diff options
Diffstat (limited to 'src/backend/commands/analyze.c')
| -rw-r--r-- | src/backend/commands/analyze.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/src/backend/commands/analyze.c b/src/backend/commands/analyze.c index deef865ce6d..a03495d6c95 100644 --- a/src/backend/commands/analyze.c +++ b/src/backend/commands/analyze.c @@ -1004,6 +1004,10 @@ static VacAttrStats * examine_attribute(Relation onerel, int attnum, Node *index_expr) { Form_pg_attribute attr = TupleDescAttr(onerel->rd_att, attnum - 1); + int attstattarget; + HeapTuple atttuple; + Datum dat; + bool isnull; HeapTuple typtuple; VacAttrStats *stats; int i; @@ -1013,15 +1017,28 @@ examine_attribute(Relation onerel, int attnum, Node *index_expr) if (attr->attisdropped) return NULL; + /* + * Get attstattarget value. Set to -1 if null. (Analyze functions expect + * -1 to mean use default_statistics_target; see for example + * std_typanalyze.) + */ + atttuple = SearchSysCache2(ATTNUM, ObjectIdGetDatum(RelationGetRelid(onerel)), Int16GetDatum(attnum)); + if (!HeapTupleIsValid(atttuple)) + elog(ERROR, "cache lookup failed for attribute %d of relation %u", + attnum, RelationGetRelid(onerel)); + dat = SysCacheGetAttr(ATTNUM, atttuple, Anum_pg_attribute_attstattarget, &isnull); + attstattarget = isnull ? -1 : DatumGetInt16(dat); + ReleaseSysCache(atttuple); + /* Don't analyze column if user has specified not to */ - if (attr->attstattarget == 0) + if (attstattarget == 0) return NULL; /* * Create the VacAttrStats struct. */ stats = (VacAttrStats *) palloc0(sizeof(VacAttrStats)); - stats->attstattarget = attr->attstattarget; + stats->attstattarget = attstattarget; /* * When analyzing an expression index, believe the expression tree's type |