PostgreSQL Source Code  git master
blutils.c File Reference
#include "postgres.h"
#include "access/amapi.h"
#include "access/generic_xlog.h"
#include "catalog/index.h"
#include "storage/lmgr.h"
#include "miscadmin.h"
#include "storage/bufmgr.h"
#include "storage/indexfsm.h"
#include "utils/memutils.h"
#include "access/reloptions.h"
#include "storage/freespace.h"
#include "bloom.h"
Include dependency graph for blutils.c:

Go to the source code of this file.

Macros

#define GETWORD(x, i)   ( *( (BloomSignatureWord *)(x) + ( (i) / SIGNWORDBITS ) ) )
 
#define CLRBIT(x, i)   GETWORD(x,i) &= ~( 0x01 << ( (i) % SIGNWORDBITS ) )
 
#define SETBIT(x, i)   GETWORD(x,i) |= ( 0x01 << ( (i) % SIGNWORDBITS ) )
 
#define GETBIT(x, i)   ( (GETWORD(x,i) >> ( (i) % SIGNWORDBITS )) & 0x01 )
 

Functions

 PG_FUNCTION_INFO_V1 (blhandler)
 
static int32 myRand (void)
 
static void mySrand (uint32 seed)
 
void _PG_init (void)
 
static BloomOptionsmakeDefaultBloomOptions (void)
 
Datum blhandler (PG_FUNCTION_ARGS)
 
void initBloomState (BloomState *state, Relation index)
 
void signValue (BloomState *state, BloomSignatureWord *sign, Datum value, int attno)
 
BloomTupleBloomFormTuple (BloomState *state, ItemPointer iptr, Datum *values, bool *isnull)
 
bool BloomPageAddItem (BloomState *state, Page page, BloomTuple *tuple)
 
Buffer BloomNewBuffer (Relation index)
 
void BloomInitPage (Page page, uint16 flags)
 
void BloomFillMetapage (Relation index, Page metaPage)
 
void BloomInitMetapage (Relation index)
 
byteabloptions (Datum reloptions, bool validate)
 

Variables

static relopt_kind bl_relopt_kind
 
static relopt_parse_elt bl_relopt_tab [INDEX_MAX_KEYS+1]
 
static int32 next
 

Macro Definition Documentation

◆ CLRBIT

#define CLRBIT (   x,
  i 
)    GETWORD(x,i) &= ~( 0x01 << ( (i) % SIGNWORDBITS ) )

Definition at line 32 of file blutils.c.

Referenced by _hash_freeovflpage(), and hash_xlog_squeeze_page().

◆ GETBIT

#define GETBIT (   x,
  i 
)    ( (GETWORD(x,i) >> ( (i) % SIGNWORDBITS )) & 0x01 )

◆ GETWORD

#define GETWORD (   x,
  i 
)    ( *( (BloomSignatureWord *)(x) + ( (i) / SIGNWORDBITS ) ) )

Definition at line 31 of file blutils.c.

◆ SETBIT

#define SETBIT (   x,
  i 
)    GETWORD(x,i) |= ( 0x01 << ( (i) % SIGNWORDBITS ) )

Definition at line 33 of file blutils.c.

Referenced by _hash_addovflpage(), hash_xlog_add_ovfl_page(), makesign(), and signValue().

Function Documentation

◆ _PG_init()

void _PG_init ( void  )

Definition at line 53 of file blutils.c.

References add_int_reloption(), add_reloption_kind(), bl_relopt_kind, buf, DEFAULT_BLOOM_BITS, DEFAULT_BLOOM_LENGTH, i, INDEX_MAX_KEYS, MAX_BLOOM_BITS, MAX_BLOOM_LENGTH, MemoryContextStrdup(), relopt_parse_elt::offset, offsetof, relopt_parse_elt::optname, relopt_parse_elt::opttype, RELOPT_TYPE_INT, snprintf, and TopMemoryContext.

54 {
55  int i;
56  char buf[16];
57 
59 
60  /* Option for length of signature */
62  "Length of signature in bits",
64  bl_relopt_tab[0].optname = "length";
66  bl_relopt_tab[0].offset = offsetof(BloomOptions, bloomLength);
67 
68  /* Number of bits for each possible index column: col1, col2, ... */
69  for (i = 0; i < INDEX_MAX_KEYS; i++)
70  {
71  snprintf(buf, sizeof(buf), "col%d", i + 1);
73  "Number of bits generated for each index column",
76  buf);
78  bl_relopt_tab[i + 1].offset = offsetof(BloomOptions, bitSize[0]) + sizeof(int) * i;
79  }
80 }
relopt_type opttype
Definition: reloptions.h:126
#define MAX_BLOOM_LENGTH
Definition: bloom.h:91
#define DEFAULT_BLOOM_BITS
Definition: bloom.h:96
#define DEFAULT_BLOOM_LENGTH
Definition: bloom.h:90
void add_int_reloption(bits32 kinds, const char *name, const char *desc, int default_val, int min_val, int max_val)
Definition: reloptions.c:688
static relopt_kind bl_relopt_kind
Definition: blutils.c:39
static relopt_parse_elt bl_relopt_tab[INDEX_MAX_KEYS+1]
Definition: blutils.c:42
static char * buf
Definition: pg_test_fsync.c:68
MemoryContext TopMemoryContext
Definition: mcxt.c:44
const char * optname
Definition: reloptions.h:125
#define INDEX_MAX_KEYS
relopt_kind add_reloption_kind(void)
Definition: reloptions.c:573
#define MAX_BLOOM_BITS
Definition: bloom.h:97
char * MemoryContextStrdup(MemoryContext context, const char *string)
Definition: mcxt.c:1148
int i
#define snprintf
Definition: port.h:192
#define offsetof(type, field)
Definition: c.h:655

