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Add functions pg_restore_relation_stats(), pg_restore_attribute_stats().

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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 commit is contained in:
Jeff Davis
2024-10-24 12:08:00 -07:00
parent 534d0ea6c2
commit d32d146399
9 changed files with 1891 additions and 92 deletions
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19
src/backend/statistics/attribute_stats.c
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@@ -877,3 +877,22 @@ pg_clear_attribute_stats(PG_FUNCTION_ARGS)
delete_pg_statistic(reloid, attnum, inherited);
PG_RETURN_VOID();
}
Datum
pg_restore_attribute_stats(PG_FUNCTION_ARGS)
{
LOCAL_FCINFO(positional_fcinfo, NUM_ATTRIBUTE_STATS_ARGS);
bool result = true;
InitFunctionCallInfoData(*positional_fcinfo, NULL, NUM_ATTRIBUTE_STATS_ARGS,
InvalidOid, NULL, NULL);
if (!stats_fill_fcinfo_from_arg_pairs(fcinfo, positional_fcinfo,
attarginfo, WARNING))
result = false;
if (!attribute_statistics_update(positional_fcinfo, WARNING))
result = false;
PG_RETURN_BOOL(result);
}