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brin_pageops.h File Reference
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Functions

bool brin_doupdate (Relation idxrel, BlockNumber pagesPerRange, BrinRevmap *revmap, BlockNumber heapBlk, Buffer oldbuf, OffsetNumber oldoff, const BrinTuple *origtup, Size origsz, const BrinTuple *newtup, Size newsz, bool samepage)
 
bool brin_can_do_samepage_update (Buffer buffer, Size origsz, Size newsz)
 
OffsetNumber brin_doinsert (Relation idxrel, BlockNumber pagesPerRange, BrinRevmap *revmap, Buffer *buffer, BlockNumber heapBlk, BrinTuple *tup, Size itemsz)
 
void brin_page_init (Page page, uint16 type)
 
void brin_metapage_init (Page page, BlockNumber pagesPerRange, uint16 version)
 
bool brin_start_evacuating_page (Relation idxRel, Buffer buf)
 
void brin_evacuate_page (Relation idxRel, BlockNumber pagesPerRange, BrinRevmap *revmap, Buffer buf)
 
void brin_page_cleanup (Relation idxrel, Buffer buf)
 

Function Documentation

◆ brin_can_do_samepage_update()

bool brin_can_do_samepage_update ( Buffer  buffer,
Size  origsz,
Size  newsz 
)

Definition at line 323 of file brin_pageops.c.

324 {
325  return
326  ((newsz <= origsz) ||
327  PageGetExactFreeSpace(BufferGetPage(buffer)) >= (newsz - origsz));
328 }
static Page BufferGetPage(Buffer buffer)
Definition: bufmgr.h:404
Size PageGetExactFreeSpace(Page page)
Definition: bufpage.c:958

References BufferGetPage(), and PageGetExactFreeSpace().

Referenced by brin_doupdate(), brininsert(), and summarize_range().

◆ brin_doinsert()

OffsetNumber brin_doinsert ( Relation  idxrel,
BlockNumber  pagesPerRange,
BrinRevmap revmap,
Buffer buffer,
BlockNumber  heapBlk,
BrinTuple tup,
Size  itemsz 
)

Definition at line 342 of file brin_pageops.c.

