Viewing file:  pg_cast.h (11.48 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*-------------------------------------------------------------------------
*
* pg_cast.h
* definition of the system "type casts" relation (pg_cast)
* along with the relation's initial contents.
*
* As of Postgres 8.0, pg_cast describes not only type coercion functions
* but also length coercion functions.
*
*
* Copyright (c) 2002-2012, PostgreSQL Global Development Group
*
* src/include/catalog/pg_cast.h
*
* NOTES
* the genbki.pl script reads this file and generates .bki
* information from the DATA() statements.
*
*-------------------------------------------------------------------------
*/
#ifndef PG_CAST_H
#define PG_CAST_H
#include "catalog/genbki.h"
/* ----------------
* pg_cast definition. cpp turns this into
* typedef struct FormData_pg_cast
* ----------------
*/
#define CastRelationId 2605
CATALOG(pg_cast,2605)
{
Oid castsource; /* source datatype for cast */
Oid casttarget; /* destination datatype for cast */
Oid castfunc; /* cast function; 0 = binary coercible */
char castcontext; /* contexts in which cast can be used */
char castmethod; /* cast method */
} FormData_pg_cast;
typedef FormData_pg_cast *Form_pg_cast;
/*
* The allowable values for pg_cast.castcontext are specified by this enum.
* Since castcontext is stored as a "char", we use ASCII codes for human
* convenience in reading the table. Note that internally to the backend,
* these values are converted to the CoercionContext enum (see primnodes.h),
* which is defined to sort in a convenient order; the ASCII codes don't
* have to sort in any special order.
*/
typedef enum CoercionCodes
{
COERCION_CODE_IMPLICIT = 'i', /* coercion in context of expression */
COERCION_CODE_ASSIGNMENT = 'a', /* coercion in context of assignment */
COERCION_CODE_EXPLICIT = 'e' /* explicit cast operation */
} CoercionCodes;
/*
* The allowable values for pg_cast.castmethod are specified by this enum.
* Since castmethod is stored as a "char", we use ASCII codes for human
* convenience in reading the table.
*/
typedef enum CoercionMethod
{
COERCION_METHOD_FUNCTION = 'f', /* use a function */
COERCION_METHOD_BINARY = 'b', /* types are binary-compatible */
COERCION_METHOD_INOUT = 'i' /* use input/output functions */
} CoercionMethod;
/* ----------------
* compiler constants for pg_cast
* ----------------
*/
#define Natts_pg_cast 5
#define Anum_pg_cast_castsource 1
#define Anum_pg_cast_casttarget 2
#define Anum_pg_cast_castfunc 3
#define Anum_pg_cast_castcontext 4
#define Anum_pg_cast_castmethod 5
/* ----------------
* initial contents of pg_cast
*
* Note: this table has OIDs, but we don't bother to assign them manually,
* since nothing needs to know the specific OID of any built-in cast.
* ----------------
*/
/*
* Numeric category: implicit casts are allowed in the direction
* int2->int4->int8->numeric->float4->float8, while casts in the
* reverse direction are assignment-only.
*/
DATA(insert ( 20 21 714 a f ));
DATA(insert ( 20 23 480 a f ));
DATA(insert ( 20 700 652 i f ));
DATA(insert ( 20 701 482 i f ));
DATA(insert ( 20 1700 1781 i f ));
DATA(insert ( 21 20 754 i f ));
DATA(insert ( 21 23 313 i f ));
DATA(insert ( 21 700 236 i f ));
DATA(insert ( 21 701 235 i f ));
DATA(insert ( 21 1700 1782 i f ));
DATA(insert ( 23 20 481 i f ));
DATA(insert ( 23 21 314 a f ));
DATA(insert ( 23 700 318 i f ));
DATA(insert ( 23 701 316 i f ));
DATA(insert ( 23 1700 1740 i f ));
DATA(insert ( 700 20 653 a f ));
DATA(insert ( 700 21 238 a f ));
DATA(insert ( 700 23 319 a f ));
DATA(insert ( 700 701 311 i f ));
DATA(insert ( 700 1700 1742 a f ));
DATA(insert ( 701 20 483 a f ));
DATA(insert ( 701 21 237 a f ));
DATA(insert ( 701 23 317 a f ));
DATA(insert ( 701 700 312 a f ));
DATA(insert ( 701 1700 1743 a f ));
DATA(insert ( 1700 20 1779 a f ));
DATA(insert ( 1700 21 1783 a f ));
DATA(insert ( 1700 23 1744 a f ));
DATA(insert ( 1700 700 1745 i f ));
DATA(insert ( 1700 701 1746 i f ));
DATA(insert ( 790 1700 3823 a f ));
DATA(insert ( 1700 790 3824 a f ));
DATA(insert ( 23 790 3811 a f ));
DATA(insert ( 20 790 3812 a f ));
/* Allow explicit coercions between int4 and bool */
DATA(insert ( 23 16 2557 e f ));
DATA(insert ( 16 23 2558 e f ));
/*
* OID category: allow implicit conversion from any integral type (including
* int8, to support OID literals > 2G) to OID, as well as assignment coercion
* from OID to int4 or int8. Similarly for each OID-alias type. Also allow
* implicit coercions between OID and each OID-alias type, as well as
* regproc<->regprocedure and regoper<->regoperator. (Other coercions
* between alias types must pass through OID.) Lastly, there are implicit
* casts from text and varchar to regclass, which exist mainly to support
* legacy forms of nextval() and related functions.
