE TABLE test_like_gen_3 (LIKE test_like_gen_1 INCLUDING GENERATED);
\d test_like_gen_3
INSERT INTO test_like_gen_3 (a) VALUES (1);
SELECT * FROM test_like_gen_3;
DROP TABLE test_like_gen_1, test_like_gen_2, test_like_gen_3;
CREATE TABLE inhg (x text, LIKE inhx INCLUDING INDEXES, y text); /* copies indexes */
INSERT INTO inhg VALUES (5, 10);
INSERT INTO inhg VALUES (20, 10); -- should fail

451
src/test/regress/sql/generated.sql Normal file
View File

@ -0,0 +1,451 @@
-- sanity check of system catalog
SELECT attrelid, attname, attgenerated FROM pg_attribute WHERE attgenerated NOT IN ('', 's');
CREATE TABLE gtest0 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (55) STORED);
CREATE TABLE gtest1 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
SELECT table_name, column_name, column_default, is_nullable, is_generated, generation_expression FROM information_schema.columns WHERE table_name LIKE 'gtest_' ORDER BY 1, 2;
SELECT table_name, column_name, dependent_column FROM information_schema.column_column_usage ORDER BY 1, 2, 3;
\d gtest1
-- duplicate generated
CREATE TABLE gtest_err_1 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED GENERATED ALWAYS AS (a * 3) STORED);
-- references to other generated columns, including self-references
CREATE TABLE gtest_err_2a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (b * 2) STORED);
CREATE TABLE gtest_err_2b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED, c int GENERATED ALWAYS AS (b * 3) STORED);
-- invalid reference
CREATE TABLE gtest_err_3 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (c * 2) STORED);
-- generation expression must be immutable
CREATE TABLE gtest_err_4 (a int PRIMARY KEY, b double precision GENERATED ALWAYS AS (random()) STORED);
-- cannot have default/identity and generated
CREATE TABLE gtest_err_5a (a int PRIMARY KEY, b int DEFAULT 5 GENERATED ALWAYS AS (a * 2) STORED);
CREATE TABLE gtest_err_5b (a int PRIMARY KEY, b int GENERATED ALWAYS AS identity GENERATED ALWAYS AS (a * 2) STORED);
-- reference to system column not allowed in generated column
CREATE TABLE gtest_err_6a (a int PRIMARY KEY, b bool GENERATED ALWAYS AS (xmin <> 37) STORED);
-- various prohibited constructs
CREATE TABLE gtest_err_7a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (avg(a)) STORED);
CREATE TABLE gtest_err_7b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (row_number() OVER (ORDER BY a)) STORED);
CREATE TABLE gtest_err_7c (a int PRIMARY KEY, b int GENERATED ALWAYS AS ((SELECT a)) STORED);
CREATE TABLE gtest_err_7d (a int PRIMARY KEY, b int GENERATED ALWAYS AS (generate_series(1, a)) STORED);
INSERT INTO gtest1 VALUES (1);
INSERT INTO gtest1 VALUES (2, DEFAULT);
INSERT INTO gtest1 VALUES (3, 33); -- error
SELECT * FROM gtest1 ORDER BY a;
UPDATE gtest1 SET b = DEFAULT WHERE a = 1;
UPDATE gtest1 SET b = 11 WHERE a = 1; -- error
SELECT * FROM gtest1 ORDER BY a;
SELECT a, b, b * 2 AS b2 FROM gtest1 ORDER BY a;
SELECT a, b FROM gtest1 WHERE b = 4 ORDER BY a;
-- test that overflow error happens on write
INSERT INTO gtest1 VALUES (2000000000);
SELECT * FROM gtest1;
DELETE FROM gtest1 WHERE a = 2000000000;
-- test with joins
CREATE TABLE gtestx (x int, y int);
INSERT INTO gtestx VALUES (11, 1), (22, 2), (33, 3);
SELECT * FROM gtestx, gtest1 WHERE gtestx.y = gtest1.a;
DROP TABLE gtestx;
-- test UPDATE/DELETE quals
SELECT * FROM gtest1 ORDER BY a;
UPDATE gtest1 SET a = 3 WHERE b = 4;
SELECT * FROM gtest1 ORDER BY a;
DELETE FROM gtest1 WHERE b = 2;
SELECT * FROM gtest1 ORDER BY a;
-- views
CREATE VIEW gtest1v AS SELECT * FROM gtest1;
SELECT * FROM gtest1v;
INSERT INTO gtest1v VALUES (4, 8); -- fails
DROP VIEW gtest1v;
-- CTEs
WITH foo AS (SELECT * FROM gtest1) SELECT * FROM foo;
-- inheritance
CREATE TABLE gtest1_1 () INHERITS (gtest1);
SELECT * FROM gtest1_1;
\d gtest1_1
INSERT INTO gtest1_1 VALUES (4);
SELECT * FROM gtest1_1;
SELECT * FROM gtest1;
-- test inheritance mismatch
CREATE TABLE gtesty (x int, b int);
CREATE TABLE gtest1_2 () INHERITS (gtest1, gtesty); -- error
DROP TABLE gtesty;
-- test stored update
CREATE TABLE gtest3 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 3) STORED);
INSERT INTO gtest3 (a) VALUES (1), (2), (3);
SELECT * FROM gtest3 ORDER BY a;
UPDATE gtest3 SET a = 22 WHERE a = 2;
SELECT * FROM gtest3 ORDER BY a;
-- COPY
TRUNCATE gtest1;
INSERT INTO gtest1 (a) VALUES (1), (2);
COPY gtest1 TO stdout;
COPY gtest1 (a, b) TO stdout;
COPY gtest1 FROM stdin;
3
4
\.
