1996-10-31 08:10:14 +01:00
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/*-------------------------------------------------------------------------
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*
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1999-02-14 00:22:53 +01:00
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* postgres.h
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2001-02-10 03:31:31 +01:00
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* Primary include file for PostgreSQL server .c files
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*
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* This should be the first file included by PostgreSQL backend modules.
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* Client-side code should include postgres_fe.h instead.
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*
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1996-10-31 08:10:14 +01:00
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*
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2010-01-02 17:58:17 +01:00
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* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
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2000-01-26 06:58:53 +01:00
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* Portions Copyright (c) 1995, Regents of the University of California
|
1996-10-31 08:10:14 +01:00
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*
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2010-09-20 22:08:53 +02:00
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* src/include/postgres.h
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1996-10-31 08:10:14 +01:00
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*
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*-------------------------------------------------------------------------
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*/
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/*
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2001-02-10 03:31:31 +01:00
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*----------------------------------------------------------------
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* TABLE OF CONTENTS
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1996-10-31 08:10:14 +01:00
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*
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2001-02-10 03:31:31 +01:00
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* When adding stuff to this file, please try to put stuff
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* into the relevant section, or add new sections as appropriate.
|
1996-10-31 08:10:14 +01:00
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*
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2001-02-10 03:31:31 +01:00
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* section description
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* ------- ------------------------------------------------
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* 1) variable-length datatypes (TOAST support)
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* 2) datum type + support macros
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* 3) exception handling definitions
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1996-10-31 08:10:14 +01:00
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*
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2001-02-10 03:31:31 +01:00
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* NOTES
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*
|
2002-08-25 19:20:01 +02:00
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* In general, this file should contain declarations that are widely needed
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* in the backend environment, but are of no interest outside the backend.
|
2001-02-10 03:31:31 +01:00
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*
|
2002-08-25 19:20:01 +02:00
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* Simple type definitions live in c.h, where they are shared with
|
2002-09-04 22:31:48 +02:00
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* postgres_fe.h. We do that since those type definitions are needed by
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2002-08-25 19:20:01 +02:00
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* frontend modules that want to deal with binary data transmission to or
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* from the backend. Type definitions in this file should be for
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* representations that never escape the backend, such as Datum or
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* TOASTed varlena objects.
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2001-02-10 03:31:31 +01:00
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*
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*----------------------------------------------------------------
|
1996-10-31 08:10:14 +01:00
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*/
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#ifndef POSTGRES_H
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#define POSTGRES_H
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#include "c.h"
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1999-07-15 17:21:54 +02:00
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#include "utils/elog.h"
|
1999-07-16 19:07:40 +02:00
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#include "utils/palloc.h"
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1996-10-31 08:10:14 +01:00
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/* ----------------------------------------------------------------
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2001-02-10 03:31:31 +01:00
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* Section 1: variable-length datatypes (TOAST support)
|
1996-10-31 08:10:14 +01:00
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* ----------------------------------------------------------------
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*/
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2007-04-06 06:21:44 +02:00
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/*
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* struct varatt_external is a "TOAST pointer", that is, the information
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2007-11-15 22:14:46 +01:00
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|
* needed to fetch a stored-out-of-line Datum. The data is compressed
|
2007-04-06 06:21:44 +02:00
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* if and only if va_extsize < va_rawsize - VARHDRSZ. This struct must not
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* contain any padding, because we sometimes compare pointers using memcmp.
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*
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* Note that this information is stored unaligned within actual tuples, so
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* you need to memcpy from the tuple into a local struct variable before
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* you can look at these fields! (The reason we use memcmp is to avoid
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* having to do that just to detect equality of two TOAST pointers...)
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*/
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struct varatt_external
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{
|
2007-11-15 22:14:46 +01:00
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int32 va_rawsize; /* Original data size (includes header) */
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int32 va_extsize; /* External saved size (doesn't) */
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Oid va_valueid; /* Unique ID of value within TOAST table */
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Oid va_toastrelid; /* RelID of TOAST table containing it */
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2007-04-06 06:21:44 +02:00
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};
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/*
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* These structs describe the header of a varlena object that may have been
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* TOASTed. Generally, don't reference these structs directly, but use the
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* macros below.