*/
DATA(insert ( 20 26 1287 i f ));
DATA(insert ( 21 26 313 i f ));
DATA(insert ( 23 26 0 i b ));
DATA(insert ( 26 20 1288 a f ));
DATA(insert ( 26 23 0 a b ));
DATA(insert ( 26 24 0 i b ));
DATA(insert ( 24 26 0 i b ));
DATA(insert ( 20 24 1287 i f ));
DATA(insert ( 21 24 313 i f ));
DATA(insert ( 23 24 0 i b ));
DATA(insert ( 24 20 1288 a f ));
DATA(insert ( 24 23 0 a b ));
DATA(insert ( 24 2202 0 i b ));
DATA(insert ( 2202 24 0 i b ));
DATA(insert ( 26 2202 0 i b ));
DATA(insert ( 2202 26 0 i b ));
DATA(insert ( 20 2202 1287 i f ));
DATA(insert ( 21 2202 313 i f ));
DATA(insert ( 23 2202 0 i b ));
DATA(insert ( 2202 20 1288 a f ));
DATA(insert ( 2202 23 0 a b ));
DATA(insert ( 26 2203 0 i b ));
DATA(insert ( 2203 26 0 i b ));
DATA(insert ( 20 2203 1287 i f ));
DATA(insert ( 21 2203 313 i f ));
DATA(insert ( 23 2203 0 i b ));
DATA(insert ( 2203 20 1288 a f ));
DATA(insert ( 2203 23 0 a b ));
DATA(insert ( 2203 2204 0 i b ));
DATA(insert ( 2204 2203 0 i b ));
DATA(insert ( 26 2204 0 i b ));
DATA(insert ( 2204 26 0 i b ));
DATA(insert ( 20 2204 1287 i f ));
DATA(insert ( 21 2204 313 i f ));
DATA(insert ( 23 2204 0 i b ));
DATA(insert ( 2204 20 1288 a f ));
DATA(insert ( 2204 23 0 a b ));
DATA(insert ( 26 2205 0 i b ));
DATA(insert ( 2205 26 0 i b ));
DATA(insert ( 20 2205 1287 i f ));
DATA(insert ( 21 2205 313 i f ));
DATA(insert ( 23 2205 0 i b ));
DATA(insert ( 2205 20 1288 a f ));
DATA(insert ( 2205 23 0 a b ));
DATA(insert ( 26 2206 0 i b ));
DATA(insert ( 2206 26 0 i b ));
DATA(insert ( 20 2206 1287 i f ));
DATA(insert ( 21 2206 313 i f ));
DATA(insert ( 23 2206 0 i b ));
DATA(insert ( 2206 20 1288 a f ));
DATA(insert ( 2206 23 0 a b ));
DATA(insert ( 26 3734 0 i b ));
DATA(insert ( 3734 26 0 i b ));
DATA(insert ( 20 3734 1287 i f ));
DATA(insert ( 21 3734 313 i f ));
DATA(insert ( 23 3734 0 i b ));
DATA(insert ( 3734 20 1288 a f ));
DATA(insert ( 3734 23 0 a b ));
DATA(insert ( 26 3769 0 i b ));
DATA(insert ( 3769 26 0 i b ));
DATA(insert ( 20 3769 1287 i f ));
DATA(insert ( 21 3769 313 i f ));
DATA(insert ( 23 3769 0 i b ));
DATA(insert ( 3769 20 1288 a f ));
DATA(insert ( 3769 23 0 a b ));
DATA(insert ( 25 2205 1079 i f ));
DATA(insert ( 1043 2205 1079 i f ));
/*
* String category
*/
DATA(insert ( 25 1042 0 i b ));
DATA(insert ( 25 1043 0 i b ));
DATA(insert ( 1042 25 401 i f ));
DATA(insert ( 1042 1043 401 i f ));
DATA(insert ( 1043 25 0 i b ));
DATA(insert ( 1043 1042 0 i b ));
DATA(insert ( 18 25 946 i f ));
DATA(insert ( 18 1042 860 a f ));
DATA(insert ( 18 1043 946 a f ));
DATA(insert ( 19 25 406 i f ));
DATA(insert ( 19 1042 408 a f ));
DATA(insert ( 19 1043 1401 a f ));
DATA(insert ( 25 18 944 a f ));
DATA(insert ( 1042 18 944 a f ));
DATA(insert ( 1043 18 944 a f ));
DATA(insert ( 25 19 407 i f ));
DATA(insert ( 1042 19 409 i f ));
DATA(insert ( 1043 19 1400 i f ));
/* Allow explicit coercions between int4 and "char" */
DATA(insert ( 18 23 77 e f ));
DATA(insert ( 23 18 78 e f ));
/* pg_node_tree can be coerced to, but not from, text */
DATA(insert ( 194 25 0 i b ));
/*
* Datetime category
*/
DATA(insert ( 702 1082 1179 a f ));
DATA(insert ( 702 1083 1364 a f ));
DATA(insert ( 702 1114 2023 i f ));
DATA(insert ( 702 1184 1173 i f ));
DATA(insert ( 703 1186 1177 i f ));
DATA(insert ( 1082 1114 2024 i f ));
