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Move hash_any prototype from access/hash.h to utils/hashutils.h 

... as well as its implementation from backend/access/hash/hashfunc.c to
backend/utils/hash/hashfn.c.

access/hash is the place for the hash index AM, not really appropriate
for generic facilities, which is what hash_any is; having things the old
way meant that anything using hash_any had to include the AM's include
file, pointlessly polluting its namespace with unrelated, unnecessary
cruft.

Also move the HTEqual strategy number to access/stratnum.h from
access/hash.h.

To avoid breaking third-party extension code, add an #include
"utils/hashutils.h" to access/hash.h.  (An easily removed line by
committers who enjoy their asbestos suits to protect them from angry
extension authors.)

Discussion: https://postgr.es/m/201901251935.ser5e4h6djt2@alvherre.pgsql
This commit is contained in:
Alvaro Herrera 2019-03-11 13:17:50 -03:00
parent b212245f96
commit af38498d4c
40 changed files with 690 additions and 687 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
contrib/citext/citext.c
View File

@ -3,10 +3,10 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "catalog/pg_collation.h"
#include "utils/builtins.h"
#include "utils/formatting.h"
#include "utils/hashutils.h"
#include "utils/varlena.h"
PG_MODULE_MAGIC;

2
contrib/hstore/hstore_op.c
View File

@ -3,11 +3,11 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "access/htup_details.h"
#include "catalog/pg_type.h"
#include "funcapi.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
#include "utils/memutils.h"
#include "hstore.h"

2
contrib/pg_stat_statements/pg_stat_statements.c
View File

@ -61,7 +61,6 @@
#include <sys/stat.h>
#include <unistd.h>
#include "access/hash.h"
#include "catalog/pg_authid.h"
#include "executor/instrument.h"
#include "funcapi.h"
@ -78,6 +77,7 @@
#include "tcop/utility.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
#include "utils/memutils.h"
PG_MODULE_MAGIC;

2
contrib/sepgsql/uavc.c
View File

@ -12,11 +12,11 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "catalog/pg_proc.h"
#include "commands/seclabel.h"
#include "storage/ipc.h"
#include "utils/guc.h"
#include "utils/hashutils.h"
#include "utils/memutils.h"
#include "sepgsql.h"

1
src/backend/access/common/tupdesc.c
View File

@ -19,7 +19,6 @@
#include "postgres.h"
#include "access/hash.h"
#include "access/htup_details.h"
#include "access/tupdesc_details.h"
#include "catalog/pg_collation.h"