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*
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* We use separate structs for the aligned and unaligned cases because the
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* compiler might otherwise think it could generate code that assumes
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* alignment while touching fields of a 1-byte-header varlena.
|
1996-10-31 08:10:14 +01:00
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*/
|
2007-04-06 06:21:44 +02:00
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typedef union
|
1999-12-21 01:06:44 +01:00
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{
|
2007-11-15 22:14:46 +01:00
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struct /* Normal varlena (4-byte length) */
|
2007-04-06 06:21:44 +02:00
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{
|
2007-11-15 22:14:46 +01:00
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uint32 va_header;
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char va_data[1];
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} va_4byte;
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struct /* Compressed-in-line format */
|
1999-12-21 01:06:44 +01:00
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{
|
2007-11-15 22:14:46 +01:00
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uint32 va_header;
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uint32 va_rawsize; /* Original data size (excludes header) */
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char va_data[1]; /* Compressed data */
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} va_compressed;
|
2007-11-15 23:25:18 +01:00
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} varattrib_4b;
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2007-04-06 06:21:44 +02:00
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typedef struct
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{
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uint8 va_header;
|
2007-11-15 22:14:46 +01:00
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char va_data[1]; /* Data begins here */
|
2007-11-15 23:25:18 +01:00
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} varattrib_1b;
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2007-04-06 06:21:44 +02:00
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typedef struct
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{
|
2007-11-15 22:14:46 +01:00
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uint8 va_header; /* Always 0x80 or 0x01 */
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uint8 va_len_1be; /* Physical length of datum */
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char va_data[1]; /* Data (for now always a TOAST pointer) */
|
2007-11-15 23:25:18 +01:00
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|
|
} varattrib_1b_e;
|
2007-09-30 21:54:58 +02:00
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|
2007-04-06 06:21:44 +02:00
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|
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/*
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|
|
|
* Bit layouts for varlena headers on big-endian machines:
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*
|
2007-11-15 22:14:46 +01:00
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|
|
* 00xxxxxx 4-byte length word, aligned, uncompressed data (up to 1G)
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|
* 01xxxxxx 4-byte length word, aligned, *compressed* data (up to 1G)
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* 10000000 1-byte length word, unaligned, TOAST pointer
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|
* 1xxxxxxx 1-byte length word, unaligned, uncompressed data (up to 126b)
|
2007-04-06 06:21:44 +02:00
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|
|
*
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|
* Bit layouts for varlena headers on little-endian machines:
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|
*
|
2007-11-15 22:14:46 +01:00
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|
|
* xxxxxx00 4-byte length word, aligned, uncompressed data (up to 1G)
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|
* xxxxxx10 4-byte length word, aligned, *compressed* data (up to 1G)
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|
|
* 00000001 1-byte length word, unaligned, TOAST pointer
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|
* xxxxxxx1 1-byte length word, unaligned, uncompressed data (up to 126b)
|
2007-04-06 06:21:44 +02:00
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|
|
*
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|
|
* The "xxx" bits are the length field (which includes itself in all cases).
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|
* In the big-endian case we mask to extract the length, in the little-endian
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|
|
* case we shift. Note that in both cases the flag bits are in the physically
|
2007-11-15 22:14:46 +01:00
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|
* first byte. Also, it is not possible for a 1-byte length word to be zero;
|
2007-04-06 06:21:44 +02:00
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|
|
* this lets us disambiguate alignment padding bytes from the start of an
|
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|
* unaligned datum. (We now *require* pad bytes to be filled with zero!)
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|
|
*/
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|
|
|
|
|
/*
|
|
|
|
* Endian-dependent macros. These are considered internal --- use the
|
|
|
|
* external macros below instead of using these directly.
|
|
|
|
*
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|
|
|
* Note: IS_1B is true for external toast records but VARSIZE_1B will return 0
|
|
|
|
* for such records. Hence you should usually check for IS_EXTERNAL before
|
|
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|
* checking for IS_1B.
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|
*/
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|
#ifdef WORDS_BIGENDIAN
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|
#define VARATT_IS_4B(PTR) \
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((((varattrib_1b *) (PTR))->va_header & 0x80) == 0x00)
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|
#define VARATT_IS_4B_U(PTR) \
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|
