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Create functions pg_set_relation_stats, pg_clear_relation_stats.#54

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reshke merged 9 commits into
MDB_17_7from
zz
Nov 19, 2025
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Create functions pg_set_relation_stats, pg_clear_relation_stats.#54
reshke merged 9 commits into
MDB_17_7from
zz

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@reshke reshke commented Nov 19, 2025

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These functions are used to tweak statistics on any relation, provided that the user has MAINTAIN privilege on the relation, or is the database owner.

Bump catalog version.

Author: Corey Huinker
Discussion: https://postgr.es/m/CADkLM=eErgzn7ECDpwFcptJKOk9SxZEk5Pot4d94eVTZsvj3gw@mail.gmail.com

These functions are used to tweak statistics on any relation, provided
that the user has MAINTAIN privilege on the relation, or is the database
owner.

Bump catalog version.

Author: Corey Huinker
Discussion: https://postgr.es/m/CADkLM=eErgzn7ECDpwFcptJKOk9SxZEk5Pot4d94eVTZsvj3gw@mail.gmail.com
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
While we haven't observed any test instability, it seems like a good
idea to disable autovacuum during the stats import tests.

Author: Corey Huinker
Discussion: https://postgr.es/m/CADkLM=fajh1Lpcyr_XsMmq-9Z=SGk-u+_Zeac7Pt0RAN3uiVCg@mail.gmail.com
These functions will either raise an ERROR or run to normal
completion, so no return value is necessary.

Bump catalog version.

Author: Corey Huinker
Discussion: https://postgr.es/m/CADkLM=cBF8rnphuTyHFi3KYzB9ByDgx57HwK9Rz2yp7S+Om87w@mail.gmail.com
Enable manipulation of attribute statistics. Only superficial
validation is performed, so it's possible to add nonsense, and it's up
to the planner (or other users of statistics) to behave reasonably in
that case.

Bump catalog version.

Author: Corey Huinker
Discussion: https://postgr.es/m/CADkLM=eErgzn7ECDpwFcptJKOk9SxZEk5Pot4d94eVTZsvj3gw@mail.gmail.com
Previously, an invalid attribute name was caught, but the error
message was unhelpful.
Similar to the pg_set_*_stats() functions, except with a variadic
signature that's designed to be more future-proof. Additionally, most
problems are reported as WARNINGs rather than ERRORs, allowing most
stats to be restored even if some cannot.

These functions are intended to be called from pg_dump to avoid the
need to run ANALYZE after an upgrade.

Author: Corey Huinker
Discussion: https://postgr.es/m/CADkLM=eErgzn7ECDpwFcptJKOk9SxZEk5Pot4d94eVTZsvj3gw@mail.gmail.com
This matches the behavior of vac_update_relstats(), which is important
to avoid bloating pg_class.

Author: Corey Huinker
Discussion: https://postgr.es/m/CADkLM=fc3je+ufv3gsHqjjSSf+t8674RXpuXW62EL55MUEQd-g@mail.gmail.com
@reshke reshke merged commit 3c429b3 into MDB_17_7 Nov 19, 2025
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@reshke reshke deleted the zz branch December 23, 2025 11:55
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4 participants