345 {
346  Page page;
347  BlockNumber blk;
348  OffsetNumber off;
349  Size freespace = 0;
350  Buffer revmapbuf;
351  ItemPointerData tid;
352  bool extended;
353 
354  Assert(itemsz == MAXALIGN(itemsz));
355 
356  /* If the item is oversized, don't even bother. */
357  if (itemsz > BrinMaxItemSize)
358  {
359  ereport(ERROR,
360  (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
361  errmsg("index row size %zu exceeds maximum %zu for index \"%s\"",
362  itemsz, BrinMaxItemSize, RelationGetRelationName(idxrel))));
363  return InvalidOffsetNumber; /* keep compiler quiet */
364  }
365 
366  /* Make sure the revmap is long enough to contain the entry we need */
367  brinRevmapExtend(revmap, heapBlk);
368 
369  /*
370  * Acquire lock on buffer supplied by caller, if any. If it doesn't have
371  * enough space, unpin it to obtain a new one below.
372  */
373  if (BufferIsValid(*buffer))
374  {
375  /*
376  * It's possible that another backend (or ourselves!) extended the
377  * revmap over the page we held a pin on, so we cannot assume that
378  * it's still a regular page.
379  */
381  if (br_page_get_freespace(BufferGetPage(*buffer)) < itemsz)
382  {
383  UnlockReleaseBuffer(*buffer);
384  *buffer = InvalidBuffer;
385  }
386  }
387 
388  /*
389  * If we still don't have a usable buffer, have brin_getinsertbuffer
390  * obtain one for us.
391  */
392  if (!BufferIsValid(*buffer))
393  {
394  do
395  *buffer = brin_getinsertbuffer(idxrel, InvalidBuffer, itemsz, &extended);
396  while (!BufferIsValid(*buffer));
397  }
398  else
399  extended = false;
400 
401  /* Now obtain lock on revmap buffer */
402  revmapbuf = brinLockRevmapPageForUpdate(revmap, heapBlk);
403 
404  page = BufferGetPage(*buffer);
405  blk = BufferGetBlockNumber(*buffer);
406 
407  /* Execute the actual insertion */
409  if (extended)
411  off = PageAddItem(page, (Item) tup, itemsz, InvalidOffsetNumber,
412  false, false);
413  if (off == InvalidOffsetNumber)
414  elog(ERROR, "failed to add BRIN tuple to new page");
415  MarkBufferDirty(*buffer);
416 
417  /* needed to update FSM below */
418  if (extended)
419  freespace = br_page_get_freespace(page);
420 
421  ItemPointerSet(&tid, blk, off);
422  brinSetHeapBlockItemptr(revmapbuf, pagesPerRange, heapBlk, tid);
423  MarkBufferDirty(revmapbuf);
424 
425  /* XLOG stuff */
426  if (RelationNeedsWAL(idxrel))
427  {
428  xl_brin_insert xlrec;
429  XLogRecPtr recptr;
430  uint8 info;
431 
432  info = XLOG_BRIN_INSERT | (extended ? XLOG_BRIN_INIT_PAGE : 0);
433  xlrec.heapBlk = heapBlk;
434  xlrec.pagesPerRange = pagesPerRange;
435  xlrec.offnum = off;
436 
437  XLogBeginInsert();
438  XLogRegisterData((char *) &xlrec, SizeOfBrinInsert);
439 
440  XLogRegisterBuffer(0, *buffer, REGBUF_STANDARD | (extended ? REGBUF_WILL_INIT : 0));
441  XLogRegisterBufData(0, (char *) tup, itemsz);
442 
443  XLogRegisterBuffer(1, revmapbuf, 0);
444 
445  recptr = XLogInsert(RM_BRIN_ID, info);
446 
447  PageSetLSN(page, recptr);
448  PageSetLSN(BufferGetPage(revmapbuf), recptr);
449  }
450 
452 
453  /* Tuple is firmly on buffer; we can release our locks */
454  LockBuffer(*buffer, BUFFER_LOCK_UNLOCK);
455  LockBuffer(revmapbuf, BUFFER_LOCK_UNLOCK);
456 
457  BRIN_elog((DEBUG2, "inserted tuple (%u,%u) for range starting at %u",
458  blk, off, heapBlk));
459 
460  if (extended)
461  {
462  RecordPageWithFreeSpace(idxrel, blk, freespace);
463  FreeSpaceMapVacuumRange(idxrel, blk, blk + 1);
464  }
465 
466  return off;
467 }
uint32 BlockNumber
Definition: block.h:31
#define BRIN_elog(args)
Definition: brin_internal.h:85
#define BRIN_PAGETYPE_REGULAR
Definition: brin_page.h:53
#define BrinMaxItemSize
Definition: brin_pageops.c:28
void brin_page_init(Page page, uint16 type)
Definition: brin_pageops.c:475
static Size br_page_get_freespace(Page page)
Definition: brin_pageops.c:916
static Buffer brin_getinsertbuffer(Relation irel, Buffer oldbuf, Size itemsz, bool *extended)
Definition: brin_pageops.c:690
void brinRevmapExtend(BrinRevmap *revmap, BlockNumber heapBlk)
Definition: brin_revmap.c:112
void brinSetHeapBlockItemptr(Buffer buf, BlockNumber pagesPerRange, BlockNumber heapBlk, ItemPointerData tid)
Definition: brin_revmap.c:155
Buffer brinLockRevmapPageForUpdate(BrinRevmap *revmap, BlockNumber heapBlk)
Definition: brin_revmap.c:134
#define SizeOfBrinInsert
Definition: brin_xlog.h:74
#define XLOG_BRIN_INIT_PAGE
Definition: brin_xlog.h:43
#define XLOG_BRIN_INSERT
Definition: brin_xlog.h:32
int Buffer
Definition: buf.h:23
#define InvalidBuffer
Definition: buf.h:25
BlockNumber BufferGetBlockNumber(Buffer buffer)
Definition: bufmgr.c:3667
void UnlockReleaseBuffer(Buffer buffer)
Definition: bufmgr.c:4867
void MarkBufferDirty(Buffer buffer)
Definition: bufmgr.c:2474
void LockBuffer(Buffer buffer, int mode)
Definition: bufmgr.c:5085
#define BUFFER_LOCK_UNLOCK
Definition: bufmgr.h:193
#define BUFFER_LOCK_EXCLUSIVE
Definition: bufmgr.h:195
static bool BufferIsValid(Buffer bufnum)
Definition: bufmgr.h:355
Pointer Page
Definition: bufpage.h:78
static void PageSetLSN(Page page, XLogRecPtr lsn)
Definition: bufpage.h:388
#define PageAddItem(page, item, size, offsetNumber, overwrite, is_heap)
Definition: bufpage.h:468
#define MAXALIGN(LEN)
Definition: c.h:811
#define Assert(condition)
Definition: c.h:858
unsigned char uint8
Definition: c.h:504
size_t Size
Definition: c.h:605
int errcode(int sqlerrcode)
Definition: elog.c:857
int errmsg(const char *fmt,...)
Definition: elog.c:1070
#define DEBUG2
Definition: elog.h:29
#define ERROR
Definition: elog.h:39
#define elog(elevel,...)
Definition: elog.h:224
#define ereport(elevel,...)
Definition: elog.h:149
void FreeSpaceMapVacuumRange(Relation rel, BlockNumber start, BlockNumber end)
Definition: freespace.c:377
void RecordPageWithFreeSpace(Relation rel, BlockNumber heapBlk, Size spaceAvail)
Definition: freespace.c:194
Pointer Item
Definition: item.h:17
static void ItemPointerSet(ItemPointerData *pointer, BlockNumber blockNumber, OffsetNumber offNum)
Definition: itemptr.h:135
#define START_CRIT_SECTION()
Definition: miscadmin.h:149
#define END_CRIT_SECTION()
Definition: miscadmin.h:151
#define InvalidOffsetNumber
Definition: off.h:26
uint16 OffsetNumber
Definition: off.h:24
#define RelationGetRelationName(relation)
Definition: rel.h:539
#define RelationNeedsWAL(relation)
Definition: rel.h:628
OffsetNumber offnum
Definition: brin_xlog.h:71
BlockNumber pagesPerRange
Definition: brin_xlog.h:68
BlockNumber heapBlk
Definition: brin_xlog.h:65
uint64 XLogRecPtr
Definition: xlogdefs.h:21
void XLogRegisterData(char *data, uint32 len)
Definition: xloginsert.c:364
XLogRecPtr XLogInsert(RmgrId rmid, uint8 info)
Definition: xloginsert.c:474
void XLogRegisterBufData(uint8 block_id, char *data, uint32 len)
Definition: xloginsert.c:405
void XLogRegisterBuffer(uint8 block_id, Buffer buffer, uint8 flags)
Definition: xloginsert.c:242
void XLogBeginInsert(void)
Definition: xloginsert.c:149
#define REGBUF_STANDARD
Definition: xloginsert.h:34
#define REGBUF_WILL_INIT
Definition: xloginsert.h:33

