2012-01-07 13:58:13 +01:00
/* Test inheritance of structure (LIKE) */
CREATE TABLE inhx (xx text DEFAULT 'text');
/*
* Test double inheritance
*
* Ensure that defaults are NOT included unless
* INCLUDING DEFAULTS is specified
*/
CREATE TABLE ctla (aa TEXT);
CREATE TABLE ctlb (bb TEXT) INHERITS (ctla);
2012-03-03 15:03:05 +01:00
CREATE TABLE foo (LIKE nonexistent);
ERROR: relation "nonexistent" does not exist
LINE 1: CREATE TABLE foo (LIKE nonexistent);
^
2012-01-07 13:58:13 +01:00
CREATE TABLE inhe (ee text, LIKE inhx) inherits (ctlb);
INSERT INTO inhe VALUES ('ee-col1', 'ee-col2', DEFAULT, 'ee-col4');
SELECT * FROM inhe; /* Columns aa, bb, xx value NULL, ee */
aa | bb | ee | xx
---------+---------+----+---------
ee-col1 | ee-col2 | | ee-col4
(1 row)
SELECT * FROM inhx; /* Empty set since LIKE inherits structure only */
xx
----
(0 rows)
SELECT * FROM ctlb; /* Has ee entry */
aa | bb
---------+---------
ee-col1 | ee-col2
(1 row)
SELECT * FROM ctla; /* Has ee entry */
aa
---------
ee-col1
(1 row)
CREATE TABLE inhf (LIKE inhx, LIKE inhx); /* Throw error */
ERROR: column "xx" specified more than once
CREATE TABLE inhf (LIKE inhx INCLUDING DEFAULTS INCLUDING CONSTRAINTS);
INSERT INTO inhf DEFAULT VALUES;
SELECT * FROM inhf; /* Single entry with value 'text' */
xx
------
text
(1 row)
ALTER TABLE inhx add constraint foo CHECK (xx = 'text');
ALTER TABLE inhx ADD PRIMARY KEY (xx);
CREATE TABLE inhg (LIKE inhx); /* Doesn't copy constraint */
INSERT INTO inhg VALUES ('foo');
DROP TABLE inhg;
CREATE TABLE inhg (x text, LIKE inhx INCLUDING CONSTRAINTS, y text); /* Copies constraints */
INSERT INTO inhg VALUES ('x', 'text', 'y'); /* Succeeds */
INSERT INTO inhg VALUES ('x', 'text', 'y'); /* Succeeds -- Unique constraints not copied */
INSERT INTO inhg VALUES ('x', 'foo', 'y'); /* fails due to constraint */
ERROR: new row for relation "inhg" violates check constraint "foo"
DETAIL: Failing row contains (x, foo, y).
SELECT * FROM inhg; /* Two records with three columns in order x=x, xx=text, y=y */
x | xx | y
---+------+---
x | text | y
x | text | y
(2 rows)
DROP TABLE inhg;
2018-03-07 20:38:35 +01:00
CREATE TABLE test_like_id_1 (a bigint GENERATED ALWAYS AS IDENTITY, b text);
2017-04-06 14:33:16 +02:00
\d test_like_id_1
Table "public.test_like_id_1"
2018-03-07 20:38:35 +01:00
Column | Type | Collation | Nullable | Default
--------+--------+-----------+----------+------------------------------
a | bigint | | not null | generated always as identity
b | text | | |
2017-04-06 14:33:16 +02:00
INSERT INTO test_like_id_1 (b) VALUES ('b1');
SELECT * FROM test_like_id_1;
a | b
---+----
1 | b1
(1 row)
CREATE TABLE test_like_id_2 (LIKE test_like_id_1);
\d test_like_id_2
2018-03-07 20:38:35 +01:00
Table "public.test_like_id_2"
Column | Type | Collation | Nullable | Default
--------+--------+-----------+----------+---------
a | bigint | | not null |
b | text | | |
2017-04-06 14:33:16 +02:00
INSERT INTO test_like_id_2 (b) VALUES ('b2');
ERROR: null value in column "a" violates not-null constraint
DETAIL: Failing row contains (null, b2).
