1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*-------------------------------------------------------------------------
*
* parse_func.h
*
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_func.h,v 1.35 2001/11/05 17:46:35 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PARSER_FUNC_H
#define PARSER_FUNC_H
#include "parser/parse_node.h"
/*
* This structure is used to explore the inheritance hierarchy above
* nodes in the type tree in order to disambiguate among polymorphic
* functions.
*/
typedef struct _InhPaths
{
int nsupers; /* number of superclasses */
Oid self; /* this class */
Oid *supervec; /* vector of superclasses */
} InhPaths;
/*
* This structure holds a list of possible functions or operators that
* agree with the known name and argument types of the function/operator.
*/
typedef struct _CandidateList
{
Oid *args;
struct _CandidateList *next;
} *CandidateList;
/* Result codes for func_get_detail */
typedef enum
{
FUNCDETAIL_NOTFOUND, /* no suitable interpretation */
FUNCDETAIL_NORMAL, /* found a matching function */
FUNCDETAIL_COERCION /* it's a type coercion request */
} FuncDetailCode;
extern Node *ParseNestedFuncOrColumn(ParseState *pstate, Attr *attr,
int precedence);
extern Node *ParseFuncOrColumn(ParseState *pstate,
char *funcname, List *fargs,
bool agg_star, bool agg_distinct,
int precedence);
extern FuncDetailCode func_get_detail(char *funcname, List *fargs,
int nargs, Oid *argtypes,
Oid *funcid, Oid *rettype,
bool *retset, Oid **true_typeids);
extern bool typeInheritsFrom(Oid subclassTypeId, Oid superclassTypeId);
extern void func_error(char *caller, char *funcname,
int nargs, Oid *argtypes, char *msg);
#endif /* PARSE_FUNC_H */
|
