6456810078
Implement TIME WITH TIME ZONE type (timetz internal type). Remap length() for character strings to CHAR_LENGTH() for SQL92 and to remove the ambiguity with geometric length() functions. Keep length() for character strings for backward compatibility. Shrink stored views by removing internal column name list from visible rte. Implement min(), max() for time and timetz data types. Implement conversion of TIME to INTERVAL. Implement abs(), mod(), fac() for the int8 data type. Rename some math functions to generic names: round(), sqrt(), cbrt(), pow(), etc. Rename NUMERIC power() function to pow(). Fix int2 factorial to calculate result in int4. Enhance the Oracle compatibility function translate() to work with string arguments (from Edwin Ramirez). Modify pg_proc system table to remove OID holes.
134 lines
3.9 KiB
C
134 lines
3.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* parse_coerce.h
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*
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* Routines for type coercion.
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*
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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: parse_coerce.h,v 1.19 2000/03/14 23:06:48 thomas 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) == NUMERICOID) \
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|| ((t) == TIMESTAMPOID) \
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|| ((t) == INTERVALOID) \
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|| ((t) == ABSTIMEOID) \
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|| ((t) == RELTIMEOID) \
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|| ((t) == DATEOID) \
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|| ((t) == TIMEOID) \
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|| ((t) == TIMETZOID) \
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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 TIMESTAMP. They really are not
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* close enough in behavior, with the TIMESTAMP 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) == INT4OID) \
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|| ((a) == INT4OID && (b) == ABSTIMEOID) \
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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) == INTERVALOID) \
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|| ((t) == TIMESTAMPOID) \
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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 interval and timestamp overload so many functions, let's
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* give timestamp 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) == TIMESTAMPOID) \
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|| ((t) == INTERVALOID))
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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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extern Node *coerce_type_typmod(ParseState *pstate, Node *node,
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Oid targetTypeId, int32 atttypmod);
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#endif /* PARSE_COERCE_H */
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