SELECT * FROM test_like_id_2; -- identity was not copied
a | b
---+---
(0 rows)
CREATE TABLE test_like_id_3 (LIKE test_like_id_1 INCLUDING IDENTITY);
\d test_like_id_3
Table "public.test_like_id_3"
2018-03-07 20:38:35 +01:00
Column | Type | Collation | Nullable | Default
--------+--------+-----------+----------+------------------------------
a | bigint | | not null | generated always as identity
b | text | | |
2017-04-06 14:33:16 +02:00
INSERT INTO test_like_id_3 (b) VALUES ('b3');
SELECT * FROM test_like_id_3; -- identity was copied and applied
a | b
---+----
1 | b3
(1 row)
DROP TABLE test_like_id_1, test_like_id_2, test_like_id_3;
2019-03-30 08:13:09 +01:00
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;
2019-09-25 23:30:42 +02:00
CREATE TABLE test_like_4 (a int, b int DEFAULT 42, c int GENERATED ALWAYS AS (a * 2) STORED);
\d test_like_4
Table "public.test_like_4"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
a | integer | | |
b | integer | | | 42
c | integer | | | generated always as (a * 2) stored
CREATE TABLE test_like_4a (LIKE test_like_4);
CREATE TABLE test_like_4b (LIKE test_like_4 INCLUDING DEFAULTS);
CREATE TABLE test_like_4c (LIKE test_like_4 INCLUDING GENERATED);
CREATE TABLE test_like_4d (LIKE test_like_4 INCLUDING DEFAULTS INCLUDING GENERATED);
\d test_like_4a
Table "public.test_like_4a"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+---------
a | integer | | |
b | integer | | |
c | integer | | |
INSERT INTO test_like_4a VALUES(11);
TABLE test_like_4a;
a | b | c
----+---+---
11 | |
(1 row)
\d test_like_4b
Table "public.test_like_4b"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+---------
a | integer | | |
b | integer | | | 42
c | integer | | |
INSERT INTO test_like_4b VALUES(11);
TABLE test_like_4b;
a | b | c
----+----+---
11 | 42 |
(1 row)
\d test_like_4c
Table "public.test_like_4c"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
a | integer | | |
b | integer | | |
c | integer | | | generated always as (a * 2) stored
INSERT INTO test_like_4c VALUES(11);
TABLE test_like_4c;
a | b | c
----+---+----
11 | | 22
(1 row)
\d test_like_4d
Table "public.test_like_4d"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+------------------------------------
a | integer | | |
b | integer | | | 42
c | integer | | | generated always as (a * 2) stored
INSERT INTO test_like_4d VALUES(11);
TABLE test_like_4d;
a | b | c
----+----+----
11 | 42 | 22
(1 row)
DROP TABLE test_like_4, test_like_4a, test_like_4b, test_like_4c, test_like_4d;
2012-01-07 13:58:13 +01:00
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
ERROR: duplicate key value violates unique constraint "inhg_pkey"
DETAIL: Key (xx)=(10) already exists.
DROP TABLE inhg;
/* Multiple primary keys creation should fail */
CREATE TABLE inhg (x text, LIKE inhx INCLUDING INDEXES, PRIMARY KEY(x)); /* fails */
ERROR: multiple primary keys for table "inhg" are not allowed
CREATE TABLE inhz (xx text DEFAULT 'text', yy int UNIQUE);
CREATE UNIQUE INDEX inhz_xx_idx on inhz (xx) WHERE xx <> 'test';
/* Ok to create multiple unique indexes */
CREATE TABLE inhg (x text UNIQUE, LIKE inhz INCLUDING INDEXES);
INSERT INTO inhg (xx, yy, x) VALUES ('test', 5, 10);
INSERT INTO inhg (xx, yy, x) VALUES ('test', 10, 15);
INSERT INTO inhg (xx, yy, x) VALUES ('foo', 10, 15); -- should fail
ERROR: duplicate key value violates unique constraint "inhg_x_key"
DETAIL: Key (x)=(15) already exists.
DROP TABLE inhg;
DROP TABLE inhz;
-- including storage and comments
CREATE TABLE ctlt1 (a text CHECK (length(a) > 2) PRIMARY KEY, b text);
CREATE INDEX ctlt1_b_key ON ctlt1 (b);
CREATE INDEX ctlt1_fnidx ON ctlt1 ((a || b));
Clone extended stats in CREATE TABLE (LIKE INCLUDING ALL)
The LIKE INCLUDING ALL clause to CREATE TABLE intuitively indicates
cloning of extended statistics on the source table, but it failed to do
so. Patch it up so that it does. Also include an INCLUDING STATISTICS
option to the LIKE clause, so that the behavior can be requested
individually, or excluded individually.
While at it, reorder the INCLUDING options, both in code and in docs, in
alphabetical order which makes more sense than feature-implementation
order that was previously used.