627
src/backend/access/hash/hashfunc.c
View File

@ -28,6 +28,7 @@
#include "access/hash.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
/*
* Datatype-specific hash functions.
@ -307,629 +308,3 @@ hashvarlenaextended(PG_FUNCTION_ARGS)
return result;
}
/*
* This hash function was written by Bob Jenkins
* (bob_jenkins@burtleburtle.net), and superficially adapted
* for PostgreSQL by Neil Conway. For more information on this
* hash function, see http://burtleburtle.net/bob/hash/doobs.html,
* or Bob's article in Dr. Dobb's Journal, Sept. 1997.
*
* In the current code, we have adopted Bob's 2006 update of his hash
* function to fetch the data a word at a time when it is suitably aligned.
* This makes for a useful speedup, at the cost of having to maintain
* four code paths (aligned vs unaligned, and little-endian vs big-endian).
* It also uses two separate mixing functions mix() and final(), instead
* of a slower multi-purpose function.
*/
/* Get a bit mask of the bits set in non-uint32 aligned addresses */
#define UINT32_ALIGN_MASK (sizeof(uint32) - 1)
/* Rotate a uint32 value left by k bits - note multiple evaluation! */
#define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k))))
/*----------
* mix -- mix 3 32-bit values reversibly.
*
* This is reversible, so any information in (a,b,c) before mix() is
* still in (a,b,c) after mix().
*
* If four pairs of (a,b,c) inputs are run through mix(), or through
* mix() in reverse, there are at least 32 bits of the output that
* are sometimes the same for one pair and different for another pair.
* This was tested for:
* * pairs that differed by one bit, by two bits, in any combination
* of top bits of (a,b,c), or in any combination of bottom bits of
* (a,b,c).
* * "differ" is defined as +, -, ^, or ~^. For + and -, I transformed
* the output delta to a Gray code (a^(a>>1)) so a string of 1's (as
* is commonly produced by subtraction) look like a single 1-bit
* difference.
* * the base values were pseudorandom, all zero but one bit set, or
* all zero plus a counter that starts at zero.
*
* This does not achieve avalanche. There are input bits of (a,b,c)
* that fail to affect some output bits of (a,b,c), especially of a. The
* most thoroughly mixed value is c, but it doesn't really even achieve
* avalanche in c.
*
* This allows some parallelism. Read-after-writes are good at doubling
* the number of bits affected, so the goal of mixing pulls in the opposite
* direction from the goal of parallelism. I did what I could. Rotates
* seem to cost as much as shifts on every machine I could lay my hands on,
* and rotates are much kinder to the top and bottom bits, so I used rotates.
*----------
*/
#define mix(a,b,c) \
{ \
a -= c; a ^= rot(c, 4); c += b; \
b -= a; b ^= rot(a, 6); a += c; \
c -= b; c ^= rot(b, 8); b += a; \
a -= c; a ^= rot(c,16); c += b; \
b -= a; b ^= rot(a,19); a += c; \
c -= b; c ^= rot(b, 4); b += a; \
}
/*----------
* final -- final mixing of 3 32-bit values (a,b,c) into c
*
* Pairs of (a,b,c) values differing in only a few bits will usually
* produce values of c that look totally different. This was tested for
* * pairs that differed by one bit, by two bits, in any combination
* of top bits of (a,b,c), or in any combination of bottom bits of
* (a,b,c).
* * "differ" is defined as +, -, ^, or ~^. For + and -, I transformed
* the output delta to a Gray code (a^(a>>1)) so a string of 1's (as
* is commonly produced by subtraction) look like a single 1-bit
* difference.
* * the base values were pseudorandom, all zero but one bit set, or
* all zero plus a counter that starts at zero.
*
* The use of separate functions for mix() and final() allow for a
* substantial performance increase since final() does not need to
* do well in reverse, but is does need to affect all output bits.
* mix(), on the other hand, does not need to affect all output
* bits (affecting 32 bits is enough). The original hash function had
* a single mixing operation that had to satisfy both sets of requirements
* and was slower as a result.
*----------
*/
#define final(a,b,c) \
{ \
c ^= b; c -= rot(b,14); \
a ^= c; a -= rot(c,11); \
b ^= a; b -= rot(a,25); \
c ^= b; c -= rot(b,16); \
a ^= c; a -= rot(c, 4); \
b ^= a; b -= rot(a,14); \
c ^= b; c -= rot(b,24); \
}
/*
* hash_any() -- hash a variable-length key into a 32-bit value
* k : the key (the unaligned variable-length array of bytes)
* len : the length of the key, counting by bytes
*
* Returns a uint32 value. Every bit of the key affects every bit of
* the return value. Every 1-bit and 2-bit delta achieves avalanche.
* About 6*len+35 instructions. The best hash table sizes are powers
* of 2. There is no need to do mod a prime (mod is sooo slow!).
* If you need less than 32 bits, use a bitmask.
*
* This procedure must never throw elog(ERROR); the ResourceOwner code
* relies on this not to fail.
*
* Note: we could easily change this function to return a 64-bit hash value
* by using the final values of both b and c. b is perhaps a little less
* well mixed than c, however.
*/
Datum
hash_any(register const unsigned char *k, register int keylen)
{
register uint32 a,
b,
c,
len;
/* Set up the internal state */
len = keylen;
a = b = c = 0x9e3779b9 + len + 3923095;
/* If the source pointer is word-aligned, we use word-wide fetches */
if (((uintptr_t) k & UINT32_ALIGN_MASK) == 0)
{
/* Code path for aligned source data */
register const uint32 *ka = (const uint32 *) k;
/* handle most of the key */
while (len >= 12)
{
a += ka[0];
b += ka[1];
c += ka[2];
mix(a, b, c);
ka += 3;
len -= 12;
}
/* handle the last 11 bytes */
k = (const unsigned char *) ka;
#ifdef WORDS_BIGENDIAN
switch (len)
{
case 11:
c += ((uint32) k[10] << 8);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 24);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ka[1];
a += ka[0];
break;
case 7:
b += ((uint32) k[6] << 8);
/* fall through */
case 6:
b += ((uint32) k[5] << 16);
/* fall through */
case 5:
b += ((uint32) k[4] << 24);
/* fall through */
case 4:
a += ka[0];
break;
case 3:
a += ((uint32) k[2] << 8);
/* fall through */
case 2:
a += ((uint32) k[1] << 16);
/* fall through */
case 1:
a += ((uint32) k[0] << 24);
/* case 0: nothing left to add */
}
#else /* !WORDS_BIGENDIAN */
switch (len)
{
case 11:
c += ((uint32) k[10] << 24);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 8);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ka[1];
a += ka[0];
break;
case 7:
b += ((uint32) k[6] << 16);
/* fall through */
case 6:
b += ((uint32) k[5] << 8);
/* fall through */
case 5:
b += k[4];
/* fall through */
case 4:
a += ka[0];
break;
case 3:
a += ((uint32) k[2] << 16);
/* fall through */
case 2:
a += ((uint32) k[1] << 8);
/* fall through */
case 1:
a += k[0];
/* case 0: nothing left to add */
}
#endif /* WORDS_BIGENDIAN */
}
else
{
/* Code path for non-aligned source data */
/* handle most of the key */
while (len >= 12)
{
#ifdef WORDS_BIGENDIAN
a += (k[3] + ((uint32) k[2] << 8) + ((uint32) k[1] << 16) + ((uint32) k[0] << 24));
b += (k[7] + ((uint32) k[6] << 8) + ((uint32) k[5] << 16) + ((uint32) k[4] << 24));
