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Support CREATE TABLE (LIKE ...) with foreign tables and views 

Composite types are not yet supported, because parserOpenTable()
rejects them.
This commit is contained in:
Peter Eisentraut 2012-01-10 21:46:29 +02:00
parent 07123dff77
commit a9f2e31cf6
4 changed files with 48 additions and 2 deletions
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5
doc/src/sgml/ref/create_table.sgml
View File

@ -368,6 +368,11 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXI
If the same name is specified explicitly or in another
<literal>LIKE</literal> clause, an error is signalled.
</para>
<para>
The <literal>LIKE</literal> clause can also be used to copy columns from
views or foreign tables. Inapplicable options (e.g., <literal>INCLUDING
INDEXES</literal> from a view) are ignored.
</para>
</listitem>
</varlistentry>

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

@ -644,10 +644,12 @@ transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_cla
relation = parserOpenTable(cxt->pstate, table_like_clause->relation,
AccessShareLock);
if (relation->rd_rel->relkind != RELKIND_RELATION)
if (relation->rd_rel->relkind != RELKIND_RELATION
&& relation->rd_rel->relkind != RELKIND_VIEW
&& relation->rd_rel->relkind != RELKIND_FOREIGN_TABLE)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("LIKE source relation \"%s\" is not a table",
errmsg("LIKE source relation \"%s\" is not a table, view, or foreign table",
table_like_clause->relation->relname)));
/*

19
src/test/regress/expected/create_table_like.out
View File

@ -220,3 +220,22 @@ 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
/* LIKE with other relation kinds */
CREATE TABLE ctlt4 (a int, b text);
CREATE SEQUENCE ctlseq1;
CREATE TABLE ctlt10 (LIKE ctlseq1); -- fail
ERROR: LIKE source relation "ctlseq1" is not a table, view, or foreign table
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);
CREATE TABLE ctlt12 (LIKE ctlty1); -- currently fails
ERROR: "ctlty1" is a composite type
LINE 1: CREATE TABLE ctlt12 (LIKE ctlty1);
^
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
NOTICE: table "ctlt12" does not exist, skipping

20
src/test/regress/sql/create_table_like.sql
View File

@ -97,3 +97,23 @@ CREATE TABLE inh_error1 () INHERITS (ctlt1, ctlt4);
CREATE TABLE inh_error2 (LIKE ctlt4 INCLUDING STORAGE) INHERITS (ctlt1);
DROP TABLE ctlt1, ctlt2, ctlt3, ctlt4, ctlt12_storage, ctlt12_comments, ctlt1_inh, ctlt13_inh, ctlt13_like, ctlt_all, ctla, ctlb CASCADE;
/* LIKE with other relation kinds */
CREATE TABLE ctlt4 (a int, b text);
CREATE SEQUENCE ctlseq1;
CREATE TABLE ctlt10 (LIKE ctlseq1); -- fail
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);
CREATE TABLE ctlt12 (LIKE ctlty1); -- currently fails
DROP SEQUENCE ctlseq1;
DROP TYPE ctlty1;
DROP VIEW ctlv1;
DROP TABLE IF EXISTS ctlt4, ctlt10, ctlt11, ctlt11a, ctlt12;