1/*-------------------------------------------------------------------------
2 *
3 * parse_oper.h
4 * handle operator things for parser
5 *
6 *
7 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
8 * Portions Copyright (c) 1994, Regents of the University of California
9 *
10 * src/include/parser/parse_oper.h
11 *
12 *-------------------------------------------------------------------------
13 */
14#ifndef PARSE_OPER_H
15#define PARSE_OPER_H
16
17#include "access/htup.h"
18#include "nodes/parsenodes.h"
19#include "parser/parse_node.h"
20
21
22typedef HeapTuple Operator;
23
24/* Routines to look up an operator given name and exact input type(s) */
25extern Oid LookupOperName(ParseState *pstate, List *opername,
26 Oid oprleft, Oid oprright,
27 bool noError, int location);
28extern Oid LookupOperWithArgs(ObjectWithArgs *oper, bool noError);
29
30/* Routines to find operators matching a name and given input types */
31/* NB: the selected operator may require coercion of the input types! */
32extern Operator oper(ParseState *pstate, List *op, Oid arg1, Oid arg2,
33 bool noError, int location);
34extern Operator right_oper(ParseState *pstate, List *op, Oid arg,
35 bool noError, int location);
36extern Operator left_oper(ParseState *pstate, List *op, Oid arg,
37 bool noError, int location);
38
39/* Routines to find operators that DO NOT require coercion --- ie, their */
40/* input types are either exactly as given, or binary-compatible */
41extern Operator compatible_oper(ParseState *pstate, List *op,
42 Oid arg1, Oid arg2,
43 bool noError, int location);
44
45/* currently no need for compatible_left_oper/compatible_right_oper */
46
47/* Routines for identifying "<", "=", ">" operators for a type */
48extern void get_sort_group_operators(Oid argtype,
49 bool needLT, bool needEQ, bool needGT,
50 Oid *ltOpr, Oid *eqOpr, Oid *gtOpr,
51 bool *isHashable);
52
53/* Convenience routines for common calls on the above */
54extern Oid compatible_oper_opid(List *op, Oid arg1, Oid arg2, bool noError);
55
56/* Extract operator OID or underlying-function OID from an Operator tuple */
57extern Oid oprid(Operator op);
58extern Oid oprfuncid(Operator op);
59
60/* Build expression tree for an operator invocation */
61extern Expr *make_op(ParseState *pstate, List *opname,
62 Node *ltree, Node *rtree, Node *last_srf, int location);
63extern Expr *make_scalar_array_op(ParseState *pstate, List *opname,
64 bool useOr,
65 Node *ltree, Node *rtree, int location);
66
67#endif /* PARSE_OPER_H */
68