((((varattrib_1b *) (PTR))->va_header & 0xC0) == 0x00)
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|
#define VARATT_IS_4B_C(PTR) \
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((((varattrib_1b *) (PTR))->va_header & 0xC0) == 0x40)
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|
#define VARATT_IS_1B(PTR) \
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((((varattrib_1b *) (PTR))->va_header & 0x80) == 0x80)
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#define VARATT_IS_1B_E(PTR) \
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((((varattrib_1b *) (PTR))->va_header) == 0x80)
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|
#define VARATT_NOT_PAD_BYTE(PTR) \
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|
(*((uint8 *) (PTR)) != 0)
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|
|
/* VARSIZE_4B() should only be used on known-aligned data */
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|
#define VARSIZE_4B(PTR) \
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|
(((varattrib_4b *) (PTR))->va_4byte.va_header & 0x3FFFFFFF)
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|
|
#define VARSIZE_1B(PTR) \
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|
|
(((varattrib_1b *) (PTR))->va_header & 0x7F)
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|
|
#define VARSIZE_1B_E(PTR) \
|
2007-09-30 21:54:58 +02:00
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|
|
(((varattrib_1b_e *) (PTR))->va_len_1be)
|
2007-04-06 06:21:44 +02:00
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|
|
#define SET_VARSIZE_4B(PTR,len) \
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|
|
(((varattrib_4b *) (PTR))->va_4byte.va_header = (len) & 0x3FFFFFFF)
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|
|
|
#define SET_VARSIZE_4B_C(PTR,len) \
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|
|
(((varattrib_4b *) (PTR))->va_4byte.va_header = ((len) & 0x3FFFFFFF) | 0x40000000)
|
|
|
|
#define SET_VARSIZE_1B(PTR,len) \
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|
|
|
(((varattrib_1b *) (PTR))->va_header = (len) | 0x80)
|
2007-09-30 21:54:58 +02:00
|
|
|
#define SET_VARSIZE_1B_E(PTR,len) \
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|
|
|
(((varattrib_1b_e *) (PTR))->va_header = 0x80, \
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|
|
|
((varattrib_1b_e *) (PTR))->va_len_1be = (len))
|
2007-11-15 22:14:46 +01:00
|
|
|
#else /* !WORDS_BIGENDIAN */
|
2007-04-06 06:21:44 +02:00
|
|
|
|
|
|
|
#define VARATT_IS_4B(PTR) \
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|
|
|
((((varattrib_1b *) (PTR))->va_header & 0x01) == 0x00)
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|
|
|
#define VARATT_IS_4B_U(PTR) \
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|
|
|
((((varattrib_1b *) (PTR))->va_header & 0x03) == 0x00)
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|
|
#define VARATT_IS_4B_C(PTR) \
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|
|
|
((((varattrib_1b *) (PTR))->va_header & 0x03) == 0x02)
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|
|
#define VARATT_IS_1B(PTR) \
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|
|
|
((((varattrib_1b *) (PTR))->va_header & 0x01) == 0x01)
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|
|
#define VARATT_IS_1B_E(PTR) \
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|
|
|
((((varattrib_1b *) (PTR))->va_header) == 0x01)
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|
|
#define VARATT_NOT_PAD_BYTE(PTR) \
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|
|
|
(*((uint8 *) (PTR)) != 0)
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|
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|
|
|
|
|
/* VARSIZE_4B() should only be used on known-aligned data */
|
|
|
|
#define VARSIZE_4B(PTR) \
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|
|
|
((((varattrib_4b *) (PTR))->va_4byte.va_header >> 2) & 0x3FFFFFFF)
|
|
|
|
#define VARSIZE_1B(PTR) \
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|
|
((((varattrib_1b *) (PTR))->va_header >> 1) & 0x7F)
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|
|
#define VARSIZE_1B_E(PTR) \
|
2007-09-30 21:54:58 +02:00
|
|
|
(((varattrib_1b_e *) (PTR))->va_len_1be)
|
2007-04-06 06:21:44 +02:00
|
|
|
|
|
|
|
#define SET_VARSIZE_4B(PTR,len) \
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|
|
|
(((varattrib_4b *) (PTR))->va_4byte.va_header = (((uint32) (len)) << 2))
|
|
|
|
#define SET_VARSIZE_4B_C(PTR,len) \
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|
|
(((varattrib_4b *) (PTR))->va_4byte.va_header = (((uint32) (len)) << 2) | 0x02)
|
|
|
|
#define SET_VARSIZE_1B(PTR,len) \
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|
|
|
(((varattrib_1b *) (PTR))->va_header = (((uint8) (len)) << 1) | 0x01)
|
2007-09-30 21:54:58 +02:00
|
|
|
#define SET_VARSIZE_1B_E(PTR,len) \
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|
|
|
(((varattrib_1b_e *) (PTR))->va_header = 0x01, \
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|
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|
((varattrib_1b_e *) (PTR))->va_len_1be = (len))
|
2007-11-15 22:14:46 +01:00
|
|
|
#endif /* WORDS_BIGENDIAN */
|
2007-04-06 06:21:44 +02:00
|
|
|
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|
|
|
#define VARHDRSZ_SHORT 1
|
|
|
|
#define VARATT_SHORT_MAX 0x7F
|
|
|
|
#define VARATT_CAN_MAKE_SHORT(PTR) \
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|
|
|
(VARATT_IS_4B_U(PTR) && \
|
|
|
|
(VARSIZE(PTR) - VARHDRSZ + VARHDRSZ_SHORT) <= VARATT_SHORT_MAX)
|
|
|
|
#define VARATT_CONVERTED_SHORT_SIZE(PTR) \
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|
|
|
(VARSIZE(PTR) - VARHDRSZ + VARHDRSZ_SHORT)
|
|
|
|
|
2007-10-01 18:25:56 +02:00
|
|
|
#define VARHDRSZ_EXTERNAL 2
|
|
|
|
|
2007-04-06 06:21:44 +02:00
|
|
|
#define VARDATA_4B(PTR) (((varattrib_4b *) (PTR))->va_4byte.va_data)
|
|
|
|
#define VARDATA_4B_C(PTR) (((varattrib_4b *) (PTR))->va_compressed.va_data)
|
|
|
|
#define VARDATA_1B(PTR) (((varattrib_1b *) (PTR))->va_data)
|
2007-09-30 21:54:58 +02:00
|
|
|
#define VARDATA_1B_E(PTR) (((varattrib_1b_e *) (PTR))->va_data)
|
2007-04-06 06:21:44 +02:00
|
|
|
|
|
|
|
#define VARRAWSIZE_4B_C(PTR) \
|
|
|
|
(((varattrib_4b *) (PTR))->va_compressed.va_rawsize)
|
|
|
|
|
|
|
|
/* Externally visible macros */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* VARDATA, VARSIZE, and SET_VARSIZE are the recommended API for most code
|
|
|
|
* for varlena datatypes. Note that they only work on untoasted,
|
|
|
|
* 4-byte-header Datums!