COPY gtest1 (a, b) FROM stdin;
SELECT * FROM gtest1 ORDER BY a;
TRUNCATE gtest3;
INSERT INTO gtest3 (a) VALUES (1), (2);
COPY gtest3 TO stdout;
COPY gtest3 (a, b) TO stdout;
COPY gtest3 FROM stdin;
3
4
\.
COPY gtest3 (a, b) FROM stdin;
SELECT * FROM gtest3 ORDER BY a;
-- null values
CREATE TABLE gtest2 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (NULL) STORED);
INSERT INTO gtest2 VALUES (1);
SELECT * FROM gtest2;
-- composite types
CREATE TYPE double_int as (a int, b int);
CREATE TABLE gtest4 (
a int,
b double_int GENERATED ALWAYS AS ((a * 2, a * 3)) STORED
);
INSERT INTO gtest4 VALUES (1), (6);
SELECT * FROM gtest4;
DROP TABLE gtest4;
DROP TYPE double_int;
-- using tableoid is allowed
CREATE TABLE gtest_tableoid (
a int PRIMARY KEY,
b bool GENERATED ALWAYS AS (tableoid <> 0) STORED
);
INSERT INTO gtest_tableoid VALUES (1), (2);
SELECT * FROM gtest_tableoid;
-- drop column behavior
CREATE TABLE gtest10 (a int PRIMARY KEY, b int, c int GENERATED ALWAYS AS (b * 2) STORED);
ALTER TABLE gtest10 DROP COLUMN b;
\d gtest10
CREATE TABLE gtest10a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
ALTER TABLE gtest10a DROP COLUMN b;
INSERT INTO gtest10a (a) VALUES (1);
-- privileges
CREATE USER regress_user11;
CREATE TABLE gtest11s (a int PRIMARY KEY, b int, c int GENERATED ALWAYS AS (b * 2) STORED);
INSERT INTO gtest11s VALUES (1, 10), (2, 20);
GRANT SELECT (a, c) ON gtest11s TO regress_user11;
CREATE FUNCTION gf1(a int) RETURNS int AS $$ SELECT a * 3 $$ IMMUTABLE LANGUAGE SQL;
REVOKE ALL ON FUNCTION gf1(int) FROM PUBLIC;
CREATE TABLE gtest12s (a int PRIMARY KEY, b int, c int GENERATED ALWAYS AS (gf1(b)) STORED);
INSERT INTO gtest12s VALUES (1, 10), (2, 20);
GRANT SELECT (a, c) ON gtest12s TO regress_user11;
SET ROLE regress_user11;
SELECT a, b FROM gtest11s; -- not allowed
SELECT a, c FROM gtest11s; -- allowed
SELECT gf1(10); -- not allowed
SELECT a, c FROM gtest12s; -- allowed
RESET ROLE;
DROP TABLE gtest11s, gtest12s;
DROP FUNCTION gf1(int);
DROP USER regress_user11;
-- check constraints
CREATE TABLE gtest20 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED CHECK (b < 50));
INSERT INTO gtest20 (a) VALUES (10); -- ok
INSERT INTO gtest20 (a) VALUES (30); -- violates constraint
CREATE TABLE gtest20a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
INSERT INTO gtest20a (a) VALUES (10);
INSERT INTO gtest20a (a) VALUES (30);
ALTER TABLE gtest20a ADD CHECK (b < 50); -- fails on existing row
CREATE TABLE gtest20b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
INSERT INTO gtest20b (a) VALUES (10);
INSERT INTO gtest20b (a) VALUES (30);
ALTER TABLE gtest20b ADD CONSTRAINT chk CHECK (b < 50) NOT VALID;
ALTER TABLE gtest20b VALIDATE CONSTRAINT chk; -- fails on existing row
-- not-null constraints
CREATE TABLE gtest21a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (nullif(a, 0)) STORED NOT NULL);
INSERT INTO gtest21a (a) VALUES (1); -- ok
INSERT INTO gtest21a (a) VALUES (0); -- violates constraint
CREATE TABLE gtest21b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (nullif(a, 0)) STORED);
ALTER TABLE gtest21b ALTER COLUMN b SET NOT NULL;
