diff options
Diffstat (limited to 'src/backend/utils/cache/lsyscache.c')
| -rw-r--r-- | src/backend/utils/cache/lsyscache.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/backend/utils/cache/lsyscache.c b/src/backend/utils/cache/lsyscache.c index 80c5a3fcfb7..82031c1e8e5 100644 --- a/src/backend/utils/cache/lsyscache.c +++ b/src/backend/utils/cache/lsyscache.c @@ -185,6 +185,28 @@ get_opfamily_member(Oid opfamily, Oid lefttype, Oid righttype, } /* + * get_opfamily_member_for_cmptype + * Get the OID of the operator that implements the specified comparison + * type with the specified datatypes for the specified opfamily. + * + * Returns InvalidOid if there is no mapping for the comparison type or no + * pg_amop entry for the given keys. + */ +Oid +get_opfamily_member_for_cmptype(Oid opfamily, Oid lefttype, Oid righttype, + CompareType cmptype) +{ + Oid opmethod; + StrategyNumber strategy; + + opmethod = get_opfamily_method(opfamily); + strategy = IndexAmTranslateCompareType(cmptype, opmethod, opfamily, true); + if (!strategy) + return InvalidOid; + return get_opfamily_member(opfamily, lefttype, righttype, strategy); +} + +/* * get_ordering_op_properties * Given the OID of an ordering operator (a btree "<" or ">" operator), * determine its opfamily, its declared input datatype, and its @@ -1288,6 +1310,28 @@ get_opclass_method(Oid opclass) /* ---------- OPFAMILY CACHE ---------- */ +/* + * get_opfamily_method + * + * Returns the OID of the index access method the opfamily is for. + */ +Oid +get_opfamily_method(Oid opfid) +{ + HeapTuple tp; + Form_pg_opfamily opfform; + Oid result; + + tp = SearchSysCache1(OPFAMILYOID, ObjectIdGetDatum(opfid)); + if (!HeapTupleIsValid(tp)) + elog(ERROR, "cache lookup failed for operator family %u", opfid); + opfform = (Form_pg_opfamily) GETSTRUCT(tp); + + result = opfform->opfmethod; + ReleaseSysCache(tp); + return result; +} + char * get_opfamily_name(Oid opfid, bool missing_ok) { |