◆ blhandler()

Datum blhandler ( PG_FUNCTION_ARGS  )

Definition at line 105 of file blutils.c.

References IndexAmRoutine::ambeginscan, IndexAmRoutine::ambuild, IndexAmRoutine::ambuildempty, IndexAmRoutine::ambuildphasename, IndexAmRoutine::ambulkdelete, IndexAmRoutine::amcanbackward, IndexAmRoutine::amcaninclude, IndexAmRoutine::amcanmulticol, IndexAmRoutine::amcanorder, IndexAmRoutine::amcanorderbyop, IndexAmRoutine::amcanparallel, IndexAmRoutine::amcanreturn, IndexAmRoutine::amcanunique, IndexAmRoutine::amclusterable, IndexAmRoutine::amcostestimate, IndexAmRoutine::amendscan, IndexAmRoutine::amestimateparallelscan, IndexAmRoutine::amgetbitmap, IndexAmRoutine::amgettuple, IndexAmRoutine::aminitparallelscan, IndexAmRoutine::aminsert, IndexAmRoutine::amkeytype, IndexAmRoutine::ammarkpos, IndexAmRoutine::amoptionalkey, IndexAmRoutine::amoptions, IndexAmRoutine::amparallelrescan, IndexAmRoutine::ampredlocks, IndexAmRoutine::amproperty, IndexAmRoutine::amrescan, IndexAmRoutine::amrestrpos, IndexAmRoutine::amsearcharray, IndexAmRoutine::amsearchnulls, IndexAmRoutine::amstorage, IndexAmRoutine::amstrategies, IndexAmRoutine::amsupport, IndexAmRoutine::amvacuumcleanup, IndexAmRoutine::amvalidate, blbeginscan(), blbuild(), blbuildempty(), blbulkdelete(), blcostestimate(), blendscan(), blgetbitmap(), blinsert(), BLOOM_NPROC, BLOOM_NSTRATEGIES, bloptions(), blrescan(), blvacuumcleanup(), blvalidate(), InvalidOid, makeNode, and PG_RETURN_POINTER.

