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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*-------------------------------------------------------------------------
*
* parse_coerce.h
*
* Routines for type coercion.
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_coerce.h,v 1.27 2001/03/22 04:00:57 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PARSE_COERCE_H
#define PARSE_COERCE_H
#include "catalog/pg_type.h"
#include "parser/parse_node.h"
typedef enum CATEGORY
{
INVALID_TYPE,
UNKNOWN_TYPE,
BOOLEAN_TYPE,
STRING_TYPE,
BITSTRING_TYPE,
NUMERIC_TYPE,
DATETIME_TYPE,
TIMESPAN_TYPE,
GEOMETRIC_TYPE,
NETWORK_TYPE,
USER_TYPE,
MIXED_TYPE
} CATEGORY;
/* IS_BUILTIN_TYPE()
* Check for types which are in the core distribution.
* The built-in types can have more explicit support for type coersion, etc,
* since we know apriori how they should behave.
* - thomas 1998-05-13
*/
#define IS_BUILTIN_TYPE(t) \
(((t) == OIDOID) \
|| ((t) == BOOLOID) \
|| ((t) == BPCHAROID) \
|| ((t) == VARCHAROID) \
|| ((t) == TEXTOID) \
|| ((t) == INT4OID) \
|| ((t) == INT8OID) \
|| ((t) == FLOAT8OID) \
|| ((t) == NUMERICOID) \
|| ((t) == TIMESTAMPOID) \
|| ((t) == INTERVALOID) \
|| ((t) == ABSTIMEOID) \
|| ((t) == RELTIMEOID) \
|| ((t) == DATEOID) \
|| ((t) == TIMEOID) \
|| ((t) == TIMETZOID) \
|| ((t) == CHAROID) \
|| ((t) == NAMEOID) \
|| ((t) == CASHOID) \
|| ((t) == POINTOID) \
|| ((t) == LSEGOID) \
|| ((t) == LINEOID) \
|| ((t) == BOXOID) \
|| ((t) == PATHOID) \
|| ((t) == POLYGONOID) \
|| ((t) == CIRCLEOID) \
|| ((t) == INETOID) \
|| ((t) == CIDROID) \
|| ((t) == ZPBITOID) \
|| ((t) == VARBITOID) )
/* IS_BINARY_COMPATIBLE()
* Check for types with the same underlying binary representation.
* This allows us to cheat and directly exchange values without
* going through the trouble of calling a conversion function.
*
* Remove equivalencing of FLOAT8 and TIMESTAMP. They really are not
* close enough in behavior, with the TIMESTAMP reserved values
* and special formatting. - thomas 1999-01-24
*/
#define IS_BINARY_COMPATIBLE(a,b) \
(((a) == BPCHAROID && (b) == TEXTOID) \
|| ((a) == BPCHAROID && (b) == VARCHAROID) \
|| ((a) == VARCHAROID && (b) == TEXTOID) \
|| ((a) == VARCHAROID && (b) == BPCHAROID) \
|| ((a) == TEXTOID && (b) == BPCHAROID) \
|| ((a) == TEXTOID && (b) == VARCHAROID) \
|| ((a) == OIDOID && (b) == INT4OID) \
|| ((a) == OIDOID && (b) == REGPROCOID) \
|| ((a) == INT4OID && (b) == OIDOID) \
|| ((a) == INT4OID && (b) == REGPROCOID) \
|| ((a) == REGPROCOID && (b) == OIDOID) \
|| ((a) == REGPROCOID && (b) == INT4OID) \
|| ((a) == ABSTIMEOID && (b) == INT4OID) \
|| ((a) == INT4OID && (b) == ABSTIMEOID) \
|| ((a) == RELTIMEOID && (b) == INT4OID) \
|| ((a) == INT4OID && (b) == RELTIMEOID) \
|| ((a) == INETOID && (b) == CIDROID) \
|| ((a) == CIDROID && (b) == INETOID) \
|| ((a) == ZPBITOID && (b) == VARBITOID) \
|| ((a) == VARBITOID && (b) == ZPBITOID))
/* IS_HIGHER_TYPE()
* These types are the most general in each of the type categories.
*/
#define IS_HIGHER_TYPE(t) \
(((t) == TEXTOID) \
|| ((t) == FLOAT8OID) \
|| ((t) == INTERVALOID) \
|| ((t) == TIMESTAMPOID) \
|| ((t) == POLYGONOID) \
|| ((t) == INETOID) )
/* IS_HIGHEST_TYPE()
* These types are the most general in each of the type categories.
* Since interval and timestamp overload so many functions, let's
* give timestamp the preference.
* Since text is a generic string type let's leave it out too.
*/
#define IS_HIGHEST_TYPE(t) \
(((t) == FLOAT8OID) \
|| ((t) == TIMESTAMPOID) \
|| ((t) == INTERVALOID))
extern bool IsPreferredType(CATEGORY category, Oid type);
extern CATEGORY TypeCategory(Oid type);
extern bool can_coerce_type(int nargs, Oid *input_typeids, Oid *func_typeids);
extern Node *coerce_type(ParseState *pstate, Node *node, Oid inputTypeId,
Oid targetTypeId, int32 atttypmod);
extern Node *coerce_type_typmod(ParseState *pstate, Node *node,
Oid targetTypeId, int32 atttypmod);
extern Oid select_common_type(List *typeids, const char *context);
extern Node *coerce_to_common_type(ParseState *pstate, Node *node,
Oid targetTypeId,
const char *context);
#endif /* PARSE_COERCE_H */
|