c += (k[11] + ((uint32) k[10] << 8) + ((uint32) k[9] << 16) + ((uint32) k[8] << 24));
#else /* !WORDS_BIGENDIAN */
a += (k[0] + ((uint32) k[1] << 8) + ((uint32) k[2] << 16) + ((uint32) k[3] << 24));
b += (k[4] + ((uint32) k[5] << 8) + ((uint32) k[6] << 16) + ((uint32) k[7] << 24));
c += (k[8] + ((uint32) k[9] << 8) + ((uint32) k[10] << 16) + ((uint32) k[11] << 24));
#endif /* WORDS_BIGENDIAN */
mix(a, b, c);
k += 12;
len -= 12;
}
/* handle the last 11 bytes */
#ifdef WORDS_BIGENDIAN
switch (len)
{
case 11:
c += ((uint32) k[10] << 8);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 24);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += k[7];
/* fall through */
case 7:
b += ((uint32) k[6] << 8);
/* fall through */
case 6:
b += ((uint32) k[5] << 16);
/* fall through */
case 5:
b += ((uint32) k[4] << 24);
/* fall through */
case 4:
a += k[3];
/* fall through */
case 3:
a += ((uint32) k[2] << 8);
/* fall through */
case 2:
a += ((uint32) k[1] << 16);
/* fall through */
case 1:
a += ((uint32) k[0] << 24);
/* case 0: nothing left to add */
}
#else /* !WORDS_BIGENDIAN */
switch (len)
{
case 11:
c += ((uint32) k[10] << 24);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 8);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ((uint32) k[7] << 24);
/* fall through */
case 7:
b += ((uint32) k[6] << 16);
/* fall through */
case 6:
b += ((uint32) k[5] << 8);
/* fall through */
case 5:
b += k[4];
/* fall through */
case 4:
a += ((uint32) k[3] << 24);
/* fall through */
case 3:
a += ((uint32) k[2] << 16);
/* fall through */
case 2:
a += ((uint32) k[1] << 8);
/* fall through */
case 1:
a += k[0];
/* case 0: nothing left to add */
}
#endif /* WORDS_BIGENDIAN */
}
final(a, b, c);
/* report the result */
return UInt32GetDatum(c);
}
/*
* hash_any_extended() -- hash into a 64-bit value, using an optional seed
* k : the key (the unaligned variable-length array of bytes)
* len : the length of the key, counting by bytes
* seed : a 64-bit seed (0 means no seed)
*
* Returns a uint64 value. Otherwise similar to hash_any.
*/
Datum
hash_any_extended(register const unsigned char *k, register int keylen,
uint64 seed)
{
register uint32 a,
b,
c,
len;
/* Set up the internal state */
len = keylen;
a = b = c = 0x9e3779b9 + len + 3923095;
/* If the seed is non-zero, use it to perturb the internal state. */
if (seed != 0)
{
/*
* In essence, the seed is treated as part of the data being hashed,
* but for simplicity, we pretend that it's padded with four bytes of
* zeroes so that the seed constitutes a 12-byte chunk.
*/
a += (uint32) (seed >> 32);
b += (uint32) seed;
mix(a, b, c);
}
/* If the source pointer is word-aligned, we use word-wide fetches */
if (((uintptr_t) k & UINT32_ALIGN_MASK) == 0)
{
/* Code path for aligned source data */
register const uint32 *ka = (const uint32 *) k;
/* handle most of the key */
while (len >= 12)
{
a += ka[0];
b += ka[1];
c += ka[2];
mix(a, b, c);
ka += 3;
len -= 12;
}
/* handle the last 11 bytes */
k = (const unsigned char *) ka;
#ifdef WORDS_BIGENDIAN
switch (len)
{
case 11:
c += ((uint32) k[10] << 8);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 24);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ka[1];
a += ka[0];
break;
case 7:
b += ((uint32) k[6] << 8);
/* fall through */
case 6:
b += ((uint32) k[5] << 16);
/* fall through */
case 5:
b += ((uint32) k[4] << 24);
/* fall through */
case 4:
a += ka[0];
break;
case 3:
a += ((uint32) k[2] << 8);
/* fall through */
case 2:
a += ((uint32) k[1] << 16);
/* fall through */
case 1:
a += ((uint32) k[0] << 24);
/* case 0: nothing left to add */
}
#else /* !WORDS_BIGENDIAN */
switch (len)
{
case 11:
c += ((uint32) k[10] << 24);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 8);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ka[1];
a += ka[0];
break;
case 7:
b += ((uint32) k[6] << 16);
/* fall through */
case 6:
b += ((uint32) k[5] << 8);
/* fall through */
case 5:
b += k[4];
/* fall through */
case 4:
a += ka[0];
break;
case 3:
a += ((uint32) k[2] << 16);
/* fall through */
case 2:
a += ((uint32) k[1] << 8);
/* fall through */
case 1:
a += k[0];
/* case 0: nothing left to add */
}
#endif /* WORDS_BIGENDIAN */
}
else
{
/* Code path for non-aligned source data */
/* handle most of the key */
while (len >= 12)
{
#ifdef WORDS_BIGENDIAN
a += (k[3] + ((uint32) k[2] << 8) + ((uint32) k[1] << 16) + ((uint32) k[0] << 24));
b += (k[7] + ((uint32) k[6] << 8) + ((uint32) k[5] << 16) + ((uint32) k[4] << 24));
c += (k[11] + ((uint32) k[10] << 8) + ((uint32) k[9] << 16) + ((uint32) k[8] << 24));
#else /* !WORDS_BIGENDIAN */
a += (k[0] + ((uint32) k[1] << 8) + ((uint32) k[2] << 16) + ((uint32) k[3] << 24));
b += (k[4] + ((uint32) k[5] << 8) + ((uint32) k[6] << 16) + ((uint32) k[7] << 24));
c += (k[8] + ((uint32) k[9] << 8) + ((uint32) k[10] << 16) + ((uint32) k[11] << 24));
#endif /* WORDS_BIGENDIAN */
mix(a, b, c);
k += 12;
len -= 12;
}
/* handle the last 11 bytes */
#ifdef WORDS_BIGENDIAN
switch (len)
{
case 11:
c += ((uint32) k[10] << 8);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 24);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += k[7];
/* fall through */
case 7:
b += ((uint32) k[6] << 8);
/* fall through */
case 6:
b += ((uint32) k[5] << 16);
/* fall through */
case 5:
b += ((uint32) k[4] << 24);
/* fall through */
case 4:
a += k[3];
/* fall through */
case 3:
a += ((uint32) k[2] << 8);
/* fall through */
case 2:
a += ((uint32) k[1] << 16);
/* fall through */
case 1:
a += ((uint32) k[0] << 24);
/* case 0: nothing left to add */
}
#else /* !WORDS_BIGENDIAN */
switch (len)
{
case 11:
c += ((uint32) k[10] << 24);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 8);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ((uint32) k[7] << 24);
/* fall through */
case 7:
b += ((uint32) k[6] << 16);
/* fall through */
case 6:
b += ((uint32) k[5] << 8);
/* fall through */
case 5:
b += k[4];
/* fall through */
case 4:
a += ((uint32) k[3] << 24);
/* fall through */
case 3:
a += ((uint32) k[2] << 16);
/* fall through */
case 2:
a += ((uint32) k[1] << 8);
/* fall through */
case 1:
a += k[0];
/* case 0: nothing left to add */
}
#endif /* WORDS_BIGENDIAN */
}
final(a, b, c);
/* report the result */
PG_RETURN_UINT64(((uint64) b << 32) | c);
}
/*
* hash_uint32() -- hash a 32-bit value to a 32-bit value
*
* This has the same result as
* hash_any(&k, sizeof(uint32))
* but is faster and doesn't force the caller to store k into memory.
*/
Datum
hash_uint32(uint32 k)
{
register uint32 a,
b,
c;
a = b = c = 0x9e3779b9 + (uint32) sizeof(uint32) + 3923095;
a += k;
final(a, b, c);
/* report the result */
return UInt32GetDatum(c);
}
/*
* hash_uint32_extended() -- hash a 32-bit value to a 64-bit value, with a seed
*
* Like hash_uint32, this is a convenience function.
*/
Datum
hash_uint32_extended(uint32 k, uint64 seed)
{
register uint32 a,
b,
c;
a = b = c = 0x9e3779b9 + (uint32) sizeof(uint32) + 3923095;
if (seed != 0)
{
a += (uint32) (seed >> 32);
b += (uint32) seed;
mix(a, b, c);
}
a += k;
final(a, b, c);
/* report the result */
PG_RETURN_UINT64(((uint64) b << 32) | c);
}