106 {
107  IndexAmRoutine *amroutine = makeNode(IndexAmRoutine);
108 
109  amroutine->amstrategies = BLOOM_NSTRATEGIES;
110  amroutine->amsupport = BLOOM_NPROC;
111  amroutine->amcanorder = false;
112  amroutine->amcanorderbyop = false;
113  amroutine->amcanbackward = false;
114  amroutine->amcanunique = false;
115  amroutine->amcanmulticol = true;
116  amroutine->amoptionalkey = true;
117  amroutine->amsearcharray = false;
118  amroutine->amsearchnulls = false;
119  amroutine->amstorage = false;
120  amroutine->amclusterable = false;
121  amroutine->ampredlocks = false;
122  amroutine->amcanparallel = false;
123  amroutine->amcaninclude = false;
124  amroutine->amkeytype = InvalidOid;
125 
126  amroutine->ambuild = blbuild;
127  amroutine->ambuildempty = blbuildempty;
128  amroutine->aminsert = blinsert;
129  amroutine->ambulkdelete = blbulkdelete;
130  amroutine->amvacuumcleanup = blvacuumcleanup;
131  amroutine->amcanreturn = NULL;
132  amroutine->amcostestimate = blcostestimate;
133  amroutine->amoptions = bloptions;
134  amroutine->amproperty = NULL;
135  amroutine->ambuildphasename = NULL;
136  amroutine->amvalidate = blvalidate;
137  amroutine->ambeginscan = blbeginscan;
138  amroutine->amrescan = blrescan;
139  amroutine->amgettuple = NULL;
140  amroutine->amgetbitmap = blgetbitmap;
141  amroutine->amendscan = blendscan;
142  amroutine->ammarkpos = NULL;
143  amroutine->amrestrpos = NULL;
144  amroutine->amestimateparallelscan = NULL;
145  amroutine->aminitparallelscan = NULL;
146  amroutine->amparallelrescan = NULL;
147 
148  PG_RETURN_POINTER(amroutine);
149 }
ambeginscan_function ambeginscan
Definition: amapi.h:221
#define PG_RETURN_POINTER(x)
Definition: fmgr.h:351
ambulkdelete_function ambulkdelete
Definition: amapi.h:213
bool amcanmulticol
Definition: amapi.h:183
uint16 amsupport
Definition: amapi.h:173
IndexBuildResult * blbuild(Relation heap, Relation index, IndexInfo *indexInfo)
Definition: blinsert.c:123
amgettuple_function amgettuple
Definition: amapi.h:223
bool amcanorderbyop
Definition: amapi.h:177
amproperty_function amproperty
Definition: amapi.h:218
amparallelrescan_function amparallelrescan
Definition: amapi.h:232
#define BLOOM_NPROC
Definition: bloom.h:25
bool amstorage
Definition: amapi.h:191
bool ampredlocks
Definition: amapi.h:195
aminsert_function aminsert
Definition: amapi.h:212
Oid amkeytype
Definition: amapi.h:201
void blcostestimate(PlannerInfo *root, IndexPath *path, double loop_count, Cost *indexStartupCost, Cost *indexTotalCost, Selectivity *indexSelectivity, double *indexCorrelation, double *indexPages)
Definition: blcost.c:24
bool amoptionalkey
Definition: amapi.h:185
amvalidate_function amvalidate
Definition: amapi.h:220
IndexBulkDeleteResult * blvacuumcleanup(IndexVacuumInfo *info, IndexBulkDeleteResult *stats)
Definition: blvacuum.c:169
bool blvalidate(Oid opclassoid)
Definition: blvalidate.c:33
void blendscan(IndexScanDesc scan)
Definition: blscan.c:69
amgetbitmap_function amgetbitmap
Definition: amapi.h:224
ambuild_function ambuild
Definition: amapi.h:210
amoptions_function amoptions
Definition: amapi.h:217
bool amcaninclude
Definition: amapi.h:199
amcostestimate_function amcostestimate
Definition: amapi.h:216
bool amcanunique
Definition: amapi.h:181
IndexBulkDeleteResult * blbulkdelete(IndexVacuumInfo *info, IndexBulkDeleteResult *stats, IndexBulkDeleteCallback callback, void *callback_state)
Definition: blvacuum.c:34
amvacuumcleanup_function amvacuumcleanup
Definition: amapi.h:214
amendscan_function amendscan
Definition: amapi.h:225
bool amcanbackward
Definition: amapi.h:179
int64 blgetbitmap(IndexScanDesc scan, TIDBitmap *tbm)
Definition: blscan.c:82
amrescan_function amrescan
Definition: amapi.h:222
bool amcanparallel
Definition: amapi.h:197
#define BLOOM_NSTRATEGIES
Definition: bloom.h:29
bool amsearchnulls
Definition: amapi.h:189
void blrescan(IndexScanDesc scan, ScanKey scankey, int nscankeys, ScanKey orderbys, int norderbys)
Definition: blscan.c:49
bool amclusterable
Definition: amapi.h:193
bool amsearcharray
Definition: amapi.h:187
#define InvalidOid
Definition: postgres_ext.h:36
#define makeNode(_type_)
Definition: nodes.h:572
bool blinsert(Relation index, Datum *values, bool *isnull, ItemPointer ht_ctid, Relation heapRel, IndexUniqueCheck checkUnique, IndexInfo *indexInfo)
Definition: blinsert.c:199
ammarkpos_function ammarkpos
Definition: amapi.h:226
bool amcanorder
Definition: amapi.h:175
ambuildphasename_function ambuildphasename
Definition: amapi.h:219
amestimateparallelscan_function amestimateparallelscan
Definition: amapi.h:230
void blbuildempty(Relation index)
Definition: blinsert.c:166
uint16 amstrategies
Definition: amapi.h:171
IndexScanDesc blbeginscan(Relation r, int nkeys, int norderbys)
Definition: blscan.c:29
ambuildempty_function ambuildempty
Definition: amapi.h:211
bytea * bloptions(Datum reloptions, bool validate)
Definition: blutils.c:476
amcanreturn_function amcanreturn
Definition: amapi.h:215
aminitparallelscan_function aminitparallelscan
Definition: amapi.h:231
amrestrpos_function amrestrpos
Definition: amapi.h:227

◆ BloomFillMetapage()

void BloomFillMetapage ( Relation  index,
Page  metaPage 
)

Definition at line 417 of file blutils.c.

References Assert, BLOOM_MAGICK_NUMBER, BLOOM_META, BloomInitPage(), BloomPageGetMeta, BloomMetaPageData::magickNumber, makeDefaultBloomOptions(), BloomMetaPageData::opts, and RelationData::rd_options.

Referenced by blbuildempty(), and BloomInitMetapage().

