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Allow ALTER TABLE name {OF type | NOT OF}.

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This syntax allows a standalone table to be made into a typed table,
or a typed table to be made standalone.  This is possibly a mildly
useful feature in its own right, but the real motivation for this
change is that we need it to make pg_upgrade work with typed tables.
This doesn't actually fix that problem, but it's necessary
infrastructure.

Noah Misch
This commit is contained in:
Robert Haas
2011-04-20 21:35:15 -04:00
parent 520bcd9c9b
commit 68739ba856
8 changed files with 376 additions and 38 deletions
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30
src/test/regress/sql/alter_table.sql
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@ -1369,3 +1369,33 @@ ALTER TYPE test_type2 RENAME ATTRIBUTE a TO aa CASCADE;
CREATE TYPE test_type_empty AS ();
DROP TYPE test_type_empty;
--
-- typed tables: OF / NOT OF
--
CREATE TYPE tt_t0 AS (z inet, x int, y numeric(8,2));
ALTER TYPE tt_t0 DROP ATTRIBUTE z;
CREATE TABLE tt0 (x int NOT NULL, y numeric(8,2)); -- OK
CREATE TABLE tt1 (x int, y bigint); -- wrong base type
CREATE TABLE tt2 (x int, y numeric(9,2)); -- wrong typmod
CREATE TABLE tt3 (y numeric(8,2), x int); -- wrong column order
CREATE TABLE tt4 (x int); -- too few columns
CREATE TABLE tt5 (x int, y numeric(8,2), z int); -- too few columns
CREATE TABLE tt6 () INHERITS (tt0); -- can't have a parent
CREATE TABLE tt7 (x int, q text, y numeric(8,2)) WITH OIDS;
ALTER TABLE tt7 DROP q; -- OK
ALTER TABLE tt0 OF tt_t0;
ALTER TABLE tt1 OF tt_t0;
ALTER TABLE tt2 OF tt_t0;
ALTER TABLE tt3 OF tt_t0;
ALTER TABLE tt4 OF tt_t0;
ALTER TABLE tt5 OF tt_t0;
ALTER TABLE tt6 OF tt_t0;
ALTER TABLE tt7 OF tt_t0;
CREATE TYPE tt_t1 AS (x int, y numeric(8,2));
ALTER TABLE tt7 OF tt_t1; -- reassign an already-typed table
ALTER TABLE tt7 NOT OF;
\d tt7