|
|
|
|
*
|
|
|
|
* Code that wants to use 1-byte-header values without detoasting should
|
|
|
|
* use VARSIZE_ANY/VARSIZE_ANY_EXHDR/VARDATA_ANY. The other macros here
|
|
|
|
* should usually be used only by tuple assembly/disassembly code and
|
|
|
|
* code that specifically wants to work with still-toasted Datums.
|
2007-05-15 19:39:54 +02:00
|
|
|
*
|
|
|
|
* WARNING: It is only safe to use VARDATA_ANY() -- typically with
|
2007-09-27 23:01:59 +02:00
|
|
|
* PG_DETOAST_DATUM_PACKED() -- if you really don't care about the alignment.
|
2007-05-15 19:39:54 +02:00
|
|
|
* Either because you're working with something like text where the alignment
|
|
|
|
* doesn't matter or because you're not going to access its constituent parts
|
|
|
|
* and just use things like memcpy on it anyways.
|
2007-04-06 06:21:44 +02:00
|
|
|
*/
|
|
|
|
#define VARDATA(PTR) VARDATA_4B(PTR)
|
|
|
|
#define VARSIZE(PTR) VARSIZE_4B(PTR)
|
|
|
|
|
|
|
|
#define VARSIZE_SHORT(PTR) VARSIZE_1B(PTR)
|
|
|
|
#define VARDATA_SHORT(PTR) VARDATA_1B(PTR)
|
|
|
|
|
|
|
|
#define VARSIZE_EXTERNAL(PTR) VARSIZE_1B_E(PTR)
|
2007-09-30 21:54:58 +02:00
|
|
|
#define VARDATA_EXTERNAL(PTR) VARDATA_1B_E(PTR)
|
2007-04-06 06:21:44 +02:00
|
|
|
|
|
|
|
#define VARATT_IS_COMPRESSED(PTR) VARATT_IS_4B_C(PTR)
|
|
|
|
#define VARATT_IS_EXTERNAL(PTR) VARATT_IS_1B_E(PTR)
|
|
|
|
#define VARATT_IS_SHORT(PTR) VARATT_IS_1B(PTR)
|
|
|
|
#define VARATT_IS_EXTENDED(PTR) (!VARATT_IS_4B_U(PTR))
|
|
|
|
|
|
|
|
#define SET_VARSIZE(PTR, len) SET_VARSIZE_4B(PTR, len)
|
|
|
|
#define SET_VARSIZE_SHORT(PTR, len) SET_VARSIZE_1B(PTR, len)
|
|
|
|
#define SET_VARSIZE_COMPRESSED(PTR, len) SET_VARSIZE_4B_C(PTR, len)
|
2007-09-30 21:54:58 +02:00
|
|
|
#define SET_VARSIZE_EXTERNAL(PTR, len) SET_VARSIZE_1B_E(PTR, len)
|
2007-04-06 06:21:44 +02:00
|
|
|
|
|
|
|
#define VARSIZE_ANY(PTR) \
|
|
|
|
(VARATT_IS_1B_E(PTR) ? VARSIZE_1B_E(PTR) : \
|
|
|
|
(VARATT_IS_1B(PTR) ? VARSIZE_1B(PTR) : \
|
|
|
|
VARSIZE_4B(PTR)))
|
|
|
|
|
|
|
|
#define VARSIZE_ANY_EXHDR(PTR) \
|
2007-10-01 18:25:56 +02:00
|
|
|
(VARATT_IS_1B_E(PTR) ? VARSIZE_1B_E(PTR)-VARHDRSZ_EXTERNAL : \
|
|
|
|
(VARATT_IS_1B(PTR) ? VARSIZE_1B(PTR)-VARHDRSZ_SHORT : \
|
|
|
|
VARSIZE_4B(PTR)-VARHDRSZ))
|
2007-04-06 06:21:44 +02:00
|
|
|
|
|
|
|
/* caution: this will not work on an external or compressed-in-line Datum */
|
2007-05-15 19:39:54 +02:00
|
|
|
/* caution: this will return a possibly unaligned pointer */
|
2007-04-06 06:21:44 +02:00
|
|
|
#define VARDATA_ANY(PTR) \
|
|
|
|
(VARATT_IS_1B(PTR) ? VARDATA_1B(PTR) : VARDATA_4B(PTR))
|
1999-12-21 01:06:44 +01:00
|
|
|
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
|
|
* Section 2: datum type + support macros
|
|
|
|
* ----------------------------------------------------------------
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Port Notes:
|
2009-12-31 20:41:37 +01:00
|
|
|
* Postgres makes the following assumptions about datatype sizes:
|
2001-02-10 03:31:31 +01:00
|
|
|
*
|
2009-12-31 20:41:37 +01:00
|
|
|
* sizeof(Datum) == sizeof(void *) == 4 or 8
|
2001-02-10 03:31:31 +01:00
|
|
|
* sizeof(char) == 1
|
|
|
|
* sizeof(short) == 2
|
|
|
|
*
|
2007-03-23 21:24:41 +01:00
|
|
|
* When a type narrower than Datum is stored in a Datum, we place it in the
|
|
|
|
* low-order bits and are careful that the DatumGetXXX macro for it discards
|
|
|
|
* the unused high-order bits (as opposed to, say, assuming they are zero).