418 {
419  BloomOptions *opts;
420  BloomMetaPageData *metadata;
421 
422  /*
423  * Choose the index's options. If reloptions have been assigned, use
424  * those, otherwise create default options.
425  */
426  opts = (BloomOptions *) index->rd_options;
427  if (!opts)
428  opts = makeDefaultBloomOptions();
429 
430  /*
431  * Initialize contents of meta page, including a copy of the options,
432  * which are now frozen for the life of the index.
433  */
434  BloomInitPage(metaPage, BLOOM_META);
435  metadata = BloomPageGetMeta(metaPage);
436  memset(metadata, 0, sizeof(BloomMetaPageData));
437  metadata->magickNumber = BLOOM_MAGICK_NUMBER;
438  metadata->opts = *opts;
439  ((PageHeader) metaPage)->pd_lower += sizeof(BloomMetaPageData);
440 
441  /* If this fails, probably FreeBlockNumberArray size calc is wrong: */
442  Assert(((PageHeader) metaPage)->pd_lower <= ((PageHeader) metaPage)->pd_upper);
443 }
static BloomOptions * makeDefaultBloomOptions(void)
Definition: blutils.c:86
#define BloomPageGetMeta(page)
Definition: bloom.h:135
BloomOptions opts
Definition: bloom.h:125
PageHeaderData * PageHeader
Definition: bufpage.h:166
#define Assert(condition)
Definition: c.h:732
uint32 magickNumber
Definition: bloom.h:122
void BloomInitPage(Page page, uint16 flags)
Definition: blutils.c:401
#define BLOOM_META
Definition: bloom.h:45
struct BloomMetaPageData BloomMetaPageData
#define BLOOM_MAGICK_NUMBER
Definition: bloom.h:130
bytea * rd_options
Definition: rel.h:126

◆ BloomFormTuple()

BloomTuple* BloomFormTuple ( BloomState state,
ItemPointer  iptr,
Datum values,
bool isnull 
)

Definition at line 287 of file blutils.c.

References BloomTuple::heapPtr, i, BloomState::nColumns, palloc0(), BloomTuple::sign, signValue(), and BloomState::sizeOfBloomTuple.

Referenced by blinsert(), and bloomBuildCallback().

288 {
289  int i;
290  BloomTuple *res = (BloomTuple *) palloc0(state->sizeOfBloomTuple);
291 
292  res->heapPtr = *iptr;
293 
294  /* Blooming each column */
295  for (i = 0; i < state->nColumns; i++)
296  {
297  /* skip nulls */
298  if (isnull[i])
299  continue;
300 
301  signValue(state, res->sign, values[i], i);
302  }
303 
304  return res;
305 }
void * palloc0(Size size)
Definition: mcxt.c:955
void signValue(BloomState *state, BloomSignatureWord *sign, Datum value, int attno)
Definition: blutils.c:254
int32 nColumns
Definition: bloom.h:142
BloomSignatureWord sign[FLEXIBLE_ARRAY_MEMBER]
Definition: bloom.h:162
static Datum values[MAXATTR]
Definition: bootstrap.c:167
ItemPointerData heapPtr
Definition: bloom.h:161
int i
Size sizeOfBloomTuple
Definition: bloom.h:148

◆ BloomInitMetapage()

void BloomInitMetapage ( Relation  index)

Definition at line 449 of file blutils.c.

References Assert, BLOOM_METAPAGE_BLKNO, BloomFillMetapage(), BloomNewBuffer(), BufferGetBlockNumber(), GENERIC_XLOG_FULL_IMAGE, GenericXLogFinish(), GenericXLogRegisterBuffer(), GenericXLogStart(), and UnlockReleaseBuffer().

Referenced by blbuild().

450 {
451  Buffer metaBuffer;
452  Page metaPage;
454 
455  /*
456  * Make a new page; since it is first page it should be associated with
457  * block number 0 (BLOOM_METAPAGE_BLKNO).
458  */
459  metaBuffer = BloomNewBuffer(index);
461 
462  /* Initialize contents of meta page */
463  state = GenericXLogStart(index);
464  metaPage = GenericXLogRegisterBuffer(state, metaBuffer,
466  BloomFillMetapage(index, metaPage);
467  GenericXLogFinish(state);
468 
469  UnlockReleaseBuffer(metaBuffer);
470 }
#define BLOOM_METAPAGE_BLKNO
Definition: bloom.h:77
Page GenericXLogRegisterBuffer(GenericXLogState *state, Buffer buffer, int flags)
Definition: generic_xlog.c:295
Buffer BloomNewBuffer(Relation index)
Definition: blutils.c:347
void UnlockReleaseBuffer(Buffer buffer)
Definition: bufmgr.c:3376
void BloomFillMetapage(Relation index, Page metaPage)
Definition: blutils.c:417
#define Assert(condition)
Definition: c.h:732
Definition: regguts.h:298
XLogRecPtr GenericXLogFinish(GenericXLogState *state)
Definition: generic_xlog.c:333
BlockNumber BufferGetBlockNumber(Buffer buffer)
Definition: bufmgr.c:2613
int Buffer
Definition: buf.h:23
#define GENERIC_XLOG_FULL_IMAGE
Definition: generic_xlog.h:26
GenericXLogState * GenericXLogStart(Relation relation)
Definition: generic_xlog.c:267
Pointer Page
Definition: bufpage.h:78

◆ BloomInitPage()

void BloomInitPage ( Page  page,
uint16  flags 
)

Definition at line 401 of file blutils.c.