INSERT INTO gtest21b (a) VALUES (1); -- ok
INSERT INTO gtest21b (a) VALUES (0); -- violates constraint
ALTER TABLE gtest21b ALTER COLUMN b DROP NOT NULL;
INSERT INTO gtest21b (a) VALUES (0); -- ok now
-- index constraints
CREATE TABLE gtest22a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a / 2) STORED UNIQUE);
INSERT INTO gtest22a VALUES (2);
INSERT INTO gtest22a VALUES (3);
INSERT INTO gtest22a VALUES (4);
CREATE TABLE gtest22b (a int, b int GENERATED ALWAYS AS (a / 2) STORED, PRIMARY KEY (a, b));
INSERT INTO gtest22b VALUES (2);
INSERT INTO gtest22b VALUES (2);
-- indexes
CREATE TABLE gtest22c (a int, b int GENERATED ALWAYS AS (a * 2) STORED);
CREATE INDEX gtest22c_b_idx ON gtest22c (b);
CREATE INDEX gtest22c_expr_idx ON gtest22c ((b * 3));
CREATE INDEX gtest22c_pred_idx ON gtest22c (a) WHERE b > 0;
\d gtest22c
INSERT INTO gtest22c VALUES (1), (2), (3);
SET enable_seqscan TO off;
SET enable_bitmapscan TO off;
EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE b = 4;
SELECT * FROM gtest22c WHERE b = 4;
EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE b * 3 = 6;
SELECT * FROM gtest22c WHERE b * 3 = 6;
EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE a = 1 AND b > 0;
SELECT * FROM gtest22c WHERE a = 1 AND b > 0;
RESET enable_seqscan;
RESET enable_bitmapscan;
-- foreign keys
CREATE TABLE gtest23a (x int PRIMARY KEY, y int);
INSERT INTO gtest23a VALUES (1, 11), (2, 22), (3, 33);
CREATE TABLE gtest23x (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED REFERENCES gtest23a (x) ON UPDATE CASCADE); -- error
CREATE TABLE gtest23x (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED REFERENCES gtest23a (x) ON DELETE SET NULL); -- error
CREATE TABLE gtest23b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED REFERENCES gtest23a (x));
\d gtest23b
INSERT INTO gtest23b VALUES (1); -- ok
INSERT INTO gtest23b VALUES (5); -- error
DROP TABLE gtest23b;
DROP TABLE gtest23a;
CREATE TABLE gtest23p (x int, y int GENERATED ALWAYS AS (x * 2) STORED, PRIMARY KEY (y));
INSERT INTO gtest23p VALUES (1), (2), (3);
CREATE TABLE gtest23q (a int PRIMARY KEY, b int REFERENCES gtest23p (y));
INSERT INTO gtest23q VALUES (1, 2); -- ok
INSERT INTO gtest23q VALUES (2, 5); -- error
-- domains
CREATE DOMAIN gtestdomain1 AS int CHECK (VALUE < 10);
CREATE TABLE gtest24 (a int PRIMARY KEY, b gtestdomain1 GENERATED ALWAYS AS (a * 2) STORED);
INSERT INTO gtest24 (a) VALUES (4); -- ok
INSERT INTO gtest24 (a) VALUES (6); -- error
-- typed tables (currently not supported)
CREATE TYPE gtest_type AS (f1 integer, f2 text, f3 bigint);
CREATE TABLE gtest28 OF gtest_type (f1 WITH OPTIONS GENERATED ALWAYS AS (f2 *2) STORED);
DROP TYPE gtest_type CASCADE;
-- table partitions (currently not supported)
CREATE TABLE gtest_parent (f1 date NOT NULL, f2 text, f3 bigint) PARTITION BY RANGE (f1);
CREATE TABLE gtest_child PARTITION OF gtest_parent (
f3 WITH OPTIONS GENERATED ALWAYS AS (f2 * 2) STORED
) FOR VALUES FROM ('2016-07-01') TO ('2016-08-01'); -- error
DROP TABLE gtest_parent;
-- partitioned table