2
src/backend/access/tablesample/bernoulli.c
View File

@ -26,11 +26,11 @@
#include <math.h>
#include "access/hash.h"
#include "access/tsmapi.h"
#include "catalog/pg_type.h"
#include "optimizer/optimizer.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
/* Private state */

2
src/backend/access/tablesample/system.c
View File

@ -26,13 +26,13 @@
#include <math.h>
#include "access/hash.h"
#include "access/heapam.h"
#include "access/relscan.h"
#include "access/tsmapi.h"
#include "catalog/pg_type.h"
#include "optimizer/optimizer.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
/* Private state */

1
src/backend/catalog/pg_publication.c
View File

@ -18,7 +18,6 @@
#include "miscadmin.h"
#include "access/genam.h"
#include "access/hash.h"
#include "access/heapam.h"
#include "access/htup_details.h"
#include "access/xact.h"

1
src/backend/commands/publicationcmds.c
View File

@ -18,7 +18,6 @@
#include "miscadmin.h"
#include "access/genam.h"
#include "access/hash.h"
#include "access/htup_details.h"
#include "access/table.h"
#include "access/xact.h"

1
src/backend/executor/execGrouping.c
View File

@ -18,7 +18,6 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "access/parallel.h"
#include "executor/executor.h"
#include "miscadmin.h"

2
src/backend/executor/nodeSamplescan.c
View File

@ -14,7 +14,6 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "access/heapam.h"
#include "access/relscan.h"
#include "access/tsmapi.h"
@ -22,6 +21,7 @@
#include "executor/nodeSamplescan.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "storage/bufmgr.h"
#include "storage/predicate.h"
#include "utils/builtins.h"
#include "utils/rel.h"

2
src/backend/lib/bloomfilter.c
View File

@ -35,9 +35,9 @@
#include <math.h>
#include "access/hash.h"
#include "lib/bloomfilter.h"
#include "port/pg_bitutils.h"
#include "utils/hashutils.h"
#define MAX_HASH_FUNCS 10

3
src/backend/nodes/bitmapset.c
View File

@ -20,9 +20,10 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "nodes/bitmapset.h"
#include "nodes/pg_list.h"
#include "port/pg_bitutils.h"
#include "utils/hashutils.h"
#define WORDNUM(x) ((x) / BITS_PER_BITMAPWORD)

4
src/backend/storage/file/sharedfileset.c
View File

@ -18,13 +18,15 @@
#include "postgres.h"
#include "access/hash.h"
#include <limits.h>
#include "catalog/pg_tablespace.h"
#include "commands/tablespace.h"
#include "miscadmin.h"
#include "storage/dsm.h"
#include "storage/sharedfileset.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
static void SharedFileSetOnDetach(dsm_segment *segment, Datum datum);
static void SharedFileSetPath(char *path, SharedFileSet *fileset, Oid tablespace);

2
src/backend/tsearch/ts_typanalyze.c
View File

@ -13,12 +13,12 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_operator.h"
#include "commands/vacuum.h"
#include "tsearch/ts_type.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
/* A hash key for lexemes */

2
src/backend/utils/adt/acl.c
View File

@ -16,7 +16,6 @@
#include <ctype.h>
#include "access/hash.h"
#include "access/htup_details.h"
#include "catalog/catalog.h"
#include "catalog/namespace.h"
@ -33,6 +32,7 @@
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/catcache.h"
#include "utils/hashutils.h"
#include "utils/inval.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"

1
src/backend/utils/adt/arrayfuncs.c
View File

@ -17,7 +17,6 @@
#include <ctype.h>
#include <math.h>
#include "access/hash.h"
#include "access/htup_details.h"
#include "catalog/pg_type.h"
#include "funcapi.h"

2
src/backend/utils/adt/date.c
View File

@ -20,7 +20,6 @@
#include <float.h>
#include <time.h>
#include "access/hash.h"
#include "access/xact.h"
#include "libpq/pqformat.h"
#include "miscadmin.h"
@ -30,6 +29,7 @@
#include "utils/builtins.h"
#include "utils/date.h"
#include "utils/datetime.h"
#include "utils/hashutils.h"
#include "utils/sortsupport.h"
/*

2
src/backend/utils/adt/jsonb_gin.c
View File

@ -14,11 +14,11 @@
#include "postgres.h"
#include "access/gin.h"
#include "access/hash.h"
#include "access/stratnum.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_type.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
#include "utils/jsonb.h"
#include "utils/varlena.h"

2
src/backend/utils/adt/jsonb_util.c
View File

@ -13,10 +13,10 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "catalog/pg_collation.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
#include "utils/jsonb.h"
#include "utils/memutils.h"
#include "utils/varlena.h"

2
src/backend/utils/adt/mac.c
View File

@ -13,12 +13,12 @@
#include "postgres.h"
#include "access/hash.h"
#include "lib/hyperloglog.h"
#include "libpq/pqformat.h"
#include "port/pg_bswap.h"
#include "utils/builtins.h"
#include "utils/guc.h"
#include "utils/hashutils.h"
#include "utils/inet.h"
#include "utils/sortsupport.h"

2
src/backend/utils/adt/mac8.c
View File

@ -21,9 +21,9 @@
#include "postgres.h"
#include "access/hash.h"
#include "libpq/pqformat.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
#include "utils/inet.h"
/*

3
src/backend/utils/adt/network.c
View File

@ -12,7 +12,7 @@
#include <netinet/in.h>
#include <arpa/inet.h>
#include "access/hash.h"
#include "access/stratnum.h"
#include "catalog/pg_opfamily.h"
#include "catalog/pg_type.h"
#include "common/ip.h"
@ -24,6 +24,7 @@
#include "nodes/supportnodes.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/hashutils.h"
#include "utils/inet.h"
#include "utils/lsyscache.h"

