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path: root/src/backend/utils/cache/lsyscache.c
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-rw-r--r--src/backend/utils/cache/lsyscache.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c
index 85c458bc46e..6bba5f8ec4e 100644
--- a/src/backend/utils/cache/lsyscache.c
+++ b/src/backend/utils/cache/lsyscache.c
@@ -872,6 +872,33 @@ get_attnum(Oid relid, const char *attname)
}
/*
+ * get_attstattarget
+ *
+ * Given the relation id and the attribute number,
+ * return the "attstattarget" field from the attribute relation.
+ *
+ * Errors if not found.
+ */
+int
+get_attstattarget(Oid relid, AttrNumber attnum)
+{
+ HeapTuple tp;
+ Form_pg_attribute att_tup;
+ int result;
+
+ tp = SearchSysCache2(ATTNUM,
+ ObjectIdGetDatum(relid),
+ Int16GetDatum(attnum));
+ if (!HeapTupleIsValid(tp))
+ elog(ERROR, "cache lookup failed for attribute %d of relation %u",
+ attnum, relid);
+ att_tup = (Form_pg_attribute) GETSTRUCT(tp);
+ result = att_tup->attstattarget;
+ ReleaseSysCache(tp);
+ return result;
+}
+
+/*
* get_attgenerated
*
* Given the relation id and the attribute number,