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Implement ALTER TABLE .. SET LOGGED / UNLOGGED

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This enables changing permanent (logged) tables to unlogged and
vice-versa.

(Docs for ALTER TABLE / SET TABLESPACE got shuffled in an order that
hopefully makes more sense than the original.)

Author: Fabrízio de Royes Mello
Reviewed by: Christoph Berg, Andres Freund, Thom Brown
Some tweaking by Álvaro Herrera
This commit is contained in:
Alvaro Herrera
2014-08-22 14:27:00 -04:00
parent 01d15a2677
commit f41872d0c1
11 changed files with 472 additions and 55 deletions
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52
src/test/regress/sql/alter_table.sql
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@ -1624,3 +1624,55 @@ TRUNCATE old_system_table;
ALTER TABLE old_system_table DROP CONSTRAINT new_system_table_pkey;
ALTER TABLE old_system_table DROP COLUMN othercol;
DROP TABLE old_system_table;
-- set logged
CREATE UNLOGGED TABLE unlogged1(f1 SERIAL PRIMARY KEY, f2 TEXT);
-- check relpersistence of an unlogged table
SELECT relname, relkind, relpersistence FROM pg_class WHERE relname ~ '^unlogged1'
UNION ALL
SELECT 'toast table', t.relkind, t.relpersistence FROM pg_class r JOIN pg_class t ON t.oid = r.reltoastrelid WHERE r.relname ~ '^unlogged1'
UNION ALL
SELECT 'toast index', ri.relkind, ri.relpersistence FROM pg_class r join pg_class t ON t.oid = r.reltoastrelid JOIN pg_index i ON i.indrelid = t.oid JOIN pg_class ri ON ri.oid = i.indexrelid WHERE r.relname ~ '^unlogged1'
ORDER BY relname;
CREATE UNLOGGED TABLE unlogged2(f1 SERIAL PRIMARY KEY, f2 INTEGER REFERENCES unlogged1); -- foreign key
CREATE UNLOGGED TABLE unlogged3(f1 SERIAL PRIMARY KEY, f2 INTEGER REFERENCES unlogged3); -- self-referencing foreign key
ALTER TABLE unlogged3 SET LOGGED; -- skip self-referencing foreign key
ALTER TABLE unlogged2 SET LOGGED; -- fails because a foreign key to an unlogged table exists
ALTER TABLE unlogged1 SET LOGGED;
-- check relpersistence of an unlogged table after changing to permament
SELECT relname, relkind, relpersistence FROM pg_class WHERE relname ~ '^unlogged1'
UNION ALL
SELECT 'toast table', t.relkind, t.relpersistence FROM pg_class r JOIN pg_class t ON t.oid = r.reltoastrelid WHERE r.relname ~ '^unlogged1'
UNION ALL
SELECT 'toast index', ri.relkind, ri.relpersistence FROM pg_class r join pg_class t ON t.oid = r.reltoastrelid JOIN pg_index i ON i.indrelid = t.oid JOIN pg_class ri ON ri.oid = i.indexrelid WHERE r.relname ~ '^unlogged1'
ORDER BY relname;
ALTER TABLE unlogged1 SET LOGGED; -- silently do nothing
DROP TABLE unlogged3;
DROP TABLE unlogged2;
DROP TABLE unlogged1;
-- set unlogged
CREATE TABLE logged1(f1 SERIAL PRIMARY KEY, f2 TEXT);
-- check relpersistence of a permanent table
SELECT relname, relkind, relpersistence FROM pg_class WHERE relname ~ '^logged1'
UNION ALL
SELECT 'toast table', t.relkind, t.relpersistence FROM pg_class r JOIN pg_class t ON t.oid = r.reltoastrelid WHERE r.relname ~ '^logged1'
UNION ALL
SELECT 'toast index', ri.relkind, ri.relpersistence FROM pg_class r join pg_class t ON t.oid = r.reltoastrelid JOIN pg_index i ON i.indrelid = t.oid JOIN pg_class ri ON ri.oid = i.indexrelid WHERE r.relname ~ '^logged1'
ORDER BY relname;
CREATE TABLE logged2(f1 SERIAL PRIMARY KEY, f2 INTEGER REFERENCES logged1); -- foreign key
CREATE TABLE logged3(f1 SERIAL PRIMARY KEY, f2 INTEGER REFERENCES logged3); -- self-referencing foreign key
ALTER TABLE logged1 SET UNLOGGED; -- fails because a foreign key from a permanent table exists
ALTER TABLE logged3 SET UNLOGGED; -- skip self-referencing foreign key
ALTER TABLE logged2 SET UNLOGGED;
ALTER TABLE logged1 SET UNLOGGED;
-- check relpersistence of a permanent table after changing to unlogged
SELECT relname, relkind, relpersistence FROM pg_class WHERE relname ~ '^logged1'
UNION ALL
SELECT 'toast table', t.relkind, t.relpersistence FROM pg_class r JOIN pg_class t ON t.oid = r.reltoastrelid WHERE r.relname ~ '^logged1'
UNION ALL
SELECT 'toast index', ri.relkind, ri.relpersistence FROM pg_class r join pg_class t ON t.oid = r.reltoastrelid JOIN pg_index i ON i.indrelid = t.oid JOIN pg_class ri ON ri.oid = i.indexrelid WHERE r.relname ~ '^logged1'
ORDER BY relname;
ALTER TABLE logged1 SET UNLOGGED; -- silently do nothing
DROP TABLE logged3;
DROP TABLE logged2;
DROP TABLE logged1;