|
|
|
|
* This is needed to support old-style user-defined functions, since depending
|
|
|
|
* on architecture and compiler, the return value of a function returning char
|
|
|
|
* or short may contain garbage when called as if it returned Datum.
|
2001-02-10 03:31:31 +01:00
|
|
|
*/
|
|
|
|
|
2009-12-31 20:41:37 +01:00
|
|
|
typedef uintptr_t Datum;
|
2003-08-04 02:43:34 +02:00
|
|
|
|
2009-12-31 20:41:37 +01:00
|
|
|
#define SIZEOF_DATUM SIZEOF_VOID_P
|
2007-03-23 21:24:41 +01:00
|
|
|
|
2001-02-10 03:31:31 +01:00
|
|
|
typedef Datum *DatumPtr;
|
|
|
|
|
|
|
|
#define GET_1_BYTE(datum) (((Datum) (datum)) & 0x000000ff)
|
|
|
|
#define GET_2_BYTES(datum) (((Datum) (datum)) & 0x0000ffff)
|
|
|
|
#define GET_4_BYTES(datum) (((Datum) (datum)) & 0xffffffff)
|
2008-04-21 02:26:47 +02:00
|
|
|
#if SIZEOF_DATUM == 8
|
|
|
|
#define GET_8_BYTES(datum) ((Datum) (datum))
|
|
|
|
#endif
|
2001-02-10 03:31:31 +01:00
|
|
|
#define SET_1_BYTE(value) (((Datum) (value)) & 0x000000ff)
|
|
|
|
#define SET_2_BYTES(value) (((Datum) (value)) & 0x0000ffff)
|
|
|
|
#define SET_4_BYTES(value) (((Datum) (value)) & 0xffffffff)
|
2008-04-21 02:26:47 +02:00
|
|
|
#if SIZEOF_DATUM == 8
|
|
|
|
#define SET_8_BYTES(value) ((Datum) (value))
|
|
|
|
#endif
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetBool
|
|
|
|
* Returns boolean value of a datum.
|
|
|
|
*
|
2007-03-23 21:24:41 +01:00
|
|
|
* Note: any nonzero value will be considered TRUE, but we ignore bits to
|
|
|
|
* the left of the width of bool, per comment above.
|
1999-12-21 01:06:44 +01:00
|
|
|
*/
|
|
|
|
|
2007-03-23 21:24:41 +01:00
|
|
|
#define DatumGetBool(X) ((bool) (((bool) (X)) != 0))
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
/*
|
|
|
|
* BoolGetDatum
|
|
|
|
* Returns datum representation for a boolean.
|
|
|
|
*
|
|
|
|
* Note: any nonzero value will be considered TRUE.
|
|
|
|
*/
|
1999-12-21 01:06:44 +01:00
|
|
|
|
2001-02-10 03:31:31 +01:00
|
|
|
#define BoolGetDatum(X) ((Datum) ((X) ? 1 : 0))
|
1999-12-21 01:06:44 +01:00
|
|
|
|
2001-02-10 03:31:31 +01:00
|
|
|
/*
|
|
|
|
* DatumGetChar
|
|
|
|
* Returns character value of a datum.
