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pgstat: Fix transactional stats dropping for indexes

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Because index creation does not go through heap_create_with_catalog() we
didn't call pgstat_create_relation(), leading to index stats of a newly
created realtion not getting dropped during rollback. To fix, move the
pgstat_create_relation() to heap_create(), which indexes do use.

Similarly, because dropping an index does not go through
heap_drop_with_catalog(), we didn't drop index stats when the transaction
dropping an index committed. Here there's no convenient common path for
indexes and relations, so index_drop() now calls pgstat_drop_relation().

Add tests for transactional index stats handling.

Author: "Drouvot, Bertrand" <bdrouvot@amazon.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Discussion: https://postgr.es/m/51bbf286-2b4a-8998-bd12-eaae4b765d99@amazon.com
Backpatch: 15-, like 8b1dccd37c, which introduced the bug
This commit is contained in:
Andres Freund
2022-09-23 13:00:55 -07:00
parent 0032a54567
commit d811ce6ea3
4 changed files with 161 additions and 7 deletions
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3
src/backend/catalog/index.c
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@@ -2325,6 +2325,9 @@ index_drop(Oid indexId, bool concurrent, bool concurrent_lock_mode)
if (RELKIND_HAS_STORAGE(userIndexRelation->rd_rel->relkind))
RelationDropStorage(userIndexRelation);
/* ensure that stats are dropped if transaction commits */
pgstat_drop_relation(userIndexRelation);
/*
* Close and flush the index's relcache entry, to ensure relcache doesn't
* try to rebuild it while we're deleting catalog entries. We keep the