Backpatch this to Postgres 10, where extended statistics were
introduced, because this is seen as an oversight in a fresh feature
which is better to get consistent from the get-go instead of changing
only in pg11.
In pg11, comments on statistics objects are cloned too. In pg10 they
are not, because I (Álvaro) was too coward to change the parse node as
required to support it. Also, in pg10 I chose not to renumber the
parser symbols for the various INCLUDING options in LIKE, for the same
reason. Any corresponding user-visible changes (docs) are backpatched,
though.
Reported-by: Stephen Froehlich
Author: David Rowley
Reviewed-by: Álvaro Herrera, Tomas Vondra
Discussion: https://postgr.es/m/CY1PR0601MB1927315B45667A1B679D0FD5E5EF0@CY1PR0601MB1927.namprd06.prod.outlook.com
2018-03-05 23:37:19 +01:00
CREATE STATISTICS ctlt1_a_b_stat ON a,b FROM ctlt1;
COMMENT ON STATISTICS ctlt1_a_b_stat IS 'ab stats';
2012-01-07 13:58:13 +01:00
COMMENT ON COLUMN ctlt1.a IS 'A';
COMMENT ON COLUMN ctlt1.b IS 'B';
COMMENT ON CONSTRAINT ctlt1_a_check ON ctlt1 IS 't1_a_check';
COMMENT ON INDEX ctlt1_pkey IS 'index pkey';
COMMENT ON INDEX ctlt1_b_key IS 'index b_key';
ALTER TABLE ctlt1 ALTER COLUMN a SET STORAGE MAIN;
CREATE TABLE ctlt2 (c text);
ALTER TABLE ctlt2 ALTER COLUMN c SET STORAGE EXTERNAL;
COMMENT ON COLUMN ctlt2.c IS 'C';
CREATE TABLE ctlt3 (a text CHECK (length(a) < 5), c text);
ALTER TABLE ctlt3 ALTER COLUMN c SET STORAGE EXTERNAL;
ALTER TABLE ctlt3 ALTER COLUMN a SET STORAGE MAIN;
COMMENT ON COLUMN ctlt3.a IS 'A3';
COMMENT ON COLUMN ctlt3.c IS 'C';
COMMENT ON CONSTRAINT ctlt3_a_check ON ctlt3 IS 't3_a_check';
CREATE TABLE ctlt4 (a text, c text);
ALTER TABLE ctlt4 ALTER COLUMN c SET STORAGE EXTERNAL;
CREATE TABLE ctlt12_storage (LIKE ctlt1 INCLUDING STORAGE, LIKE ctlt2 INCLUDING STORAGE);
\d+ ctlt12_storage
2016-11-03 17:00:00 +01:00
Table "public.ctlt12_storage"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
--------+------+-----------+----------+---------+----------+--------------+-------------
a | text | | not null | | main | |
b | text | | | | extended | |
c | text | | | | external | |
2012-01-07 13:58:13 +01:00
CREATE TABLE ctlt12_comments (LIKE ctlt1 INCLUDING COMMENTS, LIKE ctlt2 INCLUDING COMMENTS);
\d+ ctlt12_comments
2016-11-03 17:00:00 +01:00
Table "public.ctlt12_comments"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
--------+------+-----------+----------+---------+----------+--------------+-------------
a | text | | not null | | extended | | A
b | text | | | | extended | | B
c | text | | | | extended | | C
2012-01-07 13:58:13 +01:00
CREATE TABLE ctlt1_inh (LIKE ctlt1 INCLUDING CONSTRAINTS INCLUDING COMMENTS) INHERITS (ctlt1);
NOTICE: merging column "a" with inherited definition
NOTICE: merging column "b" with inherited definition
NOTICE: merging constraint "ctlt1_a_check" with inherited definition
\d+ ctlt1_inh
2016-11-03 17:00:00 +01:00
Table "public.ctlt1_inh"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
--------+------+-----------+----------+---------+----------+--------------+-------------
a | text | | not null | | main | | A
b | text | | | | extended | | B
2012-01-07 13:58:13 +01:00
Check constraints:
"ctlt1_a_check" CHECK (length(a) > 2)
Inherits: ctlt1
SELECT description FROM pg_description, pg_constraint c WHERE classoid = 'pg_constraint'::regclass AND objoid = c.oid AND c.conrelid = 'ctlt1_inh'::regclass;
description
-------------
t1_a_check
(1 row)
CREATE TABLE ctlt13_inh () INHERITS (ctlt1, ctlt3);
NOTICE: merging multiple inherited definitions of column "a"
\d+ ctlt13_inh
2016-11-03 17:00:00 +01:00
Table "public.ctlt13_inh"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