2
src/backend/utils/adt/numeric.c
View File

@ -26,7 +26,6 @@
#include <limits.h>
#include <math.h>
#include "access/hash.h"
#include "catalog/pg_type.h"
#include "common/int.h"
#include "funcapi.h"
@ -39,6 +38,7 @@
#include "utils/builtins.h"
#include "utils/float.h"
#include "utils/guc.h"
#include "utils/hashutils.h"
#include "utils/int8.h"
#include "utils/numeric.h"
#include "utils/sortsupport.h"

1
src/backend/utils/adt/pg_lsn.c
View File

@ -13,7 +13,6 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "funcapi.h"
#include "libpq/pqformat.h"
#include "utils/builtins.h"

3
src/backend/utils/adt/rangetypes.c
View File

@ -30,12 +30,13 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "access/tupmacs.h"
#include "lib/stringinfo.h"
#include "libpq/pqformat.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#include "utils/date.h"
#include "utils/hashutils.h"
#include "utils/int8.h"
#include "utils/lsyscache.h"
#include "utils/rangetypes.h"

2
src/backend/utils/adt/tid.c
View File

@ -20,7 +20,6 @@
#include <math.h>
#include <limits.h>
#include "access/hash.h"
#include "access/heapam.h"
#include "access/sysattr.h"
#include "catalog/namespace.h"
@ -30,6 +29,7 @@
#include "parser/parsetree.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
#include "utils/rel.h"
#include "utils/snapmgr.h"
#include "utils/varlena.h"

1
src/backend/utils/adt/timestamp.c
View File

@ -20,7 +20,6 @@
#include <limits.h>
#include <sys/time.h>
#include "access/hash.h"
#include "access/xact.h"
#include "catalog/pg_type.h"
#include "common/int128.h"

2
src/backend/utils/adt/uuid.c
View File

@ -13,12 +13,12 @@
#include "postgres.h"
#include "access/hash.h"
#include "lib/hyperloglog.h"
#include "libpq/pqformat.h"
#include "port/pg_bswap.h"
#include "utils/builtins.h"
#include "utils/guc.h"
#include "utils/hashutils.h"
#include "utils/sortsupport.h"
#include "utils/uuid.h"

3
src/backend/utils/adt/varchar.c
View File

@ -14,8 +14,6 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "access/tuptoaster.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_type.h"
@ -24,6 +22,7 @@
#include "nodes/supportnodes.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/hashutils.h"
#include "utils/varlena.h"
#include "mb/pg_wchar.h"

2
src/backend/utils/adt/varlena.c
View File

@ -17,7 +17,6 @@
#include <ctype.h>
#include <limits.h>
#include "access/hash.h"
#include "access/tuptoaster.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_type.h"
@ -30,6 +29,7 @@
#include "regex/regex.h"
#include "utils/builtins.h"
#include "utils/bytea.h"
#include "utils/hashutils.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
#include "utils/pg_locale.h"

1
src/backend/utils/cache/catcache.c vendored
View File

@ -15,7 +15,6 @@
#include "postgres.h"
#include "access/genam.h"
#include "access/hash.h"
#include "access/relscan.h"
#include "access/sysattr.h"
#include "access/table.h"

1
src/backend/utils/cache/relcache.c vendored
View File

@ -30,7 +30,6 @@
#include <fcntl.h>
#include <unistd.h>
#include "access/hash.h"
#include "access/htup_details.h"
#include "access/multixact.h"
#include "access/nbtree.h"