References Assert, br_page_get_freespace(), BRIN_elog, brin_getinsertbuffer(), brin_page_init(), BRIN_PAGETYPE_REGULAR, brinLockRevmapPageForUpdate(), BrinMaxItemSize, brinRevmapExtend(), brinSetHeapBlockItemptr(), BUFFER_LOCK_EXCLUSIVE, BUFFER_LOCK_UNLOCK, BufferGetBlockNumber(), BufferGetPage(), BufferIsValid(), DEBUG2, elog, END_CRIT_SECTION, ereport, errcode(), errmsg(), ERROR, FreeSpaceMapVacuumRange(), xl_brin_insert::heapBlk, InvalidBuffer, InvalidOffsetNumber, ItemPointerSet(), LockBuffer(), MarkBufferDirty(), MAXALIGN, xl_brin_insert::offnum, PageAddItem, PageSetLSN(), xl_brin_insert::pagesPerRange, RecordPageWithFreeSpace(), REGBUF_STANDARD, REGBUF_WILL_INIT, RelationGetRelationName, RelationNeedsWAL, SizeOfBrinInsert, START_CRIT_SECTION, UnlockReleaseBuffer(), XLOG_BRIN_INIT_PAGE, XLOG_BRIN_INSERT, XLogBeginInsert(), XLogInsert(), XLogRegisterBufData(), XLogRegisterBuffer(), and XLogRegisterData().

Referenced by _brin_parallel_merge(), brin_fill_empty_ranges(), form_and_insert_tuple(), and summarize_range().

◆ brin_doupdate()

bool brin_doupdate ( Relation  idxrel,
BlockNumber  pagesPerRange,
BrinRevmap revmap,
BlockNumber  heapBlk,
Buffer  oldbuf,
OffsetNumber  oldoff,
const BrinTuple origtup,
Size  origsz,
const BrinTuple newtup,
Size  newsz,
bool  samepage 
)

Definition at line 53 of file brin_pageops.c.

