diff options
Diffstat (limited to 'src/backend/utils/cache/lsyscache.c')
| -rw-r--r-- | src/backend/utils/cache/lsyscache.c | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c index 9beae0d9ef..cbdfe05031 100644 --- a/src/backend/utils/cache/lsyscache.c +++ b/src/backend/utils/cache/lsyscache.c @@ -86,18 +86,41 @@ get_op_opfamily_strategy(Oid opno, Oid opfamily) } /* + * get_op_opfamily_sortfamily + * + * If the operator is an ordering operator within the specified opfamily, + * return its amopsortfamily OID; else return InvalidOid. + */ +Oid +get_op_opfamily_sortfamily(Oid opno, Oid opfamily) +{ + HeapTuple tp; + Form_pg_amop amop_tup; + Oid result; + + tp = SearchSysCache3(AMOPOPID, + ObjectIdGetDatum(opno), + CharGetDatum(AMOP_ORDER), + ObjectIdGetDatum(opfamily)); + if (!HeapTupleIsValid(tp)) + return InvalidOid; + amop_tup = (Form_pg_amop) GETSTRUCT(tp); + result = amop_tup->amopsortfamily; + ReleaseSysCache(tp); + return result; +} + +/* * get_op_opfamily_properties * * Get the operator's strategy number and declared input data types * within the specified opfamily. * - * This function only considers search operators, not ordering operators. - * * Caller should already have verified that opno is a member of opfamily, * therefore we raise an error if the tuple is not found. */ void -get_op_opfamily_properties(Oid opno, Oid opfamily, +get_op_opfamily_properties(Oid opno, Oid opfamily, bool ordering_op, int *strategy, Oid *lefttype, Oid *righttype) @@ -107,7 +130,7 @@ get_op_opfamily_properties(Oid opno, Oid opfamily, tp = SearchSysCache3(AMOPOPID, ObjectIdGetDatum(opno), - CharGetDatum(AMOP_SEARCH), + CharGetDatum(ordering_op ? AMOP_ORDER : AMOP_SEARCH), ObjectIdGetDatum(opfamily)); if (!HeapTupleIsValid(tp)) elog(ERROR, "operator %u is not a member of opfamily %u", |