database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-12-19 17:02:53 +03:00
Code Activity

Fix amcheck's handling of incomplete root splits in B-tree

Browse Source 
When the root page is being split, it's normal that root page
according to the metapage is not marked BTP_ROOT. Fix bogus error in
amcheck about that case.

Reviewed-by: Peter Geoghegan <pg@bowt.ie>
Discussion: https://www.postgresql.org/message-id/abd65090-5336-42cc-b768-2bdd66738404@iki.fi
Backpatch-through: 14
This commit is contained in:
Heikki Linnakangas
2025-12-02 21:10:51 +02:00
parent 1e4e5783e7
commit 6c05ef5729
4 changed files with 16 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
contrib/amcheck/verify_nbtree.c
View File

@@ -721,7 +721,7 @@ bt_check_level_from_leftmost(BtreeCheckState *state, BtreeLevel level)
errmsg("block %u is not leftmost in index \"%s\"",
current, RelationGetRelationName(state->rel))));
if (level.istruerootlevel && !P_ISROOT(opaque))
if (level.istruerootlevel && (!P_ISROOT(opaque) && !P_INCOMPLETE_SPLIT(opaque)))
ereport(ERROR,
(errcode(ERRCODE_INDEX_CORRUPTED),
errmsg("block %u is not true root in index \"%s\"",

2
src/test/modules/nbtree/Makefile
View File

@@ -1,6 +1,6 @@
# src/test/modules/nbtree/Makefile
EXTRA_INSTALL = src/test/modules/injection_points
EXTRA_INSTALL = src/test/modules/injection_points contrib/amcheck
REGRESS = nbtree_incomplete_splits

7
src/test/modules/nbtree/expected/nbtree_incomplete_splits.out
View File

@@ -14,6 +14,7 @@
-- splits in "incomplete" state
set client_min_messages TO 'warning';
create extension if not exists injection_points;
create extension if not exists amcheck;
reset client_min_messages;
-- Make all injection points local to this process, for concurrency.
SELECT injection_points_set_local();
@@ -87,6 +88,12 @@ begin
if c <> 200 then
raise 'unexpected count % ', c;
end if;
-- Also check the index with amcheck. Both to test that the index is
-- valid, but also to test that amcheck doesn't wrongly complain
-- about incomplete splits.
perform bt_index_parent_check('nbtree_incomplete_splits_i_idx'::regclass, true, true);
return true;
end;
$$;

7
src/test/modules/nbtree/sql/nbtree_incomplete_splits.sql
View File

@@ -15,6 +15,7 @@
-- splits in "incomplete" state
set client_min_messages TO 'warning';
create extension if not exists injection_points;
create extension if not exists amcheck;
reset client_min_messages;
-- Make all injection points local to this process, for concurrency.
@@ -86,6 +87,12 @@ begin
if c <> 200 then
raise 'unexpected count % ', c;
end if;
-- Also check the index with amcheck. Both to test that the index is
-- valid, but also to test that amcheck doesn't wrongly complain
-- about incomplete splits.
perform bt_index_parent_check('nbtree_incomplete_splits_i_idx'::regclass, true, true);
return true;
end;
$$;