|
|
|
|
*/
|
2000-06-13 09:35:40 +02:00
|
|
|
|
2001-02-10 03:31:31 +01:00
|
|
|
#define DatumGetChar(X) ((char) GET_1_BYTE(X))
|
2000-06-13 09:35:40 +02:00
|
|
|
|
2001-02-10 03:31:31 +01:00
|
|
|
/*
|
|
|
|
* CharGetDatum
|
|
|
|
* Returns datum representation for a character.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define CharGetDatum(X) ((Datum) SET_1_BYTE(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Int8GetDatum
|
|
|
|
* Returns datum representation for an 8-bit integer.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define Int8GetDatum(X) ((Datum) SET_1_BYTE(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetUInt8
|
|
|
|
* Returns 8-bit unsigned integer value of a datum.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetUInt8(X) ((uint8) GET_1_BYTE(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* UInt8GetDatum
|
|
|
|
* Returns datum representation for an 8-bit unsigned integer.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define UInt8GetDatum(X) ((Datum) SET_1_BYTE(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetInt16
|
|
|
|
* Returns 16-bit integer value of a datum.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetInt16(X) ((int16) GET_2_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Int16GetDatum
|
|
|
|
* Returns datum representation for a 16-bit integer.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define Int16GetDatum(X) ((Datum) SET_2_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetUInt16
|
|
|
|
* Returns 16-bit unsigned integer value of a datum.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetUInt16(X) ((uint16) GET_2_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* UInt16GetDatum
|
|
|
|
* Returns datum representation for a 16-bit unsigned integer.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define UInt16GetDatum(X) ((Datum) SET_2_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetInt32
|
|
|
|
* Returns 32-bit integer value of a datum.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetInt32(X) ((int32) GET_4_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Int32GetDatum
|
|
|
|
* Returns datum representation for a 32-bit integer.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define Int32GetDatum(X) ((Datum) SET_4_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetUInt32
|
|
|
|
* Returns 32-bit unsigned integer value of a datum.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetUInt32(X) ((uint32) GET_4_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* UInt32GetDatum
|
|
|
|
* Returns datum representation for a 32-bit unsigned integer.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define UInt32GetDatum(X) ((Datum) SET_4_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetObjectId
|
|
|
|
* Returns object identifier value of a datum.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetObjectId(X) ((Oid) GET_4_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ObjectIdGetDatum
|
|
|
|
* Returns datum representation for an object identifier.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define ObjectIdGetDatum(X) ((Datum) SET_4_BYTES(X))
|
|
|
|
|
2001-08-24 01:06:38 +02:00
|
|
|
/*
|
|
|
|
* DatumGetTransactionId
|
|
|
|
* Returns transaction identifier value of a datum.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetTransactionId(X) ((TransactionId) GET_4_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* TransactionIdGetDatum
|
|
|
|
* Returns datum representation for a transaction identifier.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define TransactionIdGetDatum(X) ((Datum) SET_4_BYTES((X)))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetCommandId
|
|
|
|
* Returns command identifier value of a datum.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetCommandId(X) ((CommandId) GET_4_BYTES(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* CommandIdGetDatum
|
|
|
|
* Returns datum representation for a command identifier.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define CommandIdGetDatum(X) ((Datum) SET_4_BYTES(X))
|
|
|
|
|
2001-02-10 03:31:31 +01:00
|
|
|
/*
|
|
|
|
* DatumGetPointer
|
|
|
|
* Returns pointer value of a datum.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetPointer(X) ((Pointer) (X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* PointerGetDatum
|
|
|
|
* Returns datum representation for a pointer.
|
1999-03-25 04:49:34 +01:00
|
|
|
*/
|
1996-10-31 08:10:14 +01:00
|
|
|
|
2001-02-10 03:31:31 +01:00
|
|
|
#define PointerGetDatum(X) ((Datum) (X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetCString
|
|
|
|
* Returns C string (null-terminated string) value of a datum.
|
|
|
|
*
|
|
|
|
* Note: C string is not a full-fledged Postgres type at present,
|
|
|
|
* but type input functions use this conversion for their inputs.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetCString(X) ((char *) DatumGetPointer(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* CStringGetDatum
|
|
|
|
* Returns datum representation for a C string (null-terminated string).
|
|
|
|
*
|
|
|
|
* Note: C string is not a full-fledged Postgres type at present,
|
|
|
|
* but type output functions use this conversion for their outputs.
|
|
|
|
* Note: CString is pass-by-reference; caller must ensure the pointed-to
|
|
|
|
* value has adequate lifetime.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define CStringGetDatum(X) PointerGetDatum(X)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetName
|
|
|
|
* Returns name value of a datum.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define DatumGetName(X) ((Name) DatumGetPointer(X))
|
|
|
|
|
|
|
|
/*
|
|
|
|
* NameGetDatum
|
|
|
|
* Returns datum representation for a name.
|
|
|
|
*
|
|
|
|
* Note: Name is pass-by-reference; caller must ensure the pointed-to
|
|
|
|
* value has adequate lifetime.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define NameGetDatum(X) PointerGetDatum(X)
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetInt64
|
|
|
|
* Returns 64-bit integer value of a datum.
|
|
|
|
*
|
2008-04-21 02:26:47 +02:00
|
|
|
* Note: this macro hides whether int64 is pass by value or by reference.