CREATE TABLE gtest_parent (f1 date NOT NULL, f2 bigint, f3 bigint GENERATED ALWAYS AS (f2 * 2) STORED) PARTITION BY RANGE (f1);
CREATE TABLE gtest_child PARTITION OF gtest_parent FOR VALUES FROM ('2016-07-01') TO ('2016-08-01');
INSERT INTO gtest_parent (f1, f2) VALUES ('2016-07-15', 1);
SELECT * FROM gtest_parent;
SELECT * FROM gtest_child;
DROP TABLE gtest_parent;
-- generated columns in partition key (not allowed)
CREATE TABLE gtest_parent (f1 date NOT NULL, f2 bigint, f3 bigint GENERATED ALWAYS AS (f2 * 2) STORED) PARTITION BY RANGE (f3);
CREATE TABLE gtest_parent (f1 date NOT NULL, f2 bigint, f3 bigint GENERATED ALWAYS AS (f2 * 2) STORED) PARTITION BY RANGE ((f3 * 3));
-- ALTER TABLE ... ADD COLUMN
CREATE TABLE gtest25 (a int PRIMARY KEY);
INSERT INTO gtest25 VALUES (3), (4);
ALTER TABLE gtest25 ADD COLUMN b int GENERATED ALWAYS AS (a * 3) STORED;
SELECT * FROM gtest25 ORDER BY a;
ALTER TABLE gtest25 ADD COLUMN x int GENERATED ALWAYS AS (b * 4) STORED; -- error
ALTER TABLE gtest25 ADD COLUMN x int GENERATED ALWAYS AS (z * 4) STORED; -- error
-- ALTER TABLE ... ALTER COLUMN
CREATE TABLE gtest27 (
a int,
b int GENERATED ALWAYS AS (a * 2) STORED
);
INSERT INTO gtest27 (a) VALUES (3), (4);
ALTER TABLE gtest27 ALTER COLUMN a TYPE text; -- error
ALTER TABLE gtest27 ALTER COLUMN b TYPE numeric;
\d gtest27
SELECT * FROM gtest27;
ALTER TABLE gtest27 ALTER COLUMN b TYPE boolean USING b <> 0; -- error
ALTER TABLE gtest27 ALTER COLUMN b DROP DEFAULT; -- error
\d gtest27
-- triggers
CREATE TABLE gtest26 (
a int PRIMARY KEY,
b int GENERATED ALWAYS AS (a * 2) STORED
);
CREATE FUNCTION gtest_trigger_func() RETURNS trigger
LANGUAGE plpgsql
AS $$
BEGIN
IF tg_op IN ('DELETE', 'UPDATE') THEN
RAISE INFO '%: %: old = %', TG_NAME, TG_WHEN, OLD;
END IF;
IF tg_op IN ('INSERT', 'UPDATE') THEN
RAISE INFO '%: %: new = %', TG_NAME, TG_WHEN, NEW;
END IF;
IF tg_op = 'DELETE' THEN
RETURN OLD;
ELSE
RETURN NEW;
END IF;
END
$$;
CREATE TRIGGER gtest1 BEFORE DELETE OR UPDATE ON gtest26
FOR EACH ROW
WHEN (OLD.b < 0) -- ok
EXECUTE PROCEDURE gtest_trigger_func();
CREATE TRIGGER gtest2a BEFORE INSERT OR UPDATE ON gtest26
FOR EACH ROW
WHEN (NEW.b < 0) -- error
EXECUTE PROCEDURE gtest_trigger_func();
CREATE TRIGGER gtest2b BEFORE INSERT OR UPDATE ON gtest26
FOR EACH ROW
WHEN (NEW.* IS NOT NULL) -- error
EXECUTE PROCEDURE gtest_trigger_func();
CREATE TRIGGER gtest2 BEFORE INSERT ON gtest26
FOR EACH ROW
WHEN (NEW.a < 0)
EXECUTE PROCEDURE gtest_trigger_func();
CREATE TRIGGER gtest3 AFTER DELETE OR UPDATE ON gtest26
FOR EACH ROW
WHEN (OLD.b < 0) -- ok
EXECUTE PROCEDURE gtest_trigger_func();
CREATE TRIGGER gtest4 AFTER INSERT OR UPDATE ON gtest26
FOR EACH ROW
WHEN (NEW.b < 0) -- ok
EXECUTE PROCEDURE gtest_trigger_func();
INSERT INTO gtest26 (a) VALUES (-2), (0), (3);
SELECT * FROM gtest26 ORDER BY a;
UPDATE gtest26 SET a = a * -2;
SELECT * FROM gtest26 ORDER BY a;
DELETE FROM gtest26 WHERE a = -6;
SELECT * FROM gtest26 ORDER BY a;
DROP TRIGGER gtest1 ON gtest26;
DROP TRIGGER gtest2 ON gtest26;
DROP TRIGGER gtest3 ON gtest26;
-- Check that an UPDATE of "a" fires the trigger for UPDATE OF b, per
-- SQL standard.