59 {
60  Page oldpage;
61  ItemId oldlp;
62  BrinTuple *oldtup;
63  Size oldsz;
64  Buffer newbuf;
66  bool extended;
67 
68  Assert(newsz == MAXALIGN(newsz));
69 
70  /* If the item is oversized, don't bother. */
71  if (newsz > BrinMaxItemSize)
72  {
73  ereport(ERROR,
74  (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
75  errmsg("index row size %zu exceeds maximum %zu for index \"%s\"",
76  newsz, BrinMaxItemSize, RelationGetRelationName(idxrel))));
77  return false; /* keep compiler quiet */
78  }
79 
80  /* make sure the revmap is long enough to contain the entry we need */
81  brinRevmapExtend(revmap, heapBlk);
82 
83  if (!samepage)
84  {
85  /* need a page on which to put the item */
86  newbuf = brin_getinsertbuffer(idxrel, oldbuf, newsz, &extended);
87  if (!BufferIsValid(newbuf))
88  {
89  Assert(!extended);
90  return false;
91  }
92 
93  /*
94  * Note: it's possible (though unlikely) that the returned newbuf is
95  * the same as oldbuf, if brin_getinsertbuffer determined that the old
96  * buffer does in fact have enough space.
97  */
98  if (newbuf == oldbuf)
99  {
100  Assert(!extended);
101  newbuf = InvalidBuffer;
102  }
103  else
104  newblk = BufferGetBlockNumber(newbuf);
105  }
106  else
107  {
109  newbuf = InvalidBuffer;
110  extended = false;
111  }
112  oldpage = BufferGetPage(oldbuf);
113  oldlp = PageGetItemId(oldpage, oldoff);
114 
115  /*
116  * Check that the old tuple wasn't updated concurrently: it might have
117  * moved someplace else entirely, and for that matter the whole page
118  * might've become a revmap page. Note that in the first two cases
119  * checked here, the "oldlp" we just calculated is garbage; but
120  * PageGetItemId() is simple enough that it was safe to do that
121  * calculation anyway.
122  */
123  if (!BRIN_IS_REGULAR_PAGE(oldpage) ||
124  oldoff > PageGetMaxOffsetNumber(oldpage) ||
125  !ItemIdIsNormal(oldlp))
126  {
128 
129  /*
130  * If this happens, and the new buffer was obtained by extending the
131  * relation, then we need to ensure we don't leave it uninitialized or
132  * forget about it.
133  */
134  if (BufferIsValid(newbuf))
135  {
136  if (extended)
137  brin_initialize_empty_new_buffer(idxrel, newbuf);
138  UnlockReleaseBuffer(newbuf);
139  if (extended)
140  FreeSpaceMapVacuumRange(idxrel, newblk, newblk + 1);
141  }
142  return false;
143  }
144 
145  oldsz = ItemIdGetLength(oldlp);
146  oldtup = (BrinTuple *) PageGetItem(oldpage, oldlp);
147 
148  /*
149  * ... or it might have been updated in place to different contents.
150  */
151  if (!brin_tuples_equal(oldtup, oldsz, origtup, origsz))
152  {
154  if (BufferIsValid(newbuf))
155  {
156  /* As above, initialize and record new page if we got one */
157  if (extended)
158  brin_initialize_empty_new_buffer(idxrel, newbuf);
159  UnlockReleaseBuffer(newbuf);
160  if (extended)
161  FreeSpaceMapVacuumRange(idxrel, newblk, newblk + 1);
162  }
163  return false;
164  }
165 
166  /*
167  * Great, the old tuple is intact. We can proceed with the update.
168  *
169  * If there's enough room in the old page for the new tuple, replace it.
170  *
171  * Note that there might now be enough space on the page even though the
172  * caller told us there isn't, if a concurrent update moved another tuple
173  * elsewhere or replaced a tuple with a smaller one.
174  */
175  if (((BrinPageFlags(oldpage) & BRIN_EVACUATE_PAGE) == 0) &&
176  brin_can_do_samepage_update(oldbuf, origsz, newsz))
177  {
179  if (!PageIndexTupleOverwrite(oldpage, oldoff, (Item) unconstify(BrinTuple *, newtup), newsz))
180  elog(ERROR, "failed to replace BRIN tuple");
181  MarkBufferDirty(oldbuf);
182 
183  /* XLOG stuff */
184  if (RelationNeedsWAL(idxrel))
185  {
187  XLogRecPtr recptr;
189 
190  xlrec.offnum = oldoff;
191 
192  XLogBeginInsert();
193  XLogRegisterData((char *) &xlrec, SizeOfBrinSamepageUpdate);
194 
196  XLogRegisterBufData(0, (char *) unconstify(BrinTuple *, newtup), newsz);
197 
198  recptr = XLogInsert(RM_BRIN_ID, info);
199 
200  PageSetLSN(oldpage, recptr);
201  }
202 
204 
206 
207  if (BufferIsValid(newbuf))
208  {
209  /* As above, initialize and record new page if we got one */
210  if (extended)
211  brin_initialize_empty_new_buffer(idxrel, newbuf);
