| /*------------------------------------------------------------------------- |
| * |
| * parse_oper.h |
| * handle operator things for parser |
| * |
| * |
| * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group |
| * Portions Copyright (c) 1994, Regents of the University of California |
| * |
| * $PostgreSQL: pgsql/src/include/parser/parse_oper.h,v 1.40 2006/10/04 00:30:09 momjian Exp $ |
| * |
| *------------------------------------------------------------------------- |
| */ |
| #ifndef PARSE_OPER_H |
| #define PARSE_OPER_H |
| |
| #include "access/htup.h" |
| #include "parser/parse_node.h" |
| |
| typedef HeapTuple Operator; |
| |
| #define ReleaseOperator(fmw) ReleaseSysCache((fmw)) |
| |
| /* Routines to look up an operator given name and exact input type(s) */ |
| extern Oid LookupOperName(ParseState *pstate, List *opername, |
| Oid oprleft, Oid oprright, |
| bool noError, int location); |
| extern Oid LookupOperNameTypeNames(ParseState *pstate, List *opername, |
| TypeName *oprleft, TypeName *oprright, |
| bool noError, int location); |
| |
| /* 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(ParseState *pstate, List *op, Oid arg1, Oid arg2, |
| bool noError, int location); |
| extern Operator right_oper(ParseState *pstate, List *op, Oid arg, |
| bool noError, int location); |
| extern Operator left_oper(ParseState *pstate, List *op, Oid arg, |
| bool noError, int location); |
| |
| /* 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(ParseState *pstate, List *op, |
| Oid arg1, Oid arg2, |
| bool noError, int location); |
| |
| /* currently no need for compatible_left_oper/compatible_right_oper */ |
| |
| /* Routines for identifying "=", "<", ">" operators for a type */ |
| extern Operator equality_oper(Oid argtype, bool noError); |
| extern Operator ordering_oper(Oid argtype, bool noError); |
| extern Operator reverse_ordering_oper(Oid argtype, bool noError); |
| |
| /* Convenience routines for common calls on the above */ |
| extern Oid compatible_oper_opid(List *op, Oid arg1, Oid arg2, bool noError); |
| extern Oid equality_oper_funcid(Oid argtype); |
| extern Oid ordering_oper_funcid(Oid argtype); |
| extern Oid ordering_oper_opid(Oid argtype); |
| extern Oid reverse_ordering_oper_opid(Oid argtype); |
| |
| /* Extract operator OID or underlying-function OID from an Operator tuple */ |
| extern Oid oprid(Operator op); |
| extern Oid oprfuncid(Operator op); |
| |
| /* Build expression tree for an operator invocation */ |
| extern Expr *make_op(ParseState *pstate, List *opname, |
| Node *ltree, Node *rtree, int location); |
| extern Expr *make_scalar_array_op(ParseState *pstate, List *opname, |
| bool useOr, |
| Node *ltree, Node *rtree, int location); |
| |
| #endif /* PARSE_OPER_H */ |