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amcheck: Normalize index tuples containing uncompressed varlena

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It might happen that the varlena value wasn't compressed by index_form_tuple()
due to current storage parameters.  If compression is currently enabled, we
need to compress such values to match index tuple coming from the heap.

Backpatch to all supported versions.

Discussion: https://postgr.es/m/flat/7bdbe559-d61a-4ae4-a6e1-48abdf3024cc%40postgrespro.ru
Author: Andrey Borodin
Reviewed-by: Alexander Lakhin, Michael Zhilin, Jian He, Alexander Korotkov
Backpatch-through: 12
This commit is contained in:
Alexander Korotkov
2024-03-23 23:00:06 +02:00
parent ab65dfb0fb
commit b1fe8efdf1
3 changed files with 29 additions and 0 deletions
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6
contrib/amcheck/sql/check_btree.sql
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@ -158,6 +158,12 @@ x
CREATE INDEX varlena_bug_idx on varlena_bug(v);
SELECT bt_index_check('varlena_bug_idx', true);
-- Also check that we compress varlena values, which were previously stored
-- uncompressed in index.
INSERT INTO varlena_bug VALUES (repeat('Test', 250));
ALTER TABLE varlena_bug ALTER COLUMN v SET STORAGE extended;
SELECT bt_index_check('varlena_bug_idx', true);
-- cleanup
DROP TABLE bttest_a;
DROP TABLE bttest_b;