632
src/backend/utils/hash/hashfn.c
View File

@ -1,7 +1,8 @@
/*-------------------------------------------------------------------------
*
* hashfn.c
* Hash functions for use in dynahash.c hashtables
* Generic hashing functions, and hash functions for use in dynahash.c
* hashtables
*
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
@ -21,10 +22,637 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "fmgr.h"
#include "nodes/bitmapset.h"
#include "utils/hashutils.h"
#include "utils/hsearch.h"
/*
* This hash function was written by Bob Jenkins
* (bob_jenkins@burtleburtle.net), and superficially adapted
* for PostgreSQL by Neil Conway. For more information on this
* hash function, see http://burtleburtle.net/bob/hash/doobs.html,
* or Bob's article in Dr. Dobb's Journal, Sept. 1997.
*
* In the current code, we have adopted Bob's 2006 update of his hash
* function to fetch the data a word at a time when it is suitably aligned.
* This makes for a useful speedup, at the cost of having to maintain
* four code paths (aligned vs unaligned, and little-endian vs big-endian).
* It also uses two separate mixing functions mix() and final(), instead
* of a slower multi-purpose function.
*/
/* Get a bit mask of the bits set in non-uint32 aligned addresses */
#define UINT32_ALIGN_MASK (sizeof(uint32) - 1)
/* Rotate a uint32 value left by k bits - note multiple evaluation! */
#define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k))))
/*----------
* mix -- mix 3 32-bit values reversibly.
*
* This is reversible, so any information in (a,b,c) before mix() is
* still in (a,b,c) after mix().
*
* If four pairs of (a,b,c) inputs are run through mix(), or through
* mix() in reverse, there are at least 32 bits of the output that
* are sometimes the same for one pair and different for another pair.
* This was tested for:
* * pairs that differed by one bit, by two bits, in any combination
* of top bits of (a,b,c), or in any combination of bottom bits of
* (a,b,c).
* * "differ" is defined as +, -, ^, or ~^. For + and -, I transformed
* the output delta to a Gray code (a^(a>>1)) so a string of 1's (as
* is commonly produced by subtraction) look like a single 1-bit
* difference.
* * the base values were pseudorandom, all zero but one bit set, or
* all zero plus a counter that starts at zero.
*
* This does not achieve avalanche. There are input bits of (a,b,c)
* that fail to affect some output bits of (a,b,c), especially of a. The
* most thoroughly mixed value is c, but it doesn't really even achieve
* avalanche in c.
*
* This allows some parallelism. Read-after-writes are good at doubling
* the number of bits affected, so the goal of mixing pulls in the opposite
* direction from the goal of parallelism. I did what I could. Rotates
* seem to cost as much as shifts on every machine I could lay my hands on,
* and rotates are much kinder to the top and bottom bits, so I used rotates.
*----------
*/
#define mix(a,b,c) \
{ \
a -= c; a ^= rot(c, 4); c += b; \
b -= a; b ^= rot(a, 6); a += c; \
c -= b; c ^= rot(b, 8); b += a; \
a -= c; a ^= rot(c,16); c += b; \
b -= a; b ^= rot(a,19); a += c; \
c -= b; c ^= rot(b, 4); b += a; \
}
/*----------
* final -- final mixing of 3 32-bit values (a,b,c) into c
*
* Pairs of (a,b,c) values differing in only a few bits will usually
* produce values of c that look totally different. This was tested for
* * pairs that differed by one bit, by two bits, in any combination
* of top bits of (a,b,c), or in any combination of bottom bits of
* (a,b,c).
* * "differ" is defined as +, -, ^, or ~^. For + and -, I transformed
* the output delta to a Gray code (a^(a>>1)) so a string of 1's (as
* is commonly produced by subtraction) look like a single 1-bit
* difference.
* * the base values were pseudorandom, all zero but one bit set, or
* all zero plus a counter that starts at zero.
*
* The use of separate functions for mix() and final() allow for a
* substantial performance increase since final() does not need to
* do well in reverse, but is does need to affect all output bits.
* mix(), on the other hand, does not need to affect all output
* bits (affecting 32 bits is enough). The original hash function had
* a single mixing operation that had to satisfy both sets of requirements
* and was slower as a result.
*----------
*/
#define final(a,b,c) \
{ \
c ^= b; c -= rot(b,14); \
a ^= c; a -= rot(c,11); \
b ^= a; b -= rot(a,25); \
c ^= b; c -= rot(b,16); \
a ^= c; a -= rot(c, 4); \
b ^= a; b -= rot(a,14); \
c ^= b; c -= rot(b,24); \
}
/*
* hash_any() -- hash a variable-length key into a 32-bit value
* k : the key (the unaligned variable-length array of bytes)
* len : the length of the key, counting by bytes
*
* Returns a uint32 value. Every bit of the key affects every bit of
* the return value. Every 1-bit and 2-bit delta achieves avalanche.
* About 6*len+35 instructions. The best hash table sizes are powers
* of 2. There is no need to do mod a prime (mod is sooo slow!).
* If you need less than 32 bits, use a bitmask.
*
* This procedure must never throw elog(ERROR); the ResourceOwner code
* relies on this not to fail.
*
* Note: we could easily change this function to return a 64-bit hash value
* by using the final values of both b and c. b is perhaps a little less
* well mixed than c, however.
*/
Datum
hash_any(register const unsigned char *k, register int keylen)
{
register uint32 a,
b,
c,
len;
/* Set up the internal state */
len = keylen;
a = b = c = 0x9e3779b9 + len + 3923095;
/* If the source pointer is word-aligned, we use word-wide fetches */
if (((uintptr_t) k & UINT32_ALIGN_MASK) == 0)
{
/* Code path for aligned source data */
register const uint32 *ka = (const uint32 *) k;
/* handle most of the key */
while (len >= 12)
{
a += ka[0];
b += ka[1];
c += ka[2];
mix(a, b, c);
ka += 3;
len -= 12;
}
/* handle the last 11 bytes */
k = (const unsigned char *) ka;
#ifdef WORDS_BIGENDIAN
switch (len)
{
case 11:
c += ((uint32) k[10] << 8);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 24);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ka[1];
a += ka[0];
break;
case 7:
b += ((uint32) k[6] << 8);
/* fall through */
case 6:
b += ((uint32) k[5] << 16);
/* fall through */
case 5:
b += ((uint32) k[4] << 24);
/* fall through */
case 4:
a += ka[0];
break;
case 3:
a += ((uint32) k[2] << 8);
/* fall through */
case 2:
a += ((uint32) k[1] << 16);
/* fall through */
case 1:
a += ((uint32) k[0] << 24);
/* case 0: nothing left to add */
}
#else /* !WORDS_BIGENDIAN */
switch (len)
{
case 11:
c += ((uint32) k[10] << 24);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 8);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ka[1];
a += ka[0];
break;
case 7:
b += ((uint32) k[6] << 16);
/* fall through */
case 6:
b += ((uint32) k[5] << 8);
/* fall through */
case 5:
b += k[4];
/* fall through */
case 4:
a += ka[0];
break;
case 3:
a += ((uint32) k[2] << 16);
/* fall through */
case 2:
a += ((uint32) k[1] << 8);
/* fall through */
case 1:
a += k[0];
/* case 0: nothing left to add */
}
#endif /* WORDS_BIGENDIAN */
}
else
{
/* Code path for non-aligned source data */
/* handle most of the key */
while (len >= 12)
{
#ifdef WORDS_BIGENDIAN
a += (k[3] + ((uint32) k[2] << 8) + ((uint32) k[1] << 16) + ((uint32) k[0] << 24));