References BloomPageOpaqueData::bloom_page_id, BLOOM_PAGE_ID, BloomPageGetOpaque, BloomPageOpaqueData::flags, and PageInit().

Referenced by blinsert(), BloomFillMetapage(), and initCachedPage().

402 {
403  BloomPageOpaque opaque;
404 
405  PageInit(page, BLCKSZ, sizeof(BloomPageOpaqueData));
406 
407  opaque = BloomPageGetOpaque(page);
408  memset(opaque, 0, sizeof(BloomPageOpaqueData));
409  opaque->flags = flags;
410  opaque->bloom_page_id = BLOOM_PAGE_ID;
411 }
#define BLOOM_PAGE_ID
Definition: bloom.h:56
uint16 bloom_page_id
Definition: bloom.h:39
uint16 flags
Definition: bloom.h:35
#define BloomPageGetOpaque(page)
Definition: bloom.h:59
void PageInit(Page page, Size pageSize, Size specialSize)
Definition: bufpage.c:42

◆ BloomNewBuffer()

Buffer BloomNewBuffer ( Relation  index)

Definition at line 347 of file blutils.c.

References BloomPageIsDeleted, BUFFER_LOCK_EXCLUSIVE, BUFFER_LOCK_UNLOCK, BufferGetPage, ConditionalLockBuffer(), ExclusiveLock, GetFreeIndexPage(), InvalidBlockNumber, LockBuffer(), LockRelationForExtension(), P_NEW, PageIsNew, ReadBuffer(), RELATION_IS_LOCAL, ReleaseBuffer(), and UnlockRelationForExtension().

Referenced by blinsert(), BloomInitMetapage(), and flushCachedPage().

348 {
349  Buffer buffer;
350  bool needLock;
351 
352  /* First, try to get a page from FSM */
353  for (;;)
354  {
355  BlockNumber blkno = GetFreeIndexPage(index);
356 
357  if (blkno == InvalidBlockNumber)
358  break;
359 
360  buffer = ReadBuffer(index, blkno);
361 
362  /*
363  * We have to guard against the possibility that someone else already
364  * recycled this page; the buffer may be locked if so.
365  */
366  if (ConditionalLockBuffer(buffer))
367  {
368  Page page = BufferGetPage(buffer);
369 
370  if (PageIsNew(page))
371  return buffer; /* OK to use, if never initialized */
372 
373  if (BloomPageIsDeleted(page))
374  return buffer; /* OK to use */
375 
377  }
378 
379  /* Can't use it, so release buffer and try again */
380  ReleaseBuffer(buffer);
381  }
382 
383  /* Must extend the file */
384  needLock = !RELATION_IS_LOCAL(index);
385  if (needLock)
387 
388  buffer = ReadBuffer(index, P_NEW);
390 
391  if (needLock)
393 
394  return buffer;
395 }
#define BUFFER_LOCK_UNLOCK
Definition: bufmgr.h:86
#define BloomPageIsDeleted(page)
Definition: bloom.h:63
#define ExclusiveLock
Definition: lockdefs.h:44
#define RELATION_IS_LOCAL(relation)
Definition: rel.h:536
uint32 BlockNumber
Definition: block.h:31
void ReleaseBuffer(Buffer buffer)
Definition: bufmgr.c:3353
#define P_NEW
Definition: bufmgr.h:81
#define BUFFER_LOCK_EXCLUSIVE
Definition: bufmgr.h:88
#define BufferGetPage(buffer)
Definition: bufmgr.h:159
bool ConditionalLockBuffer(Buffer buffer)
Definition: bufmgr.c:3616
void LockRelationForExtension(Relation relation, LOCKMODE lockmode)
Definition: lmgr.c:402
void UnlockRelationForExtension(Relation relation, LOCKMODE lockmode)
Definition: lmgr.c:452
void LockBuffer(Buffer buffer, int mode)
Definition: bufmgr.c:3590
BlockNumber GetFreeIndexPage(Relation rel)
Definition: indexfsm.c:38
Buffer ReadBuffer(Relation reln, BlockNumber blockNum)
Definition: bufmgr.c:596
#define InvalidBlockNumber
Definition: block.h:33
#define PageIsNew(page)
Definition: bufpage.h:229
int Buffer
Definition: buf.h:23
Pointer Page
Definition: bufpage.h:78

◆ BloomPageAddItem()

bool BloomPageAddItem ( BloomState state,
Page  page,
BloomTuple tuple 
)

Definition at line 312 of file blutils.c.

