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Remove direct handling of reloptions for toast tables

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It doesn't actually work, even with allow_system_table_mods turned on:
the ALTER TABLE operation is rejected by ATSimplePermissions(), so even
the error message we're adding in this commit is unreachable.

Add a test case for it.

Author: Nikolay Shaplov <dhyan@nataraj.su>
Discussion: https://postgr.es/m/1913854.tdWV9SEqCh@thinkpad-pgpro
This commit is contained in:
Álvaro Herrera 2025-03-14 09:28:51 +01:00
parent 92fc6856cb
commit 1548c3a304
No known key found for this signature in database
GPG Key ID: 1C20ACB9D5C564AE
3 changed files with 13 additions and 1 deletions
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3
src/backend/commands/tablecmds.c
View File

@ -15963,7 +15963,6 @@ ATExecSetRelOptions(Relation rel, List *defList, AlterTableType operation,
switch (rel->rd_rel->relkind)
{
case RELKIND_RELATION:
case RELKIND_TOASTVALUE:
case RELKIND_MATVIEW:
(void) heap_reloptions(rel->rd_rel->relkind, newOptions, true);
break;
@ -15977,6 +15976,8 @@ ATExecSetRelOptions(Relation rel, List *defList, AlterTableType operation,
case RELKIND_PARTITIONED_INDEX:
(void) index_reloptions(rel->rd_indam->amoptions, newOptions, true);
break;
case RELKIND_TOASTVALUE:
/* fall through to error -- shouldn't ever get here */
default:
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),

7
src/test/modules/unsafe_tests/expected/alter_system_table.out
View File

@ -91,6 +91,9 @@ ERROR: permission denied: "pg_description" is a system catalog
SET allow_system_table_mods TO on;
DROP RULE r2 ON pg_description;
RESET allow_system_table_mods;
-- Reloptions on TOAST tables
ALTER TABLE pg_toast.pg_toast_2615 SET (fillfactor = '90');
ERROR: permission denied: "pg_toast_2615" is a system catalog
SET allow_system_table_mods = on;
-- create new table in pg_catalog
BEGIN;
@ -173,6 +176,10 @@ DROP TRIGGER t2 ON pg_description;
CREATE RULE r1 AS ON INSERT TO pg_description DO INSTEAD NOTHING;
ALTER RULE r1 ON pg_description RENAME TO r2;
DROP RULE r2 ON pg_description;
-- Reloptions on TOAST tables
ALTER TABLE pg_toast.pg_toast_2615 SET (fillfactor = '90');
ERROR: ALTER action SET cannot be performed on relation "pg_toast_2615"
DETAIL: This operation is not supported for TOAST tables.
-- cleanup
REVOKE ALL ON pg_description FROM regress_user_ast;
DROP USER regress_user_ast;

4
src/test/modules/unsafe_tests/sql/alter_system_table.sql
View File

@ -89,6 +89,8 @@ SET allow_system_table_mods TO on;
DROP RULE r2 ON pg_description;
RESET allow_system_table_mods;
-- Reloptions on TOAST tables
ALTER TABLE pg_toast.pg_toast_2615 SET (fillfactor = '90');
SET allow_system_table_mods = on;
@ -187,6 +189,8 @@ CREATE RULE r1 AS ON INSERT TO pg_description DO INSTEAD NOTHING;
ALTER RULE r1 ON pg_description RENAME TO r2;
DROP RULE r2 ON pg_description;
-- Reloptions on TOAST tables
ALTER TABLE pg_toast.pg_toast_2615 SET (fillfactor = '90');
-- cleanup
REVOKE ALL ON pg_description FROM regress_user_ast;