|
2001-02-10 03:31:31 +01:00
|
|
|
*/
|
|
|
|
|
2008-04-21 02:26:47 +02:00
|
|
|
#ifdef USE_FLOAT8_BYVAL
|
|
|
|
#define DatumGetInt64(X) ((int64) GET_8_BYTES(X))
|
|
|
|
#else
|
2001-02-10 03:31:31 +01:00
|
|
|
#define DatumGetInt64(X) (* ((int64 *) DatumGetPointer(X)))
|
2008-04-21 02:26:47 +02:00
|
|
|
#endif
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Int64GetDatum
|
|
|
|
* Returns datum representation for a 64-bit integer.
|
|
|
|
*
|
2008-04-21 02:26:47 +02:00
|
|
|
* Note: if int64 is pass by reference, this function returns a reference
|
|
|
|
* to palloc'd space.
|
2001-02-10 03:31:31 +01:00
|
|
|
*/
|
|
|
|
|
2008-04-21 02:26:47 +02:00
|
|
|
#ifdef USE_FLOAT8_BYVAL
|
|
|
|
#define Int64GetDatum(X) ((Datum) SET_8_BYTES(X))
|
|
|
|
#else
|
2001-02-10 03:31:31 +01:00
|
|
|
extern Datum Int64GetDatum(int64 X);
|
2008-04-21 02:26:47 +02:00
|
|
|
#endif
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetFloat4
|
|
|
|
* Returns 4-byte floating point value of a datum.
|
2008-04-21 02:26:47 +02:00
|
|
|
*
|
|
|
|
* Note: this macro hides whether float4 is pass by value or by reference.
|
2001-02-10 03:31:31 +01:00
|
|
|
*/
|
|
|
|
|
2008-04-21 02:26:47 +02:00
|
|
|
#ifdef USE_FLOAT4_BYVAL
|
2008-04-18 20:43:09 +02:00
|
|
|
extern float4 DatumGetFloat4(Datum X);
|
2008-04-21 02:26:47 +02:00
|
|
|
#else
|
|
|
|
#define DatumGetFloat4(X) (* ((float4 *) DatumGetPointer(X)))
|
|
|
|
#endif
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Float4GetDatum
|
|
|
|
* Returns datum representation for a 4-byte floating point number.
|
2008-04-21 02:26:47 +02:00
|
|
|
*
|
|
|
|
* Note: if float4 is pass by reference, this function returns a reference
|
|
|
|
* to palloc'd space.
|
2001-02-10 03:31:31 +01:00
|
|
|
*/
|
|
|
|
|
|
|
|
extern Datum Float4GetDatum(float4 X);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DatumGetFloat8
|
|
|
|
* Returns 8-byte floating point value of a datum.
|
|
|
|
*
|
2008-04-21 02:26:47 +02:00
|
|
|
* Note: this macro hides whether float8 is pass by value or by reference.
|
2001-02-10 03:31:31 +01:00
|
|
|
*/
|
|
|
|
|
2008-04-21 02:26:47 +02:00
|
|
|
#ifdef USE_FLOAT8_BYVAL
|
|
|
|
extern float8 DatumGetFloat8(Datum X);
|
|
|
|
#else
|
2001-02-10 03:31:31 +01:00
|
|
|
#define DatumGetFloat8(X) (* ((float8 *) DatumGetPointer(X)))
|
2008-04-21 02:26:47 +02:00
|
|
|
#endif
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Float8GetDatum
|
|
|
|
* Returns datum representation for an 8-byte floating point number.
|
|
|
|
*
|
2008-04-21 02:26:47 +02:00
|
|
|
* Note: if float8 is pass by reference, this function returns a reference
|
|
|
|
* to palloc'd space.
|
2001-02-10 03:31:31 +01:00
|
|
|
*/
|
|
|
|
|
|
|
|
extern Datum Float8GetDatum(float8 X);
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Int64GetDatumFast
|
|
|
|
* Float8GetDatumFast
|
2008-04-21 02:26:47 +02:00
|
|
|
* Float4GetDatumFast
|
2001-02-10 03:31:31 +01:00
|
|
|
*
|
|
|
|
* These macros are intended to allow writing code that does not depend on
|
2008-04-21 02:26:47 +02:00
|
|
|
* whether int64, float8, float4 are pass-by-reference types, while not
|
2001-02-10 03:31:31 +01:00
|
|
|
* sacrificing performance when they are. The argument must be a variable
|
|
|
|
* that will exist and have the same value for as long as the Datum is needed.
|
|
|
|
* In the pass-by-ref case, the address of the variable is taken to use as
|
|
|
|
* the Datum. In the pass-by-val case, these will be the same as the non-Fast
|
|
|
|
* macros.