--------+------+-----------+----------+---------+----------+--------------+-------------
a | text | | not null | | main | |
b | text | | | | extended | |
c | text | | | | external | |
2012-01-07 13:58:13 +01:00
Check constraints:
"ctlt1_a_check" CHECK (length(a) > 2)
"ctlt3_a_check" CHECK (length(a) < 5)
Inherits: ctlt1,
ctlt3
CREATE TABLE ctlt13_like (LIKE ctlt3 INCLUDING CONSTRAINTS INCLUDING COMMENTS INCLUDING STORAGE) INHERITS (ctlt1);
NOTICE: merging column "a" with inherited definition
\d+ ctlt13_like
2016-11-03 17:00:00 +01:00
Table "public.ctlt13_like"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
--------+------+-----------+----------+---------+----------+--------------+-------------
a | text | | not null | | main | | A3
b | text | | | | extended | |
c | text | | | | external | | C
2012-01-07 13:58:13 +01:00
Check constraints:
"ctlt1_a_check" CHECK (length(a) > 2)
"ctlt3_a_check" CHECK (length(a) < 5)
Inherits: ctlt1
SELECT description FROM pg_description, pg_constraint c WHERE classoid = 'pg_constraint'::regclass AND objoid = c.oid AND c.conrelid = 'ctlt13_like'::regclass;
description
-------------
t3_a_check
(1 row)
CREATE TABLE ctlt_all (LIKE ctlt1 INCLUDING ALL);
\d+ ctlt_all
2016-11-03 17:00:00 +01:00
Table "public.ctlt_all"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
--------+------+-----------+----------+---------+----------+--------------+-------------
a | text | | not null | | main | | A
b | text | | | | extended | | B
2012-01-07 13:58:13 +01:00
Indexes:
"ctlt_all_pkey" PRIMARY KEY, btree (a)
"ctlt_all_b_idx" btree (b)
"ctlt_all_expr_idx" btree ((a || b))
Check constraints:
"ctlt1_a_check" CHECK (length(a) > 2)
Clone extended stats in CREATE TABLE (LIKE INCLUDING ALL)
The LIKE INCLUDING ALL clause to CREATE TABLE intuitively indicates
cloning of extended statistics on the source table, but it failed to do
so. Patch it up so that it does. Also include an INCLUDING STATISTICS
option to the LIKE clause, so that the behavior can be requested
individually, or excluded individually.
While at it, reorder the INCLUDING options, both in code and in docs, in
alphabetical order which makes more sense than feature-implementation
order that was previously used.
Backpatch this to Postgres 10, where extended statistics were
introduced, because this is seen as an oversight in a fresh feature
which is better to get consistent from the get-go instead of changing
only in pg11.
In pg11, comments on statistics objects are cloned too. In pg10 they
are not, because I (Álvaro) was too coward to change the parse node as
required to support it. Also, in pg10 I chose not to renumber the
parser symbols for the various INCLUDING options in LIKE, for the same
reason. Any corresponding user-visible changes (docs) are backpatched,
though.
Reported-by: Stephen Froehlich
Author: David Rowley
Reviewed-by: Álvaro Herrera, Tomas Vondra
Discussion: https://postgr.es/m/CY1PR0601MB1927315B45667A1B679D0FD5E5EF0@CY1PR0601MB1927.namprd06.prod.outlook.com
2018-03-05 23:37:19 +01:00
Statistics objects:
Add support for multivariate MCV lists
Introduce a third extended statistic type, supported by the CREATE
STATISTICS command - MCV lists, a generalization of the statistic
already built and used for individual columns.
Compared to the already supported types (n-distinct coefficients and
functional dependencies), MCV lists are more complex, include column
values and allow estimation of much wider range of common clauses
(equality and inequality conditions, IS NULL, IS NOT NULL etc.).
Similarly to the other types, a new pseudo-type (pg_mcv_list) is used.