References Assert, BloomPageGetFreeSpace, BloomPageGetOpaque, BloomPageGetTuple, BloomPageIsDeleted, BloomPageOpaqueData::maxoff, PageIsNew, and BloomState::sizeOfBloomTuple.

Referenced by blinsert(), and bloomBuildCallback().

313 {
314  BloomTuple *itup;
315  BloomPageOpaque opaque;
316  Pointer ptr;
317 
318  /* We shouldn't be pointed to an invalid page */
319  Assert(!PageIsNew(page) && !BloomPageIsDeleted(page));
320 
321  /* Does new tuple fit on the page? */
322  if (BloomPageGetFreeSpace(state, page) < state->sizeOfBloomTuple)
323  return false;
324 
325  /* Copy new tuple to the end of page */
326  opaque = BloomPageGetOpaque(page);
327  itup = BloomPageGetTuple(state, page, opaque->maxoff + 1);
328  memcpy((Pointer) itup, (Pointer) tuple, state->sizeOfBloomTuple);
329 
330  /* Adjust maxoff and pd_lower */
331  opaque->maxoff++;
332  ptr = (Pointer) BloomPageGetTuple(state, page, opaque->maxoff + 1);
333  ((PageHeader) page)->pd_lower = ptr - page;
334 
335  /* Assert we didn't overrun available space */
336  Assert(((PageHeader) page)->pd_lower <= ((PageHeader) page)->pd_upper);
337 
338  return true;
339 }
#define BloomPageIsDeleted(page)
Definition: bloom.h:63
OffsetNumber maxoff
Definition: bloom.h:34
char * Pointer
Definition: c.h:335
#define BloomPageGetOpaque(page)
Definition: bloom.h:59
#define BloomPageGetFreeSpace(state, page)
Definition: bloom.h:151
#define BloomPageGetTuple(state, page, offset)
Definition: bloom.h:70
PageHeaderData * PageHeader
Definition: bufpage.h:166
#define Assert(condition)
Definition: c.h:732
#define PageIsNew(page)
Definition: bufpage.h:229
Size sizeOfBloomTuple
Definition: bloom.h:148

◆ bloptions()

bytea* bloptions ( Datum  reloptions,
bool  validate 
)

Definition at line 476 of file blutils.c.

References allocateReloptStruct(), bl_relopt_kind, fillRelOptions(), lengthof, options, parseRelOptions(), and SIGNWORDBITS.

Referenced by blhandler().

477 {
479  int numoptions;
480  BloomOptions *rdopts;
481 
482  /* Parse the user-given reloptions */
483  options = parseRelOptions(reloptions, validate, bl_relopt_kind, &numoptions);
484  rdopts = allocateReloptStruct(sizeof(BloomOptions), options, numoptions);
485  fillRelOptions((void *) rdopts, sizeof(BloomOptions), options, numoptions,
486  validate, bl_relopt_tab, lengthof(bl_relopt_tab));
487 
488  /* Convert signature length from # of bits to # to words, rounding up */
489  rdopts->bloomLength = (rdopts->bloomLength + SIGNWORDBITS - 1) / SIGNWORDBITS;
490 
491  return (bytea *) rdopts;
492 }
#define lengthof(array)
Definition: c.h:662
static relopt_kind bl_relopt_kind
Definition: blutils.c:39
static relopt_parse_elt bl_relopt_tab[INDEX_MAX_KEYS+1]
Definition: blutils.c:42
#define SIGNWORDBITS
Definition: bloom.h:85
void * allocateReloptStruct(Size base, relopt_value *options, int numoptions)
Definition: reloptions.c:1268
static char ** options
void fillRelOptions(void *rdopts, Size basesize, relopt_value *options, int numoptions, bool validate, const relopt_parse_elt *elems, int numelems)
Definition: reloptions.c:1292
Definition: c.h:549
relopt_value * parseRelOptions(Datum options, bool validate, relopt_kind kind, int *numrelopts)
Definition: reloptions.c:1074

◆ initBloomState()

void initBloomState ( BloomState state,
Relation  index 
)

Definition at line 155 of file blutils.c.

References BLOOM_HASH_PROC, BLOOM_MAGICK_NUMBER, BLOOM_METAPAGE_BLKNO, BloomOptions::bloomLength, BloomPageGetMeta, BloomPageIsMeta, BLOOMTUPLEHDRSZ, BUFFER_LOCK_SHARE, BufferGetPage, BloomState::collations, CurrentMemoryContext, elog, ERROR, fmgr_info_copy(), BloomState::hashFn, i, index_getprocinfo(), LockBuffer(), BloomMetaPageData::magickNumber, MemoryContextAlloc(), TupleDescData::natts, BloomState::nColumns, BloomMetaPageData::opts, BloomState::opts, RelationData::rd_amcache, RelationData::rd_att, RelationData::rd_indcollation, RelationData::rd_indexcxt, ReadBuffer(), BloomState::sizeOfBloomTuple, and UnlockReleaseBuffer().

