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Make pg_get_statisticsobjdef_expressions return NULL 

The usual behavior for functions in ruleutils.c is to return NULL when
the object does not exist. pg_get_statisticsobjdef_expressions raised an
error instead, so correct that.

Reported-by: Justin Pryzby
Discussion: https://postgr.es/m/20210505210947.GA27406%40telsasoft.com
This commit is contained in:
Tomas Vondra 2021-05-07 13:56:32 +02:00
parent b65431ca5e
commit 8d4b311d24
1 changed files with 2 additions and 2 deletions
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4
src/backend/utils/adt/ruleutils.c
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@ -1759,9 +1759,9 @@ pg_get_statisticsobjdef_expressions(PG_FUNCTION_ARGS)
statexttup = SearchSysCache1(STATEXTOID, ObjectIdGetDatum(statextid));
if (!HeapTupleIsValid(statexttup))
elog(ERROR, "cache lookup failed for statistics object %u", statextid);
PG_RETURN_NULL();
/* has the statistics expressions? */
/* Does the stats object have expressions? */
has_exprs = !heap_attisnull(statexttup, Anum_pg_statistic_ext_stxexprs, NULL);
/* no expressions? we're done */