b += (k[7] + ((uint32) k[6] << 8) + ((uint32) k[5] << 16) + ((uint32) k[4] << 24));
c += (k[11] + ((uint32) k[10] << 8) + ((uint32) k[9] << 16) + ((uint32) k[8] << 24));
#else /* !WORDS_BIGENDIAN */
a += (k[0] + ((uint32) k[1] << 8) + ((uint32) k[2] << 16) + ((uint32) k[3] << 24));
b += (k[4] + ((uint32) k[5] << 8) + ((uint32) k[6] << 16) + ((uint32) k[7] << 24));
c += (k[8] + ((uint32) k[9] << 8) + ((uint32) k[10] << 16) + ((uint32) k[11] << 24));
#endif /* WORDS_BIGENDIAN */
mix(a, b, c);
k += 12;
len -= 12;
}
/* handle the last 11 bytes */
#ifdef WORDS_BIGENDIAN
switch (len)
{
case 11:
c += ((uint32) k[10] << 8);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 24);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += k[7];
/* fall through */
case 7:
b += ((uint32) k[6] << 8);
/* fall through */
case 6:
b += ((uint32) k[5] << 16);
/* fall through */
case 5:
b += ((uint32) k[4] << 24);
/* fall through */
case 4:
a += k[3];
/* fall through */
case 3:
a += ((uint32) k[2] << 8);
/* fall through */
case 2:
a += ((uint32) k[1] << 16);
/* fall through */
case 1:
a += ((uint32) k[0] << 24);
/* case 0: nothing left to add */
}
#else /* !WORDS_BIGENDIAN */
switch (len)
{
case 11:
c += ((uint32) k[10] << 24);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 8);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ((uint32) k[7] << 24);
/* fall through */
case 7:
b += ((uint32) k[6] << 16);
/* fall through */
case 6:
b += ((uint32) k[5] << 8);
/* fall through */
case 5:
b += k[4];
/* fall through */
case 4:
a += ((uint32) k[3] << 24);
/* fall through */
case 3:
a += ((uint32) k[2] << 16);
/* fall through */
case 2:
a += ((uint32) k[1] << 8);
/* fall through */
case 1:
a += k[0];
/* case 0: nothing left to add */
}
#endif /* WORDS_BIGENDIAN */
}
final(a, b, c);
/* report the result */
return UInt32GetDatum(c);
}
/*
* hash_any_extended() -- hash into a 64-bit value, using an optional seed
* k : the key (the unaligned variable-length array of bytes)
* len : the length of the key, counting by bytes
* seed : a 64-bit seed (0 means no seed)
*
* Returns a uint64 value. Otherwise similar to hash_any.
*/
Datum
hash_any_extended(register const unsigned char *k, register int keylen,
uint64 seed)
{
register uint32 a,
b,
c,
len;
/* Set up the internal state */
len = keylen;
a = b = c = 0x9e3779b9 + len + 3923095;
/* If the seed is non-zero, use it to perturb the internal state. */
if (seed != 0)
{
/*
* In essence, the seed is treated as part of the data being hashed,
* but for simplicity, we pretend that it's padded with four bytes of
* zeroes so that the seed constitutes a 12-byte chunk.
*/
a += (uint32) (seed >> 32);
b += (uint32) seed;
mix(a, b, c);
}
/* If the source pointer is word-aligned, we use word-wide fetches */
if (((uintptr_t) k & UINT32_ALIGN_MASK) == 0)
{
/* Code path for aligned source data */
register const uint32 *ka = (const uint32 *) k;
/* handle most of the key */
while (len >= 12)
{
a += ka[0];
b += ka[1];
c += ka[2];
mix(a, b, c);
ka += 3;
len -= 12;
}
/* handle the last 11 bytes */
k = (const unsigned char *) ka;
#ifdef WORDS_BIGENDIAN
switch (len)
{
case 11:
c += ((uint32) k[10] << 8);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 24);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ka[1];
a += ka[0];
break;
case 7:
b += ((uint32) k[6] << 8);
/* fall through */
case 6:
b += ((uint32) k[5] << 16);
/* fall through */
case 5:
b += ((uint32) k[4] << 24);
/* fall through */
case 4:
a += ka[0];
break;
case 3:
a += ((uint32) k[2] << 8);
/* fall through */
case 2:
a += ((uint32) k[1] << 16);
/* fall through */
case 1:
a += ((uint32) k[0] << 24);
/* case 0: nothing left to add */
}
#else /* !WORDS_BIGENDIAN */
switch (len)
{
case 11:
c += ((uint32) k[10] << 24);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 8);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ka[1];
a += ka[0];
break;
case 7:
b += ((uint32) k[6] << 16);
/* fall through */
case 6:
b += ((uint32) k[5] << 8);
/* fall through */
case 5:
b += k[4];
/* fall through */
case 4:
a += ka[0];
break;
case 3:
a += ((uint32) k[2] << 16);
/* fall through */
case 2:
a += ((uint32) k[1] << 8);
/* fall through */
case 1:
a += k[0];
/* case 0: nothing left to add */
}
#endif /* WORDS_BIGENDIAN */
}
else
{
/* Code path for non-aligned source data */
/* handle most of the key */
while (len >= 12)
{
#ifdef WORDS_BIGENDIAN
a += (k[3] + ((uint32) k[2] << 8) + ((uint32) k[1] << 16) + ((uint32) k[0] << 24));
b += (k[7] + ((uint32) k[6] << 8) + ((uint32) k[5] << 16) + ((uint32) k[4] << 24));
c += (k[11] + ((uint32) k[10] << 8) + ((uint32) k[9] << 16) + ((uint32) k[8] << 24));
#else /* !WORDS_BIGENDIAN */
a += (k[0] + ((uint32) k[1] << 8) + ((uint32) k[2] << 16) + ((uint32) k[3] << 24));
b += (k[4] + ((uint32) k[5] << 8) + ((uint32) k[6] << 16) + ((uint32) k[7] << 24));
c += (k[8] + ((uint32) k[9] << 8) + ((uint32) k[10] << 16) + ((uint32) k[11] << 24));
#endif /* WORDS_BIGENDIAN */
mix(a, b, c);
k += 12;
len -= 12;
}
/* handle the last 11 bytes */
#ifdef WORDS_BIGENDIAN
switch (len)
{
case 11:
c += ((uint32) k[10] << 8);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 24);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += k[7];
/* fall through */
case 7:
b += ((uint32) k[6] << 8);
/* fall through */
case 6:
b += ((uint32) k[5] << 16);
/* fall through */
case 5:
b += ((uint32) k[4] << 24);
/* fall through */
case 4:
a += k[3];
/* fall through */
case 3:
a += ((uint32) k[2] << 8);
/* fall through */
case 2:
a += ((uint32) k[1] << 16);
/* fall through */
case 1:
a += ((uint32) k[0] << 24);
/* case 0: nothing left to add */
}
#else /* !WORDS_BIGENDIAN */
switch (len)
{
case 11:
c += ((uint32) k[10] << 24);
/* fall through */
case 10:
c += ((uint32) k[9] << 16);
/* fall through */
case 9:
c += ((uint32) k[8] << 8);
/* fall through */
case 8:
/* the lowest byte of c is reserved for the length */
b += ((uint32) k[7] << 24);
/* fall through */
case 7:
b += ((uint32) k[6] << 16);
/* fall through */
case 6:
b += ((uint32) k[5] << 8);
/* fall through */
case 5:
b += k[4];
/* fall through */
case 4:
a += ((uint32) k[3] << 24);
/* fall through */
case 3:
a += ((uint32) k[2] << 16);
/* fall through */
case 2:
a += ((uint32) k[1] << 8);
/* fall through */
case 1:
a += k[0];
/* case 0: nothing left to add */
}
#endif /* WORDS_BIGENDIAN */
}
final(a, b, c);
/* report the result */
PG_RETURN_UINT64(((uint64) b << 32) | c);
}
/*
* hash_uint32() -- hash a 32-bit value to a 32-bit value
*
* This has the same result as
* hash_any(&k, sizeof(uint32))
* but is faster and doesn't force the caller to store k into memory.
*/
Datum
hash_uint32(uint32 k)
{
register uint32 a,
b,
c;
a = b = c = 0x9e3779b9 + (uint32) sizeof(uint32) + 3923095;
a += k;
final(a, b, c);
/* report the result */
return UInt32GetDatum(c);
}
/*
* hash_uint32_extended() -- hash a 32-bit value to a 64-bit value, with a seed
*
* Like hash_uint32, this is a convenience function.
*/
Datum
hash_uint32_extended(uint32 k, uint64 seed)
{
register uint32 a,
b,
c;
a = b = c = 0x9e3779b9 + (uint32) sizeof(uint32) + 3923095;
if (seed != 0)
{
a += (uint32) (seed >> 32);
b += (uint32) seed;
mix(a, b, c);
}
a += k;
final(a, b, c);
/* report the result */
PG_RETURN_UINT64(((uint64) b << 32) | c);
}
/*
* string_hash: hash function for keys that are NUL-terminated strings.
*

