parse_oper.h

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/*-------------------------------------------------------------------------
 *
 * parse_oper.h
 *      handle operator things for parser
 *
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/parser/parse_oper.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef PARSE_OPER_H
#define PARSE_OPER_H
 
#include "access/htup.h"
#include "nodes/parsenodes.h"
#include "parser/parse_node.h"
 
 
typedef HeapTuple Operator;
 
/* 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  LookupOperWithArgs(ObjectWithArgs *oper, bool noError);
 
/* 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 *opname, Oid ltypeId,
                     Oid rtypeId, 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 */
 
/* Error reporting support */
extern const char *op_signature_string(List *op, Oid arg1, Oid arg2);
 
/* Routines for identifying "<", "=", ">" operators for a type */
extern void get_sort_group_operators(Oid argtype,
                                     bool needLT, bool needEQ, bool needGT,
                                     Oid *ltOpr, Oid *eqOpr, Oid *gtOpr,
                                     bool *isHashable);
 
/* Convenience routines for common calls on the above */
extern Oid  compatible_oper_opid(List *op, Oid arg1, Oid arg2, bool noError);
 
/* 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, Node *last_srf, int location);
extern Expr *make_scalar_array_op(ParseState *pstate, List *opname,
                                  bool useOr,
                                  Node *ltree, Node *rtree, int location);
 
#endif                          /* PARSE_OPER_H */