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45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_oper.h
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*
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*
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*
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* Portions Copyright (c) 1996-2001, 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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* $Id: parse_oper.h,v 1.17 2001/10/28 06:26:08 momjian 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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typedef HeapTuple Operator;
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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(char *op, Oid arg1, Oid arg2, bool noError);
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extern Operator right_oper(char *op, Oid arg);
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extern Operator left_oper(char *op, Oid arg);
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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(char *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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/* Convenience routines that call compatible_oper() and return either */
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/* the operator OID or the underlying function OID, or InvalidOid if fail */
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extern Oid compatible_oper_opid(char *op, Oid arg1, Oid arg2, bool noError);
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extern Oid compatible_oper_funcid(char *op, Oid arg1, Oid arg2, bool noError);
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/* Convenience routine that packages a specific call on compatible_oper */
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extern Oid any_ordering_op(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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#endif /* PARSE_OPER_H */
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