3
src/backend/utils/resowner/resowner.c
View File

@ -20,11 +20,12 @@
*/
#include "postgres.h"
#include "access/hash.h"
#include "jit/jit.h"
#include "storage/bufmgr.h"
#include "storage/ipc.h"
#include "storage/predicate.h"
#include "storage/proc.h"
#include "utils/hashutils.h"
#include "utils/memutils.h"
#include "utils/rel.h"
#include "utils/resowner_private.h"

2
src/backend/utils/sort/tuplesort.c
View File

@ -96,9 +96,9 @@
#include <limits.h>
#include "access/hash.h"
#include "access/htup_details.h"
#include "access/nbtree.h"
#include "access/hash.h"
#include "catalog/index.h"
#include "catalog/pg_am.h"
#include "commands/tablespace.h"

24
src/include/access/hash.h
View File

@ -24,6 +24,7 @@
#include "lib/stringinfo.h"
#include "storage/bufmgr.h"
#include "storage/lockdefs.h"
#include "utils/hashutils.h"
#include "utils/hsearch.h"
#include "utils/relcache.h"
@ -38,17 +39,6 @@ typedef uint32 Bucket;
#define BUCKET_TO_BLKNO(metap,B) \
((BlockNumber) ((B) + ((B) ? (metap)->hashm_spares[_hash_spareindex((B)+1)-1] : 0)) + 1)
/*
* Rotate the high 32 bits and the low 32 bits separately. The standard
* hash function sometimes rotates the low 32 bits by one bit when
* combining elements. We want extended hash functions to be compatible with
* that algorithm when the seed is 0, so we can't just do a normal rotation.
* This works, though.
*/
#define ROTATE_HIGH_AND_LOW_32BITS(v) \
((((v) << 1) & UINT64CONST(0xfffffffefffffffe)) | \
(((v) >> 31) & UINT64CONST(0x100000001)))
/*
* Special space for hash index pages.
*
@ -333,12 +323,6 @@ typedef HashMetaPageData *HashMetaPage;
#define HASH_WRITE BUFFER_LOCK_EXCLUSIVE
#define HASH_NOLOCK (-1)
/*
* Strategy number. There's only one valid strategy for hashing: equality.
*/
#define HTEqualStrategyNumber 1
#define HTMaxStrategyNumber 1
/*
* When a new operator class is declared, we require that the user supply
* us with an amproc function for hashing a key of the new type, returning
@ -380,12 +364,6 @@ extern IndexBulkDeleteResult *hashvacuumcleanup(IndexVacuumInfo *info,
extern bytea *hashoptions(Datum reloptions, bool validate);
extern bool hashvalidate(Oid opclassoid);
extern Datum hash_any(register const unsigned char *k, register int keylen);
extern Datum hash_any_extended(register const unsigned char *k,
register int keylen, uint64 seed);
extern Datum hash_uint32(uint32 k);
extern Datum hash_uint32_extended(uint32 k, uint64 seed);
/* private routines */
/* hashinsert.c */

7
src/include/access/stratnum.h
View File

@ -34,6 +34,13 @@ typedef uint16 StrategyNumber;
#define BTMaxStrategyNumber 5
/*
* Strategy numbers for hash indexes. There's only one valid strategy for
* hashing: equality.
*/
#define HTEqualStrategyNumber 1
#define HTMaxStrategyNumber 1
/*
* Strategy numbers common to (some) GiST, SP-GiST and BRIN opclasses.

19
src/include/utils/hashutils.h
View File

@ -7,6 +7,25 @@
#ifndef HASHUTILS_H
#define HASHUTILS_H
/*
* Rotate the high 32 bits and the low 32 bits separately. The standard
* hash function sometimes rotates the low 32 bits by one bit when
* combining elements. We want extended hash functions to be compatible with
* that algorithm when the seed is 0, so we can't just do a normal rotation.
* This works, though.
*/
#define ROTATE_HIGH_AND_LOW_32BITS(v) \
((((v) << 1) & UINT64CONST(0xfffffffefffffffe)) | \
(((v) >> 31) & UINT64CONST(0x100000001)))
extern Datum hash_any(register const unsigned char *k, register int keylen);
extern Datum hash_any_extended(register const unsigned char *k,
register int keylen, uint64 seed);
extern Datum hash_uint32(uint32 k);
extern Datum hash_uint32_extended(uint32 k, uint64 seed);
/*
* Combine two 32-bit hash values, resulting in another hash value, with
* decent bit mixing.