Referenced by blbeginscan(), blbuild(), blbulkdelete(), and blinsert().

156 {
157  int i;
158 
159  state->nColumns = index->rd_att->natts;
160 
161  /* Initialize hash function for each attribute */
162  for (i = 0; i < index->rd_att->natts; i++)
163  {
164  fmgr_info_copy(&(state->hashFn[i]),
165  index_getprocinfo(index, i + 1, BLOOM_HASH_PROC),
167  state->collations[i] = index->rd_indcollation[i];
168  }
169 
170  /* Initialize amcache if needed with options from metapage */
171  if (!index->rd_amcache)
172  {
173  Buffer buffer;
174  Page page;
175  BloomMetaPageData *meta;
176  BloomOptions *opts;
177 
178  opts = MemoryContextAlloc(index->rd_indexcxt, sizeof(BloomOptions));
179 
180  buffer = ReadBuffer(index, BLOOM_METAPAGE_BLKNO);
181  LockBuffer(buffer, BUFFER_LOCK_SHARE);
182 
183  page = BufferGetPage(buffer);
184 
185  if (!BloomPageIsMeta(page))
186  elog(ERROR, "Relation is not a bloom index");
187  meta = BloomPageGetMeta(BufferGetPage(buffer));
188 
189  if (meta->magickNumber != BLOOM_MAGICK_NUMBER)
190  elog(ERROR, "Relation is not a bloom index");
191 
192  *opts = meta->opts;
193 
194  UnlockReleaseBuffer(buffer);
195 
196  index->rd_amcache = (void *) opts;
197  }
198 
199  memcpy(&state->opts, index->rd_amcache, sizeof(state->opts));
201  sizeof(BloomSignatureWord) * state->opts.bloomLength;
202 }
#define BLOOM_METAPAGE_BLKNO
Definition: bloom.h:77
BloomOptions opts
Definition: bloom.h:141
FmgrInfo * index_getprocinfo(Relation irel, AttrNumber attnum, uint16 procnum)
Definition: indexam.c:794
#define BloomPageIsMeta(page)
Definition: bloom.h:61
FmgrInfo hashFn[INDEX_MAX_KEYS]
Definition: bloom.h:139
Oid collations[INDEX_MAX_KEYS]
Definition: bloom.h:140
uint16 BloomSignatureWord
Definition: bloom.h:83
void UnlockReleaseBuffer(Buffer buffer)
Definition: bufmgr.c:3376
Oid * rd_indcollation
Definition: rel.h:168
#define ERROR
Definition: elog.h:43
void fmgr_info_copy(FmgrInfo *dstinfo, FmgrInfo *srcinfo, MemoryContext destcxt)
Definition: fmgr.c:610
MemoryContext CurrentMemoryContext
Definition: mcxt.c:38
#define BufferGetPage(buffer)
Definition: bufmgr.h:159
#define BloomPageGetMeta(page)
Definition: bloom.h:135
#define BLOOMTUPLEHDRSZ
Definition: bloom.h:165
BloomOptions opts
Definition: bloom.h:125
void LockBuffer(Buffer buffer, int mode)
Definition: bufmgr.c:3590
int32 nColumns
Definition: bloom.h:142
TupleDesc rd_att
Definition: rel.h:84
Buffer ReadBuffer(Relation reln, BlockNumber blockNum)
Definition: bufmgr.c:596
int bloomLength
Definition: bloom.h:103
uint32 magickNumber
Definition: bloom.h:122
void * MemoryContextAlloc(MemoryContext context, Size size)
Definition: mcxt.c:771
#define elog(elevel,...)
Definition: elog.h:226
MemoryContext rd_indexcxt
Definition: rel.h:155
int i
#define BUFFER_LOCK_SHARE
Definition: bufmgr.h:87
void * rd_amcache
Definition: rel.h:179
#define BLOOM_MAGICK_NUMBER
Definition: bloom.h:130
Size sizeOfBloomTuple
Definition: bloom.h:148
int Buffer
Definition: buf.h:23
#define BLOOM_HASH_PROC
Definition: bloom.h:24
Pointer Page
Definition: bufpage.h:78

◆ makeDefaultBloomOptions()

static BloomOptions* makeDefaultBloomOptions ( void  )
static

Definition at line 86 of file blutils.c.

References BloomOptions::bitSize, BloomOptions::bloomLength, DEFAULT_BLOOM_BITS, DEFAULT_BLOOM_LENGTH, i, INDEX_MAX_KEYS, palloc0(), SET_VARSIZE, and SIGNWORDBITS.

Referenced by BloomFillMetapage().