212  UnlockReleaseBuffer(newbuf);
213  if (extended)
214  FreeSpaceMapVacuumRange(idxrel, newblk, newblk + 1);
215  }
216 
217  return true;
218  }
219  else if (newbuf == InvalidBuffer)
220  {
221  /*
222  * Not enough space, but caller said that there was. Tell them to
223  * start over.
224  */
226  return false;
227  }
228  else
229  {
230  /*
231  * Not enough free space on the oldpage. Put the new tuple on the new
232  * page, and update the revmap.
233  */
234  Page newpage = BufferGetPage(newbuf);
235  Buffer revmapbuf;
236  ItemPointerData newtid;
237  OffsetNumber newoff;
238  Size freespace = 0;
239 
240  revmapbuf = brinLockRevmapPageForUpdate(revmap, heapBlk);
241 
243 
244  /*
245  * We need to initialize the page if it's newly obtained. Note we
246  * will WAL-log the initialization as part of the update, so we don't
247  * need to do that here.
248  */
249  if (extended)
251 
252  PageIndexTupleDeleteNoCompact(oldpage, oldoff);
253  newoff = PageAddItem(newpage, (Item) unconstify(BrinTuple *, newtup), newsz,
254  InvalidOffsetNumber, false, false);
255  if (newoff == InvalidOffsetNumber)
256  elog(ERROR, "failed to add BRIN tuple to new page");
257  MarkBufferDirty(oldbuf);
258  MarkBufferDirty(newbuf);
259 
260  /* needed to update FSM below */
261  if (extended)
262  freespace = br_page_get_freespace(newpage);
263 
264  ItemPointerSet(&newtid, newblk, newoff);
265  brinSetHeapBlockItemptr(revmapbuf, pagesPerRange, heapBlk, newtid);
266  MarkBufferDirty(revmapbuf);
267 
268  /* XLOG stuff */
269  if (RelationNeedsWAL(idxrel))
270  {
271  xl_brin_update xlrec;
272  XLogRecPtr recptr;
273  uint8 info;
274 
275  info = XLOG_BRIN_UPDATE | (extended ? XLOG_BRIN_INIT_PAGE : 0);
276 
277  xlrec.insert.offnum = newoff;
278  xlrec.insert.heapBlk = heapBlk;
279  xlrec.insert.pagesPerRange = pagesPerRange;
280  xlrec.oldOffnum = oldoff;
281 
282  XLogBeginInsert();
283 
284  /* new page */
285  XLogRegisterData((char *) &xlrec, SizeOfBrinUpdate);
286 
287  XLogRegisterBuffer(0, newbuf, REGBUF_STANDARD | (extended ? REGBUF_WILL_INIT : 0));
288  XLogRegisterBufData(0, (char *) unconstify(BrinTuple *, newtup), newsz);
289 
290  /* revmap page */
291  XLogRegisterBuffer(1, revmapbuf, 0);
292 
293  /* old page */
295 
296  recptr = XLogInsert(RM_BRIN_ID, info);
297 
298  PageSetLSN(oldpage, recptr);
299  PageSetLSN(newpage, recptr);
300  PageSetLSN(BufferGetPage(revmapbuf), recptr);
301  }
302 
304 
305  LockBuffer(revmapbuf, BUFFER_LOCK_UNLOCK);
307  UnlockReleaseBuffer(newbuf);
308 
309  if (extended)
310  {
311  RecordPageWithFreeSpace(idxrel, newblk, freespace);
312  FreeSpaceMapVacuumRange(idxrel, newblk, newblk + 1);
313  }
314 
315  return true;
316  }
317 }
#define InvalidBlockNumber
Definition: block.h:33
#define BrinPageFlags(page)
Definition: brin_page.h:46
#define BRIN_EVACUATE_PAGE
Definition: brin_page.h:60
#define BRIN_IS_REGULAR_PAGE(page)
Definition: brin_page.h:57
static void brin_initialize_empty_new_buffer(Relation idxrel, Buffer buffer)
Definition: brin_pageops.c:884
bool brin_can_do_samepage_update(Buffer buffer, Size origsz, Size newsz)
Definition: brin_pageops.c:323
bool brin_tuples_equal(const BrinTuple *a, Size alen, const BrinTuple *b, Size blen)
Definition: brin_tuple.c:465
#define SizeOfBrinUpdate
Definition: brin_xlog.h:95
#define XLOG_BRIN_SAMEPAGE_UPDATE
Definition: brin_xlog.h:34
#define SizeOfBrinSamepageUpdate
Definition: brin_xlog.h:107
#define XLOG_BRIN_UPDATE
Definition: brin_xlog.h:33
bool PageIndexTupleOverwrite(Page page, OffsetNumber offnum, Item newtup, Size newsize)
Definition: bufpage.c:1405
void PageIndexTupleDeleteNoCompact(Page page, OffsetNumber offnum)
Definition: bufpage.c:1295
static Item PageGetItem(Page page, ItemId itemId)
Definition: bufpage.h:351
static ItemId PageGetItemId(Page page, OffsetNumber offsetNumber)
Definition: bufpage.h:240
static OffsetNumber PageGetMaxOffsetNumber(Page page)
Definition: bufpage.h:369
#define unconstify(underlying_type, expr)
Definition: c.h:1245
#define ItemIdGetLength(itemId)
Definition: itemid.h:59
#define ItemIdIsNormal(itemId)
Definition: itemid.h:99
OffsetNumber offnum
Definition: brin_xlog.h:104
OffsetNumber oldOffnum
Definition: brin_xlog.h:90
xl_brin_insert insert
Definition: brin_xlog.h:92

