index c13c08a97b4871c58451a675659d34e688fdc8ce..27602fa49c6b5c3677403e4363ecc4530bb664f1 100644 (file)
*
* Given the index OID and column number,
* return opclass of the index column
- * or InvalidOid if the index was not found.
+ * or InvalidOid if the index was not found
+ * or column is non-key one.
*/
Oid
get_index_column_opclass(Oid index_oid, int attno)
/* caller is supposed to guarantee this */
Assert(attno > 0 && attno <= rd_index->indnatts);
+ /* Non-key attributes don't have an opclass */
+ if (attno > rd_index->indnkeyatts)
+ {
+ ReleaseSysCache(tuple);
+ return InvalidOid;
+ }
+
datum = SysCacheGetAttr(INDEXRELID, tuple,
Anum_pg_index_indclass, &isnull);
Assert(!isnull);
indclass = ((oidvector *) DatumGetPointer(datum));
+
+ Assert(attno <= indclass->dim1);
opclass = indclass->values[attno - 1];
ReleaseSysCache(tuple);