DATA(insert ( 1082 1184 1174 i f ));
DATA(insert ( 1083 1186 1370 i f ));
DATA(insert ( 1083 1266 2047 i f ));
DATA(insert ( 1114 702 2030 a f ));
DATA(insert ( 1114 1082 2029 a f ));
DATA(insert ( 1114 1083 1316 a f ));
DATA(insert ( 1114 1184 2028 i f ));
DATA(insert ( 1184 702 1180 a f ));
DATA(insert ( 1184 1082 1178 a f ));
DATA(insert ( 1184 1083 2019 a f ));
DATA(insert ( 1184 1114 2027 a f ));
DATA(insert ( 1184 1266 1388 a f ));
DATA(insert ( 1186 703 1194 a f ));
DATA(insert ( 1186 1083 1419 a f ));
DATA(insert ( 1266 1083 2046 a f ));
/* Cross-category casts between int4 and abstime, reltime */
DATA(insert ( 23 702 0 e b ));
DATA(insert ( 702 23 0 e b ));
DATA(insert ( 23 703 0 e b ));
DATA(insert ( 703 23 0 e b ));
/*
* Geometric category
*/
DATA(insert ( 601 600 1532 e f ));
DATA(insert ( 602 600 1533 e f ));
DATA(insert ( 602 604 1449 a f ));
DATA(insert ( 603 600 1534 e f ));
DATA(insert ( 603 601 1541 e f ));
DATA(insert ( 603 604 1448 a f ));
DATA(insert ( 603 718 1479 e f ));
DATA(insert ( 604 600 1540 e f ));
DATA(insert ( 604 602 1447 a f ));
DATA(insert ( 604 603 1446 e f ));
DATA(insert ( 604 718 1474 e f ));
DATA(insert ( 718 600 1416 e f ));
DATA(insert ( 718 603 1480 e f ));
DATA(insert ( 718 604 1544 e f ));
/*
* INET category
*/
DATA(insert ( 650 869 0 i b ));
DATA(insert ( 869 650 1715 a f ));
/*
* BitString category
*/
DATA(insert ( 1560 1562 0 i b ));
DATA(insert ( 1562 1560 0 i b ));
/* Cross-category casts between bit and int4, int8 */
DATA(insert ( 20 1560 2075 e f ));
DATA(insert ( 23 1560 1683 e f ));
DATA(insert ( 1560 20 2076 e f ));
DATA(insert ( 1560 23 1684 e f ));
/*
* Cross-category casts to and from TEXT
*
* We need entries here only for a few specialized cases where the behavior
* of the cast function differs from the datatype's I/O functions. Otherwise,
* parse_coerce.c will generate CoerceViaIO operations without any prompting.
*
* Note that the castcontext values specified here should be no stronger than
* parse_coerce.c's automatic casts ('a' to text, 'e' from text) else odd
* behavior will ensue when the automatic cast is applied instead of the
* pg_cast entry!
*/
DATA(insert ( 650 25 730 a f ));
DATA(insert ( 869 25 730 a f ));
DATA(insert ( 16 25 2971 a f ));
DATA(insert ( 142 25 0 a b ));
DATA(insert ( 25 142 2896 e f ));
/*
* Cross-category casts to and from VARCHAR
*
* We support all the same casts as for TEXT.
*/
DATA(insert ( 650 1043 730 a f ));
DATA(insert ( 869 1043 730 a f ));
DATA(insert ( 16 1043 2971 a f ));
DATA(insert ( 142 1043 0 a b ));
DATA(insert ( 1043 142 2896 e f ));
/*
* Cross-category casts to and from BPCHAR
*
* We support all the same casts as for TEXT.
*/
DATA(insert ( 650 1042 730 a f ));
DATA(insert ( 869 1042 730 a f ));
DATA(insert ( 16 1042 2971 a f ));
DATA(insert ( 142 1042 0 a b ));
DATA(insert ( 1042 142 2896 e f ));
/*
* Length-coercion functions
*/
DATA(insert ( 1042 1042 668 i f ));
DATA(insert ( 1043 1043 669 i f ));
DATA(insert ( 1083 1083 1968 i f ));
DATA(insert ( 1114 1114 1961 i f ));
DATA(insert ( 1184 1184 1967 i f ));
DATA(insert ( 1186 1186 1200 i f ));
DATA(insert ( 1266 1266 1969 i f ));
DATA(insert ( 1560 1560 1685 i f ));
DATA(insert ( 1562 1562 1687 i f ));
DATA(insert ( 1700 1700 1703 i f ));
#endif /* PG_CAST_H */
|