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66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_oper.h
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* handle operator things for parser
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*
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*
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/parser/parse_oper.h,v 1.34 2003/11/29 22:41:09 pgsql Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PARSE_OPER_H
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#define PARSE_OPER_H
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#include "access/htup.h"
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#include "parser/parse_node.h"
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typedef HeapTuple Operator;
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/* Routines to look up an operator given name and exact input type(s) */
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extern Oid LookupOperName(List *opername, Oid oprleft, Oid oprright,
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bool noError);
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extern Oid LookupOperNameTypeNames(List *opername, TypeName *oprleft,
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TypeName *oprright, bool noError);
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/* Routines to find operators matching a name and given input types */
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/* NB: the selected operator may require coercion of the input types! */
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extern Operator oper(List *op, Oid arg1, Oid arg2, bool noError);
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extern Operator right_oper(List *op, Oid arg, bool noError);
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extern Operator left_oper(List *op, Oid arg, bool noError);
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/* Routines to find operators that DO NOT require coercion --- ie, their */
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/* input types are either exactly as given, or binary-compatible */
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extern Operator compatible_oper(List *op, Oid arg1, Oid arg2, bool noError);
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/* currently no need for compatible_left_oper/compatible_right_oper */
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/* Routines for identifying "=", "<", ">" operators for a type */
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extern Operator equality_oper(Oid argtype, bool noError);
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extern Operator ordering_oper(Oid argtype, bool noError);
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extern Operator reverse_ordering_oper(Oid argtype, bool noError);
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/* Convenience routines for common calls on the above */
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extern Oid compatible_oper_opid(List *op, Oid arg1, Oid arg2, bool noError);
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extern Oid equality_oper_funcid(Oid argtype);
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extern Oid ordering_oper_opid(Oid argtype);
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extern Oid reverse_ordering_oper_opid(Oid argtype);
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/* Extract operator OID or underlying-function OID from an Operator tuple */
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extern Oid oprid(Operator op);
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extern Oid oprfuncid(Operator op);
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/* Build expression tree for an operator invocation */
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extern Expr *make_op(ParseState *pstate, List *opname,
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Node *ltree, Node *rtree);
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extern Expr *make_scalar_array_op(ParseState *pstate, List *opname,
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bool useOr,
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Node *ltree, Node *rtree);
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extern Expr *make_op_expr(ParseState *pstate, Operator op,
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Node *ltree, Node *rtree,
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Oid ltypeId, Oid rtypeId);
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#endif /* PARSE_OPER_H */
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