References Assert, br_page_get_freespace(), brin_can_do_samepage_update(), BRIN_EVACUATE_PAGE, brin_getinsertbuffer(), brin_initialize_empty_new_buffer(), BRIN_IS_REGULAR_PAGE, brin_page_init(), BRIN_PAGETYPE_REGULAR, brin_tuples_equal(), brinLockRevmapPageForUpdate(), BrinMaxItemSize, BrinPageFlags, brinRevmapExtend(), brinSetHeapBlockItemptr(), BUFFER_LOCK_EXCLUSIVE, BUFFER_LOCK_UNLOCK, BufferGetBlockNumber(), BufferGetPage(), BufferIsValid(), elog, END_CRIT_SECTION, ereport, errcode(), errmsg(), ERROR, FreeSpaceMapVacuumRange(), xl_brin_insert::heapBlk, xl_brin_update::insert, InvalidBlockNumber, InvalidBuffer, InvalidOffsetNumber, ItemIdGetLength, ItemIdIsNormal, ItemPointerSet(), LockBuffer(), MarkBufferDirty(), MAXALIGN, xl_brin_insert::offnum, xl_brin_samepage_update::offnum, xl_brin_update::oldOffnum, PageAddItem, PageGetItem(), PageGetItemId(), PageGetMaxOffsetNumber(), PageIndexTupleDeleteNoCompact(), PageIndexTupleOverwrite(), PageSetLSN(), xl_brin_insert::pagesPerRange, RecordPageWithFreeSpace(), REGBUF_STANDARD, REGBUF_WILL_INIT, RelationGetRelationName, RelationNeedsWAL, SizeOfBrinSamepageUpdate, SizeOfBrinUpdate, START_CRIT_SECTION, unconstify, UnlockReleaseBuffer(), XLOG_BRIN_INIT_PAGE, XLOG_BRIN_SAMEPAGE_UPDATE, XLOG_BRIN_UPDATE, XLogBeginInsert(), XLogInsert(), XLogRegisterBufData(), XLogRegisterBuffer(), and XLogRegisterData().

