diff options
Diffstat (limited to 'src/include/parser/parse_oper.h')
| -rw-r--r-- | src/include/parser/parse_oper.h | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/src/include/parser/parse_oper.h b/src/include/parser/parse_oper.h index 6867addea51..069a9d5be27 100644 --- a/src/include/parser/parse_oper.h +++ b/src/include/parser/parse_oper.h @@ -1,13 +1,13 @@ /*------------------------------------------------------------------------- * - * catalog_utils.h + * parse_oper.h * * * * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: parse_oper.h,v 1.13 2001/01/24 19:43:27 momjian Exp $ + * $Id: parse_oper.h,v 1.14 2001/02/16 03:16:58 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -18,13 +18,27 @@ typedef HeapTuple Operator; +/* Routines to find operators matching a name and given input types */ +/* NB: the selected operator may require coercion of the input types! */ extern Operator oper(char *op, Oid arg1, Oid arg2, bool noError); extern Operator right_oper(char *op, Oid arg); extern Operator left_oper(char *op, Oid arg); -extern Oid oper_oid(char *op, Oid arg1, Oid arg2, bool noError); -extern Oid oprid(Operator op); +/* Routines to find operators that DO NOT require coercion --- ie, their */ +/* input types are either exactly as given, or binary-compatible */ +extern Operator compatible_oper(char *op, Oid arg1, Oid arg2, bool noError); +/* currently no need for compatible_left_oper/compatible_right_oper */ + +/* Convenience routines that call compatible_oper() and return either */ +/* the operator OID or the underlying function OID, or InvalidOid if fail */ +extern Oid compatible_oper_opid(char *op, Oid arg1, Oid arg2, bool noError); +extern Oid compatible_oper_funcid(char *op, Oid arg1, Oid arg2, bool noError); -extern Oid any_ordering_op(Oid restype); +/* Convenience routine that packages a specific call on compatible_oper */ +extern Oid any_ordering_op(Oid argtype); + +/* Extract operator OID or underlying-function OID from an Operator tuple */ +extern Oid oprid(Operator op); +extern Oid oprfuncid(Operator op); #endif /* PARSE_OPER_H */ |