database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-27 12:41:57 +03:00
Code Activity

amcheck: Support for different header sizes of short varlena datum

Browse Source 
In the heap, tuples may contain short varlena datum with both 1B header and 4B
headers.  But the corresponding index tuple should always have such varlena's
with 1B headers.  So, for fingerprinting, we need to convert.

Backpatch to all supported versions.

Discussion: https://postgr.es/m/flat/7bdbe559-d61a-4ae4-a6e1-48abdf3024cc%40postgrespro.ru
Author: Michael Zhilin
Reviewed-by: Alexander Lakhin, Andrey Borodin, Jian He, Alexander Korotkov
Backpatch-through: 12
This commit is contained in:
Alexander Korotkov
2024-03-23 22:59:56 +02:00
parent 12128be623
commit 54e6184db3
3 changed files with 55 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
contrib/amcheck/sql/check_btree.sql
View File

@ -135,6 +135,16 @@ CREATE INDEX bttest_a_expr_idx ON bttest_a ((ifun(id) + ifun(0)))
SELECT bt_index_check('bttest_a_expr_idx', true);
-- Check support of both 1B and 4B header sizes of short varlena datum
CREATE TABLE varlena_bug (v text);
ALTER TABLE varlena_bug ALTER column v SET storage plain;
INSERT INTO varlena_bug VALUES ('x');
COPY varlena_bug from stdin;
x
\.
CREATE INDEX varlena_bug_idx on varlena_bug(v);
SELECT bt_index_check('varlena_bug_idx', true);
-- cleanup
DROP TABLE bttest_a;
DROP TABLE bttest_b;
@ -144,3 +154,4 @@ DROP TABLE toast_bug;
DROP FUNCTION ifun(int8);
DROP OWNED BY regress_bttest_role; -- permissions
DROP ROLE regress_bttest_role;
DROP TABLE varlena_bug;