Referenced by brin_evacuate_page(), brininsert(), and summarize_range().

◆ brin_evacuate_page()

void brin_evacuate_page ( Relation  idxRel,
BlockNumber  pagesPerRange,
BrinRevmap revmap,
Buffer  buf 
)

Definition at line 564 of file brin_pageops.c.

566 {
567  OffsetNumber off;
568  OffsetNumber maxoff;
569  Page page;
570  BrinTuple *btup = NULL;
571  Size btupsz = 0;
572 
573  page = BufferGetPage(buf);
574 
576 
577  maxoff = PageGetMaxOffsetNumber(page);
578  for (off = FirstOffsetNumber; off <= maxoff; off++)
579  {
580  BrinTuple *tup;
581  Size sz;
582  ItemId lp;
583 
585 
586  lp = PageGetItemId(page, off);
587  if (ItemIdIsUsed(lp))
588  {
589  sz = ItemIdGetLength(lp);
590  tup = (BrinTuple *) PageGetItem(page, lp);
591  tup = brin_copy_tuple(tup, sz, btup, &btupsz);
592 
594 
595  if (!brin_doupdate(idxRel, pagesPerRange, revmap, tup->bt_blkno,
596  buf, off, tup, sz, tup, sz, false))
597  off--; /* retry */
598 
600 
601  /* It's possible that someone extended the revmap over this page */
602  if (!BRIN_IS_REGULAR_PAGE(page))
603  break;
604  }
605  }
606 
608 }
bool brin_doupdate(Relation idxrel, BlockNumber pagesPerRange, BrinRevmap *revmap, BlockNumber heapBlk, Buffer oldbuf, OffsetNumber oldoff, const BrinTuple *origtup, Size origsz, const BrinTuple *newtup, Size newsz, bool samepage)
Definition: brin_pageops.c:53
BrinTuple * brin_copy_tuple(BrinTuple *tuple, Size len, BrinTuple *dest, Size *destsz)
Definition: brin_tuple.c:446
#define BUFFER_LOCK_SHARE
Definition: bufmgr.h:194
#define ItemIdIsUsed(itemId)
Definition: itemid.h:92
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:122
#define FirstOffsetNumber
Definition: off.h:27
static char * buf
Definition: pg_test_fsync.c:73
BlockNumber bt_blkno
Definition: brin_tuple.h:66

References Assert, brin_copy_tuple(), brin_doupdate(), BRIN_EVACUATE_PAGE, BRIN_IS_REGULAR_PAGE, BrinPageFlags, BrinTuple::bt_blkno, buf, BUFFER_LOCK_SHARE, BUFFER_LOCK_UNLOCK, BufferGetPage(), CHECK_FOR_INTERRUPTS, FirstOffsetNumber, ItemIdGetLength, ItemIdIsUsed, LockBuffer(), PageGetItem(), PageGetItemId(), PageGetMaxOffsetNumber(), and UnlockReleaseBuffer().

Referenced by revmap_physical_extend().

◆ brin_metapage_init()

void brin_metapage_init ( Page  page,
BlockNumber  pagesPerRange,
uint16  version 
)

Definition at line 486 of file brin_pageops.c.

487 {
488  BrinMetaPageData *metadata;
489 
491 
492  metadata = (BrinMetaPageData *) PageGetContents(page);
493 
494  metadata->brinMagic = BRIN_META_MAGIC;
495  metadata->brinVersion = version;
496  metadata->pagesPerRange = pagesPerRange;
497 
498  /*
499  * Note we cheat here a little. 0 is not a valid revmap block number
500  * (because it's the metapage buffer), but doing this enables the first
501  * revmap page to be created when the index is.
502  */
503  metadata->lastRevmapPage = 0;
504 
505  /*
506  * Set pd_lower just past the end of the metadata. This is essential,
507  * because without doing so, metadata will be lost if xlog.c compresses
508  * the page.
509  */
510  ((PageHeader) page)->pd_lower =
511  ((char *) metadata + sizeof(BrinMetaPageData)) - (char *) page;
512 }
#define BRIN_META_MAGIC
Definition: brin_page.h:73
#define BRIN_PAGETYPE_META
Definition: brin_page.h:51
PageHeaderData * PageHeader
Definition: bufpage.h:170
static char * PageGetContents(Page page)
Definition: bufpage.h:254
uint32 brinVersion
Definition: brin_page.h:67
uint32 brinMagic
Definition: brin_page.h:66
BlockNumber lastRevmapPage
Definition: brin_page.h:69
BlockNumber pagesPerRange
Definition: brin_page.h:68

References BRIN_META_MAGIC, brin_page_init(), BRIN_PAGETYPE_META, BrinMetaPageData::brinMagic, BrinMetaPageData::brinVersion, BrinMetaPageData::lastRevmapPage, PageGetContents(), and BrinMetaPageData::pagesPerRange.