|
|
|
|
*/
|
|
|
|
|
2008-04-21 02:26:47 +02:00
|
|
|
#ifdef USE_FLOAT8_BYVAL
|
|
|
|
#define Int64GetDatumFast(X) Int64GetDatum(X)
|
|
|
|
#define Float8GetDatumFast(X) Float8GetDatum(X)
|
|
|
|
#else
|
2001-02-10 03:31:31 +01:00
|
|
|
#define Int64GetDatumFast(X) PointerGetDatum(&(X))
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|
|
|
#define Float8GetDatumFast(X) PointerGetDatum(&(X))
|
2008-04-21 02:26:47 +02:00
|
|
|
#endif
|
|
|
|
|
|
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|
#ifdef USE_FLOAT4_BYVAL
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|
|
|
#define Float4GetDatumFast(X) Float4GetDatum(X)
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|
#else
|
|
|
|
#define Float4GetDatumFast(X) PointerGetDatum(&(X))
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|
|
|
#endif
|
2001-02-10 03:31:31 +01:00
|
|
|
|
1999-11-08 00:08:36 +01:00
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|
|
1996-10-31 08:10:14 +01:00
|
|
|
/* ----------------------------------------------------------------
|
2001-02-10 03:31:31 +01:00
|
|
|
* Section 3: exception handling definitions
|
|
|
|
* Assert, Trap, etc macros
|
1996-10-31 08:10:14 +01:00
|
|
|
* ----------------------------------------------------------------
|
|
|
|
*/
|
|
|
|
|
2007-07-25 14:22:54 +02:00
|
|
|
extern PGDLLIMPORT bool assert_enabled;
|
2000-06-13 09:35:40 +02:00
|
|
|
|
2001-02-10 03:31:31 +01:00
|
|
|
/*
|
|
|
|
* USE_ASSERT_CHECKING, if defined, turns on all the assertions.
|
|
|
|
* - plai 9/5/90
|
|
|
|
*
|
|
|
|
* It should _NOT_ be defined in releases or in benchmark copies
|
|
|
|
*/
|
1997-09-07 07:04:48 +02:00
|
|
|
|
2001-02-10 03:31:31 +01:00
|
|
|
/*
|
|
|
|
* Trap
|
|
|
|
* Generates an exception if the given condition is true.
|
|
|
|
*/
|
2002-08-10 22:29:18 +02:00
|
|
|
#define Trap(condition, errorType) \
|
2006-07-13 18:49:20 +02:00
|
|
|
do { \
|
|
|
|
if ((assert_enabled) && (condition)) \
|
|
|
|
ExceptionalCondition(CppAsString(condition), (errorType), \
|
|
|
|
__FILE__, __LINE__); \
|
|
|
|
} while (0)
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
/*
|
|
|
|
* TrapMacro is the same as Trap but it's intended for use in macros:
|
|
|
|
*
|
2002-08-10 22:29:18 +02:00
|
|
|
* #define foo(x) (AssertMacro(x != 0) && bar(x))
|
2001-02-10 03:31:31 +01:00
|
|
|
*
|
|
|
|
* Isn't CPP fun?
|
|
|
|
*/
|
2002-08-10 22:29:18 +02:00
|
|
|
#define TrapMacro(condition, errorType) \
|
2001-02-10 03:31:31 +01:00
|
|
|
((bool) ((! assert_enabled) || ! (condition) || \
|
2002-08-10 22:29:18 +02:00
|
|
|
(ExceptionalCondition(CppAsString(condition), (errorType), \
|
|
|
|
__FILE__, __LINE__))))
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
#ifndef USE_ASSERT_CHECKING
|
|
|
|
#define Assert(condition)
|
|
|
|
#define AssertMacro(condition) ((void)true)
|
|
|
|
#define AssertArg(condition)
|
|
|
|
#define AssertState(condition)
|
|
|
|
#else
|
|
|
|
#define Assert(condition) \
|
2002-08-10 22:29:18 +02:00
|
|
|
Trap(!(condition), "FailedAssertion")
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
#define AssertMacro(condition) \
|
2002-08-10 22:29:18 +02:00
|
|
|
((void) TrapMacro(!(condition), "FailedAssertion"))
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
#define AssertArg(condition) \
|
2002-08-10 22:29:18 +02:00
|
|
|
Trap(!(condition), "BadArgument")
|
2001-02-10 03:31:31 +01:00
|
|
|
|
|
|
|
#define AssertState(condition) \
|
2002-08-10 22:29:18 +02:00
|
|
|
Trap(!(condition), "BadState")
|
2001-11-05 18:46:40 +01:00
|
|
|
#endif /* USE_ASSERT_CHECKING */
|
2001-02-10 03:31:31 +01:00
|
|
|
|
2007-05-04 04:01:02 +02:00
|
|
|
extern int ExceptionalCondition(const char *conditionName,
|
2007-11-15 22:14:46 +01:00
|
|
|
const char *errorType,
|
|
|
|
const char *fileName, int lineNumber);
|
2001-10-03 23:58:28 +02:00
|
|
|
|
2001-11-05 18:46:40 +01:00
|
|
|
#endif /* POSTGRES_H */
|