Author: Tomas Vondra
Reviewed-by: Dean Rasheed, David Rowley, Mark Dilger, Alvaro Herrera
Discussion: https://postgr.es/m/dfdac334-9cf2-2597-fb27-f0fb3753f435@2ndquadrant.com
2019-03-27 18:32:18 +01:00
"public"."ctlt_all_a_b_stat" (ndistinct, dependencies, mcv) ON a, b FROM ctlt_all
2012-01-07 13:58:13 +01:00
SELECT c.relname, objsubid, description FROM pg_description, pg_index i, pg_class c WHERE classoid = 'pg_class'::regclass AND objoid = i.indexrelid AND c.oid = i.indexrelid AND i.indrelid = 'ctlt_all'::regclass ORDER BY c.relname, objsubid;
relname | objsubid | description
----------------+----------+-------------
ctlt_all_b_idx | 0 | index b_key
ctlt_all_pkey | 0 | index pkey
(2 rows)
Clone extended stats in CREATE TABLE (LIKE INCLUDING ALL)
The LIKE INCLUDING ALL clause to CREATE TABLE intuitively indicates
cloning of extended statistics on the source table, but it failed to do
so. Patch it up so that it does. Also include an INCLUDING STATISTICS
option to the LIKE clause, so that the behavior can be requested
individually, or excluded individually.
While at it, reorder the INCLUDING options, both in code and in docs, in
alphabetical order which makes more sense than feature-implementation
order that was previously used.
Backpatch this to Postgres 10, where extended statistics were
introduced, because this is seen as an oversight in a fresh feature
which is better to get consistent from the get-go instead of changing
only in pg11.
In pg11, comments on statistics objects are cloned too. In pg10 they
are not, because I (Álvaro) was too coward to change the parse node as
required to support it. Also, in pg10 I chose not to renumber the
parser symbols for the various INCLUDING options in LIKE, for the same
reason. Any corresponding user-visible changes (docs) are backpatched,
though.
Reported-by: Stephen Froehlich
Author: David Rowley
Reviewed-by: Álvaro Herrera, Tomas Vondra
Discussion: https://postgr.es/m/CY1PR0601MB1927315B45667A1B679D0FD5E5EF0@CY1PR0601MB1927.namprd06.prod.outlook.com
2018-03-05 23:37:19 +01:00
SELECT s.stxname, objsubid, description FROM pg_description, pg_statistic_ext s WHERE classoid = 'pg_statistic_ext'::regclass AND objoid = s.oid AND s.stxrelid = 'ctlt_all'::regclass ORDER BY s.stxname, objsubid;
stxname | objsubid | description
-------------------+----------+-------------
ctlt_all_a_b_stat | 0 | ab stats
(1 row)
2012-01-07 13:58:13 +01:00
CREATE TABLE inh_error1 () INHERITS (ctlt1, ctlt4);
NOTICE: merging multiple inherited definitions of column "a"
ERROR: inherited column "a" has a storage parameter conflict
DETAIL: MAIN versus EXTENDED
CREATE TABLE inh_error2 (LIKE ctlt4 INCLUDING STORAGE) INHERITS (ctlt1);
NOTICE: merging column "a" with inherited definition
ERROR: column "a" has a storage parameter conflict
DETAIL: MAIN versus EXTENDED
DROP TABLE ctlt1, ctlt2, ctlt3, ctlt4, ctlt12_storage, ctlt12_comments, ctlt1_inh, ctlt13_inh, ctlt13_like, ctlt_all, ctla, ctlb CASCADE;
NOTICE: drop cascades to table inhe
2012-01-10 20:46:29 +01:00
/* LIKE with other relation kinds */
CREATE TABLE ctlt4 (a int, b text);
CREATE SEQUENCE ctlseq1;
CREATE TABLE ctlt10 (LIKE ctlseq1); -- fail
2013-07-05 21:25:51 +02:00
ERROR: "ctlseq1" is not a table, view, materialized view, composite type, or foreign table
2012-03-03 15:03:05 +01:00
LINE 1: CREATE TABLE ctlt10 (LIKE ctlseq1);
^
2012-01-10 20:46:29 +01:00
CREATE VIEW ctlv1 AS SELECT * FROM ctlt4;
CREATE TABLE ctlt11 (LIKE ctlv1);
CREATE TABLE ctlt11a (LIKE ctlv1 INCLUDING ALL);
CREATE TYPE ctlty1 AS (a int, b text);
2012-03-03 15:03:05 +01:00
CREATE TABLE ctlt12 (LIKE ctlty1);
2012-01-10 20:46:29 +01:00
DROP SEQUENCE ctlseq1;
DROP TYPE ctlty1;
DROP VIEW ctlv1;
DROP TABLE IF EXISTS ctlt4, ctlt10, ctlt11, ctlt11a, ctlt12;
NOTICE: table "ctlt10" does not exist, skipping