mirror of
https://github.com/postgres/postgres.git
synced 2026-04-28 01:26:56 -04:00
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
|
/*-------------------------------------------------------------------------
|
||
|
|
*
|
||
|
|
* parse_coerce.h
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* Copyright (c) 1994, Regents of the University of California
|
||
|
|
*
|
||
|
|
* $Id: parse_coerce.h,v 1.1 1998/05/09 23:31:34 thomas Exp $
|
||
|
|
*
|
||
|
|
*-------------------------------------------------------------------------
|
||
|
|
*/
|
||
|
|
#ifndef PARSE_COERCE_H
|
||
|
|
#define PARSE_COERCE_H
|
||
|
|
|
||
|
|
typedef enum CATEGORY {
|
||
|
|
INVALID_TYPE,
|
||
|
|
UNKNOWN_TYPE,
|
||
|
|
BOOLEAN_TYPE,
|
||
|
|
STRING_TYPE,
|
||
|
|
NUMERIC_TYPE,
|
||
|
|
DATETIME_TYPE,
|
||
|
|
TIMESPAN_TYPE,
|
||
|
|
GEOMETRIC_TYPE,
|
||
|
|
USER_TYPE,
|
||
|
|
MIXED_TYPE
|
||
|
|
} CATEGORY;
|
||
|
|
|
||
|
|
|
||
|
|
#define IS_BUILTIN_TYPE(t) \
|
||
|
|
(((t) == BOOLOID) \
|
||
|
|
|| ((t) == BPCHAROID) \
|
||
|
|
|| ((t) == VARCHAROID) \
|
||
|
|
|| ((t) == TEXTOID) \
|
||
|
|
|| ((t) == CASHOID) \
|
||
|
|
|| ((t) == INT4OID) \
|
||
|
|
|| ((t) == DATETIMEOID) \
|
||
|
|
|| ((t) == FLOAT8OID) \
|
||
|
|
|| ((t) == ABSTIMEOID) \
|
||
|
|
|| ((t) == TIMESTAMPOID) \
|
||
|
|
|| ((t) == RELTIMEOID))
|
||
|
|
|
||
|
|
|
||
|
|
/* 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.
|
||
|
|
*/
|
||
|
|
#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) == CASHOID && (b) == INT4OID) \
|
||
|
|
|| ((a) == INT4OID && (b) == CASHOID) \
|
||
|
|
|| ((a) == DATETIMEOID && (b) == FLOAT8OID) \
|
||
|
|
|| ((a) == FLOAT8OID && (b) == DATETIMEOID) \
|
||
|
|
|| ((a) == ABSTIMEOID && (b) == TIMESTAMPOID) \
|
||
|
|
|| ((a) == TIMESTAMPOID && (b) == ABSTIMEOID) \
|
||
|
|
|| ((a) == ABSTIMEOID && (b) == INT4OID) \
|
||
|
|
|| ((a) == INT4OID && (b) == ABSTIMEOID) \
|
||
|
|
|| ((a) == RELTIMEOID && (b) == INT4OID) \
|
||
|
|
|| ((a) == INT4OID && (b) == RELTIMEOID))
|
||
|
|
|
||
|
|
/* 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) == TIMESPANOID) \
|
||
|
|
|| ((t) == DATETIMEOID) \
|
||
|
|
|| ((t) == POLYGONOID))
|
||
|
|
|
||
|
|
/* IS_HIGHEST_TYPE()
|
||
|
|
* These types are the most general in each of the type categories.
|
||
|
|
* Since timespan and datetime overload so many functions, let's
|
||
|
|
* give datetime the preference.
|
||
|
|
* Since text is a generic string type let's leave it out too.
|
||
|
|
*/
|
||
|
|
#define IS_HIGHEST_TYPE(t) \
|
||
|
|
(((t) == FLOAT8OID) \
|
||
|
|
|| ((t) == DATETIMEOID) \
|
||
|
|
|| ((t) == TIMESPANOID))
|
||
|
|
|
||
|
|
|
||
|
|
extern bool IsPreferredType(CATEGORY category, Oid type);
|
||
|
|
extern Oid PreferredType(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);
|
||
|
|
|
||
|
|
#endif /* PARSE_COERCE_H */
|