CREATE FUNCTION gtest_trigger_func3() RETURNS trigger
LANGUAGE plpgsql
AS $$
BEGIN
RAISE NOTICE 'OK';
RETURN NEW;
END
$$;
CREATE TRIGGER gtest11 BEFORE UPDATE OF b ON gtest26
FOR EACH ROW
EXECUTE PROCEDURE gtest_trigger_func3();
UPDATE gtest26 SET a = 1 WHERE a = 0;
DROP TRIGGER gtest11 ON gtest26;
TRUNCATE gtest26;
-- check that modifications of stored generated columns in triggers do
-- not get propagated
CREATE FUNCTION gtest_trigger_func4() RETURNS trigger
LANGUAGE plpgsql
AS $$
BEGIN
NEW.a = 10;
NEW.b = 300;
RETURN NEW;
END;
$$;
CREATE TRIGGER gtest12_01 BEFORE UPDATE ON gtest26
FOR EACH ROW
EXECUTE PROCEDURE gtest_trigger_func();
CREATE TRIGGER gtest12_02 BEFORE UPDATE ON gtest26
FOR EACH ROW
EXECUTE PROCEDURE gtest_trigger_func4();
CREATE TRIGGER gtest12_03 BEFORE UPDATE ON gtest26
FOR EACH ROW
EXECUTE PROCEDURE gtest_trigger_func();
INSERT INTO gtest26 (a) VALUES (1);
UPDATE gtest26 SET a = 11 WHERE a = 1;
SELECT * FROM gtest26 ORDER BY a;
-- LIKE INCLUDING GENERATED and dropped column handling
CREATE TABLE gtest28a (
a int,
b int,
c int,
x int GENERATED ALWAYS AS (b * 2) STORED
);
ALTER TABLE gtest28a DROP COLUMN a;
CREATE TABLE gtest28b (LIKE gtest28a INCLUDING GENERATED);
\d gtest28*

65
src/test/subscription/t/011_generated.pl Normal file
View File

@ -0,0 +1,65 @@
# Test generated columns
use strict;
use warnings;
use PostgresNode;
use TestLib;
use Test::More tests => 2;
# setup
my $node_publisher = get_new_node('publisher');
$node_publisher->init(allows_streaming => 'logical');
$node_publisher->start;
my $node_subscriber = get_new_node('subscriber');
$node_subscriber->init(allows_streaming => 'logical');
$node_subscriber->start;
my $publisher_connstr = $node_publisher->connstr . ' dbname=postgres';
$node_publisher->safe_psql('postgres',
"CREATE TABLE tab1 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED)");
$node_subscriber->safe_psql('postgres',
"CREATE TABLE tab1 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 22) STORED)");
# data for initial sync
$node_publisher->safe_psql('postgres',
"INSERT INTO tab1 (a) VALUES (1), (2), (3)");
$node_publisher->safe_psql('postgres',
"CREATE PUBLICATION pub1 FOR ALL TABLES");
$node_subscriber->safe_psql('postgres',
"CREATE SUBSCRIPTION sub1 CONNECTION '$publisher_connstr' PUBLICATION pub1"
);
# Wait for initial sync of all subscriptions
my $synced_query =
"SELECT count(1) = 0 FROM pg_subscription_rel WHERE srsubstate NOT IN ('r', 's');";
$node_subscriber->poll_query_until('postgres', $synced_query)
or die "Timed out while waiting for subscriber to synchronize data";
my $result = $node_subscriber->safe_psql('postgres',
"SELECT a, b FROM tab1");
is($result, qq(1|22
2|44
3|66), 'generated columns initial sync');
# data to replicate
$node_publisher->safe_psql('postgres',
"INSERT INTO tab1 VALUES (4), (5)");
$node_publisher->safe_psql('postgres',
"UPDATE tab1 SET a = 6 WHERE a = 5");
$node_publisher->wait_for_catchup('sub1');
$result = $node_subscriber->safe_psql('postgres',
"SELECT a, b FROM tab1");
is($result, qq(1|22
2|44
3|66
4|88
6|132), 'generated columns replicated');