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131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_coerce.h
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*
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: parse_coerce.h,v 1.15 1999/07/16 17:07:36 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PARSE_COERCE_H
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#define PARSE_COERCE_H
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#include "catalog/pg_type.h"
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#include "parser/parse_node.h"
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typedef enum CATEGORY
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{
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INVALID_TYPE,
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UNKNOWN_TYPE,
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BOOLEAN_TYPE,
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STRING_TYPE,
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NUMERIC_TYPE,
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DATETIME_TYPE,
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TIMESPAN_TYPE,
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GEOMETRIC_TYPE,
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NETWORK_TYPE,
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USER_TYPE,
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MIXED_TYPE
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} CATEGORY;
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/* IS_BUILTIN_TYPE()
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* Check for types which are in the core distribution.
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* The built-in types can have more explicit support for type coersion, etc,
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* since we know apriori how they should behave.
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* - thomas 1998-05-13
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*/
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#define IS_BUILTIN_TYPE(t) \
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(((t) == OIDOID) \
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|| ((t) == BOOLOID) \
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|| ((t) == BPCHAROID) \
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|| ((t) == VARCHAROID) \
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|| ((t) == TEXTOID) \
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|| ((t) == INT4OID) \
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|| ((t) == INT8OID) \
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|| ((t) == FLOAT8OID) \
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|| ((t) == DATETIMEOID) \
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|| ((t) == TIMESTAMPOID) \
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|| ((t) == ABSTIMEOID) \
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|| ((t) == RELTIMEOID) \
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|| ((t) == CHAROID) \
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|| ((t) == NAMEOID) \
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|| ((t) == CASHOID) \
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|| ((t) == POINTOID) \
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|| ((t) == LSEGOID) \
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|| ((t) == LINEOID) \
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|| ((t) == BOXOID) \
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|| ((t) == PATHOID) \
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|| ((t) == POLYGONOID) \
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|| ((t) == CIRCLEOID) \
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|| ((t) == INETOID) \
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|| ((t) == CIDROID) )
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/* IS_BINARY_COMPATIBLE()
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* Check for types with the same underlying binary representation.
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* This allows us to cheat and directly exchange values without
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* going through the trouble of calling a conversion function.
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* Remove equivalencing of FLOAT8 and DATETIME. They really are not
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* close enough in behavior, with the DATETIME reserved values
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* and special formatting. - thomas 1999-01-24
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*/
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#define IS_BINARY_COMPATIBLE(a,b) \
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(((a) == BPCHAROID && (b) == TEXTOID) \
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|| ((a) == BPCHAROID && (b) == VARCHAROID) \
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|| ((a) == VARCHAROID && (b) == TEXTOID) \
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|| ((a) == VARCHAROID && (b) == BPCHAROID) \
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|| ((a) == TEXTOID && (b) == BPCHAROID) \
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|| ((a) == TEXTOID && (b) == VARCHAROID) \
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|| ((a) == OIDOID && (b) == INT4OID) \
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|| ((a) == OIDOID && (b) == REGPROCOID) \
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|| ((a) == INT4OID && (b) == OIDOID) \
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|| ((a) == INT4OID && (b) == REGPROCOID) \
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|| ((a) == REGPROCOID && (b) == OIDOID) \
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|| ((a) == REGPROCOID && (b) == INT4OID) \
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|| ((a) == ABSTIMEOID && (b) == TIMESTAMPOID) \
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|| ((a) == ABSTIMEOID && (b) == INT4OID) \
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|| ((a) == TIMESTAMPOID && (b) == ABSTIMEOID) \
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|| ((a) == TIMESTAMPOID && (b) == INT4OID) \
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|| ((a) == INT4OID && (b) == ABSTIMEOID) \
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|| ((a) == INT4OID && (b) == TIMESTAMPOID) \
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|| ((a) == RELTIMEOID && (b) == INT4OID) \
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|| ((a) == INT4OID && (b) == RELTIMEOID) \
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|| ((a) == INETOID && (b) == CIDROID) \
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|| ((a) == CIDROID && (b) == INETOID))
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/* IS_HIGHER_TYPE()
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* These types are the most general in each of the type categories.
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*/
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#define IS_HIGHER_TYPE(t) \
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(((t) == TEXTOID) \
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|| ((t) == FLOAT8OID) \
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|| ((t) == TIMESPANOID) \
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|| ((t) == DATETIMEOID) \
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|| ((t) == POLYGONOID) \
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|| ((t) == INETOID) )
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/* IS_HIGHEST_TYPE()
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* These types are the most general in each of the type categories.
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* Since timespan and datetime overload so many functions, let's
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* give datetime the preference.
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* Since text is a generic string type let's leave it out too.
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*/
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#define IS_HIGHEST_TYPE(t) \
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(((t) == FLOAT8OID) \
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|| ((t) == DATETIMEOID) \
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|| ((t) == TIMESPANOID))
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extern bool IsPreferredType(CATEGORY category, Oid type);
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extern CATEGORY TypeCategory(Oid type);
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extern bool can_coerce_type(int nargs, Oid *input_typeids, Oid *func_typeids);
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extern Node *coerce_type(ParseState *pstate, Node *node, Oid inputTypeId,
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Oid targetTypeId, int32 atttypmod);
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#endif /* PARSE_COERCE_H */
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