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Allow pg_set_relation_stats() to set relpages to -1.

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While the default value for relpages is 0, if a partitioned table with
at least one child has been analyzed, then the partititoned table will
have a relpages value of -1.

Author: Corey Huinker
Discussion: https://postgr.es/m/CADkLM=fajh1Lpcyr_XsMmq-9Z=SGk-u+_Zeac7Pt0RAN3uiVCg@mail.gmail.com
This commit is contained in:
Jeff Davis
2024-10-18 10:44:15 -07:00
parent 1bd4bc85ca
commit b391d882ff
4 changed files with 70 additions and 4 deletions
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25
src/test/regress/sql/stats_import.sql
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@@ -95,4 +95,29 @@ SELECT
pg_catalog.pg_clear_relation_stats(
'stats_import.testview'::regclass);
-- relpages may be -1 for partitioned tables
CREATE TABLE stats_import.part_parent ( i integer ) PARTITION BY RANGE(i);
CREATE TABLE stats_import.part_child_1
PARTITION OF stats_import.part_parent
FOR VALUES FROM (0) TO (10);
ANALYZE stats_import.part_parent;
SELECT relpages
FROM pg_class
WHERE oid = 'stats_import.part_parent'::regclass;
-- although partitioned tables have no storage, setting relpages to a
-- positive value is still allowed
SELECT
pg_catalog.pg_set_relation_stats(
relation => 'stats_import.part_parent'::regclass,
relpages => 2::integer);
-- nothing stops us from setting it to -1
SELECT
pg_catalog.pg_set_relation_stats(
relation => 'stats_import.part_parent'::regclass,
relpages => -1::integer);
DROP SCHEMA stats_import CASCADE;