Referenced by brin_xlog_createidx(), brinbuild(), and brinbuildempty().

◆ brin_page_cleanup()

void brin_page_cleanup ( Relation  idxrel,
Buffer  buf 
)

Definition at line 624 of file brin_pageops.c.

625 {
626  Page page = BufferGetPage(buf);
627 
628  /*
629  * If a page was left uninitialized, initialize it now; also record it in
630  * FSM.
631  *
632  * Somebody else might be extending the relation concurrently. To avoid
633  * re-initializing the page before they can grab the buffer lock, we
634  * acquire the extension lock momentarily. Since they hold the extension
635  * lock from before getting the page and after its been initialized, we're
636  * sure to see their initialization.
637  */
638  if (PageIsNew(page))
639  {
642 
644  if (PageIsNew(page))
645  {
648  return;
649  }
651  }
652 
653  /* Nothing to be done for non-regular index pages */
656  return;
657 
658  /* Measure free space and record it */
660  br_page_get_freespace(page));
661 }
#define BRIN_IS_META_PAGE(page)
Definition: brin_page.h:55
#define BRIN_IS_REVMAP_PAGE(page)
Definition: brin_page.h:56
static bool PageIsNew(Page page)
Definition: bufpage.h:230
void LockRelationForExtension(Relation relation, LOCKMODE lockmode)
Definition: lmgr.c:430
void UnlockRelationForExtension(Relation relation, LOCKMODE lockmode)
Definition: lmgr.c:480
#define ShareLock
Definition: lockdefs.h:40

References br_page_get_freespace(), brin_initialize_empty_new_buffer(), BRIN_IS_META_PAGE, BRIN_IS_REVMAP_PAGE, buf, BUFFER_LOCK_EXCLUSIVE, BUFFER_LOCK_UNLOCK, BufferGetBlockNumber(), BufferGetPage(), LockBuffer(), LockRelationForExtension(), PageIsNew(), RecordPageWithFreeSpace(), ShareLock, and UnlockRelationForExtension().

Referenced by brin_vacuum_scan().

◆ brin_page_init()

void brin_page_init ( Page  page,
uint16  type 
)

Definition at line 475 of file brin_pageops.c.

476 {
477  PageInit(page, BLCKSZ, sizeof(BrinSpecialSpace));
478 
479  BrinPageType(page) = type;
480 }
#define BrinPageType(page)
Definition: brin_page.h:42
void PageInit(Page page, Size pageSize, Size specialSize)
Definition: bufpage.c:42
const char * type

References BrinPageType, PageInit(), and type.

Referenced by brin_doinsert(), brin_doupdate(), brin_initialize_empty_new_buffer(), brin_metapage_init(), brin_xlog_insert_update(), brin_xlog_revmap_extend(), and revmap_physical_extend().

◆ brin_start_evacuating_page()

bool brin_start_evacuating_page ( Relation  idxRel,
Buffer  buf 
)

Definition at line 524 of file brin_pageops.c.

525 {
526  OffsetNumber off;
527  OffsetNumber maxoff;
528  Page page;
529 
530  page = BufferGetPage(buf);
531 
532  if (PageIsNew(page))
533  return false;
534 
535  maxoff = PageGetMaxOffsetNumber(page);
536  for (off = FirstOffsetNumber; off <= maxoff; off++)
537  {
538  ItemId lp;
539 
540  lp = PageGetItemId(page, off);
541  if (ItemIdIsUsed(lp))
542  {
543  /*
544  * Prevent other backends from adding more stuff to this page:
545  * BRIN_EVACUATE_PAGE informs br_page_get_freespace that this page
546  * can no longer be used to add new tuples. Note that this flag
547  * is not WAL-logged, except accidentally.
548  */
550  MarkBufferDirtyHint(buf, true);
551 
552  return true;
553  }
554  }
555  return false;
556 }
void MarkBufferDirtyHint(Buffer buffer, bool buffer_std)
Definition: bufmgr.c:4914

References BRIN_EVACUATE_PAGE, BrinPageFlags, buf, BufferGetPage(), FirstOffsetNumber, ItemIdIsUsed, MarkBufferDirtyHint(), PageGetItemId(), PageGetMaxOffsetNumber(), and PageIsNew().

Referenced by revmap_physical_extend().