87 {
88  BloomOptions *opts;
89  int i;
90 
91  opts = (BloomOptions *) palloc0(sizeof(BloomOptions));
92  /* Convert DEFAULT_BLOOM_LENGTH from # of bits to # of words */
94  for (i = 0; i < INDEX_MAX_KEYS; i++)
95  opts->bitSize[i] = DEFAULT_BLOOM_BITS;
96  SET_VARSIZE(opts, sizeof(BloomOptions));
97  return opts;
98 }
#define DEFAULT_BLOOM_BITS
Definition: bloom.h:96
int bitSize[INDEX_MAX_KEYS]
Definition: bloom.h:104
#define DEFAULT_BLOOM_LENGTH
Definition: bloom.h:90
#define SIGNWORDBITS
Definition: bloom.h:85
void * palloc0(Size size)
Definition: mcxt.c:955
#define INDEX_MAX_KEYS
int bloomLength
Definition: bloom.h:103
int i
#define SET_VARSIZE(PTR, len)
Definition: postgres.h:329

◆ myRand()

static int32 myRand ( void  )
static

Definition at line 216 of file blutils.c.

References next.

Referenced by signValue().

217 {
218  /*----------
219  * Compute x = (7^5 * x) mod (2^31 - 1)
220  * without overflowing 31 bits:
221  * (2^31 - 1) = 127773 * (7^5) + 2836
222  * From "Random number generators: good ones are hard to find",
223  * Park and Miller, Communications of the ACM, vol. 31, no. 10,
224  * October 1988, p. 1195.
225  *----------
226  */
227  int32 hi,
228  lo,
229  x;
230 
231  /* Must be in [1, 0x7ffffffe] range at this point. */
232  hi = next / 127773;
233  lo = next % 127773;
234  x = 16807 * lo - 2836 * hi;
235  if (x < 0)
236  x += 0x7fffffff;
237  next = x;
238  /* Transform to [0, 0x7ffffffd] range. */
239  return (x - 1);
240 }
static int32 next
Definition: blutils.c:213
signed int int32
Definition: c.h:346

◆ mySrand()

static void mySrand ( uint32  seed)
static

Definition at line 243 of file blutils.c.

References next.

Referenced by signValue().

244 {
245  next = seed;
246  /* Transform to [1, 0x7ffffffe] range. */
247  next = (next % 0x7ffffffe) + 1;
248 }
static int32 next
Definition: blutils.c:213

◆ PG_FUNCTION_INFO_V1()

PG_FUNCTION_INFO_V1 ( blhandler  )

◆ signValue()

void signValue ( BloomState state,
BloomSignatureWord sign,
Datum  value,
int  attno 
)

Definition at line 254 of file blutils.c.

References BloomOptions::bitSize, BloomOptions::bloomLength, BloomState::collations, DatumGetInt32, FunctionCall1Coll(), BloomState::hashFn, myRand(), mySrand(), BloomState::opts, SETBIT, and SIGNWORDBITS.

Referenced by blgetbitmap(), and BloomFormTuple().

255 {
256  uint32 hashVal;
257  int nBit,
258  j;
259 
260  /*
261  * init generator with "column's" number to get "hashed" seed for new
262  * value. We don't want to map the same numbers from different columns
263  * into the same bits!
264  */
265  mySrand(attno);
266 
267  /*
268  * Init hash sequence to map our value into bits. the same values in
269  * different columns will be mapped into different bits because of step
270  * above
271  */
272  hashVal = DatumGetInt32(FunctionCall1Coll(&state->hashFn[attno], state->collations[attno], value));
273  mySrand(hashVal ^ myRand());
274 
275  for (j = 0; j < state->opts.bitSize[attno]; j++)
276  {
277  /* prevent multiple evaluation in SETBIT macro */
278  nBit = myRand() % (state->opts.bloomLength * SIGNWORDBITS);
279  SETBIT(sign, nBit);
280  }
281 }
#define SETBIT(x, i)
Definition: blutils.c:33
BloomOptions opts
Definition: bloom.h:141
#define DatumGetInt32(X)
Definition: postgres.h:472
FmgrInfo hashFn[INDEX_MAX_KEYS]
Definition: bloom.h:139
static struct @144 value
int bitSize[INDEX_MAX_KEYS]
Definition: bloom.h:104
Oid collations[INDEX_MAX_KEYS]
Definition: bloom.h:140
#define SIGNWORDBITS
Definition: bloom.h:85
char sign
Definition: informix.c:688
unsigned int uint32
Definition: c.h:358
Datum FunctionCall1Coll(FmgrInfo *flinfo, Oid collation, Datum arg1)
Definition: fmgr.c:1130
static int32 myRand(void)
Definition: blutils.c:216
static void mySrand(uint32 seed)
Definition: blutils.c:243
int bloomLength
Definition: bloom.h:103

Variable Documentation

◆ bl_relopt_kind

relopt_kind bl_relopt_kind
static

Definition at line 39 of file blutils.c.

Referenced by _PG_init(), and bloptions().

◆ bl_relopt_tab

relopt_parse_elt bl_relopt_tab[INDEX_MAX_KEYS+1]
static

Definition at line 42 of file blutils.c.

◆ next