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Modify BufferGetPage() to prepare for "snapshot too old" feature

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This patch is a no-op patch which is intended to reduce the chances
of failures of omission once the functional part of the "snapshot
too old" patch goes in.  It adds parameters for snapshot, relation,
and an enum to specify whether the snapshot age check needs to be
done for the page at this point.  This initial patch passes NULL
for the first two new parameters and BGP_NO_SNAPSHOT_TEST for the
third.  The follow-on patch will change the places where the test
needs to be made.
This commit is contained in:
Kevin Grittner
2016-04-08 14:30:10 -05:00
parent 689f9a0588
commit 8b65cf4c5e
65 changed files with 735 additions and 522 deletions
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68
src/backend/access/gin/ginbtree.c
View File

@ -36,7 +36,7 @@ ginTraverseLock(Buffer buffer, bool searchMode)
int access = GIN_SHARE;
LockBuffer(buffer, GIN_SHARE);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (GinPageIsLeaf(page))
{
if (searchMode == FALSE)
@ -89,7 +89,7 @@ ginFindLeafPage(GinBtree btree, bool searchMode)
stack->off = InvalidOffsetNumber;
page = BufferGetPage(stack->buffer);
page = BufferGetPage(stack->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
access = ginTraverseLock(stack->buffer, searchMode);
@ -115,7 +115,8 @@ ginFindLeafPage(GinBtree btree, bool searchMode)
stack->buffer = ginStepRight(stack->buffer, btree->index, access);
stack->blkno = rightlink;
page = BufferGetPage(stack->buffer);
page = BufferGetPage(stack->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
if (!searchMode && GinPageIsIncompleteSplit(page))
ginFinishSplit(btree, stack, false, NULL);
@ -161,7 +162,7 @@ Buffer
ginStepRight(Buffer buffer, Relation index, int lockmode)
{
Buffer nextbuffer;
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
bool isLeaf = GinPageIsLeaf(page);
bool isData = GinPageIsData(page);
BlockNumber blkno = GinPageGetOpaque(page)->rightlink;
@ -171,7 +172,7 @@ ginStepRight(Buffer buffer, Relation index, int lockmode)
UnlockReleaseBuffer(buffer);
/* Sanity check that the page we stepped to is of similar kind. */
page = BufferGetPage(nextbuffer);
page = BufferGetPage(nextbuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (isLeaf != GinPageIsLeaf(page) || isData != GinPageIsData(page))
elog(ERROR, "right sibling of GIN page is of different type");
@ -243,7 +244,7 @@ ginFindParents(GinBtree btree, GinBtreeStack *stack)
for (;;)
{
LockBuffer(buffer, GIN_EXCLUSIVE);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (GinPageIsLeaf(page))
elog(ERROR, "Lost path");
@ -274,7 +275,7 @@ ginFindParents(GinBtree btree, GinBtreeStack *stack)
break;
}
buffer = ginStepRight(buffer, btree->index, GIN_EXCLUSIVE);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
/* finish any incomplete splits, as above */
if (GinPageIsIncompleteSplit(page))
@ -325,7 +326,8 @@ ginPlaceToPage(GinBtree btree, GinBtreeStack *stack,
void *insertdata, BlockNumber updateblkno,
Buffer childbuf, GinStatsData *buildStats)
{
Page page = BufferGetPage(stack->buffer);
Page page = BufferGetPage(stack->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
GinPlaceToPageRC rc;
uint16 xlflags = 0;
Page childpage = NULL;
@ -344,7 +346,7 @@ ginPlaceToPage(GinBtree btree, GinBtreeStack *stack,
{
Assert(BufferIsValid(childbuf));
Assert(updateblkno != InvalidBlockNumber);
childpage = BufferGetPage(childbuf);
childpage = BufferGetPage(childbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
}
/*
@ -456,7 +458,8 @@ ginPlaceToPage(GinBtree btree, GinBtreeStack *stack,
data.flags = xlflags;
if (childbuf != InvalidBuffer)
{
Page childpage = BufferGetPage(childbuf);
Page childpage = BufferGetPage(childbuf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
GinPageGetOpaque(childpage)->flags &= ~GIN_INCOMPLETE_SPLIT;
@ -538,14 +541,21 @@ ginPlaceToPage(GinBtree btree, GinBtreeStack *stack,
if (stack->parent == NULL)
{
MarkBufferDirty(lbuffer);
memcpy(BufferGetPage(stack->buffer), newrootpg, BLCKSZ);
memcpy(BufferGetPage(lbuffer), newlpage, BLCKSZ);
memcpy(BufferGetPage(rbuffer), newrpage, BLCKSZ);
memcpy(BufferGetPage(stack->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST),
newrootpg, BLCKSZ);
memcpy(BufferGetPage(lbuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST),
newlpage, BLCKSZ);
memcpy(BufferGetPage(rbuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST),
newrpage, BLCKSZ);
}
else
{
memcpy(BufferGetPage(stack->buffer), newlpage, BLCKSZ);
memcpy(BufferGetPage(rbuffer), newrpage, BLCKSZ);
memcpy(BufferGetPage(stack->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST),
newlpage, BLCKSZ);
memcpy(BufferGetPage(rbuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST),
newrpage, BLCKSZ);
}
/* write WAL record */
@ -577,10 +587,16 @@ ginPlaceToPage(GinBtree btree, GinBtreeStack *stack,
XLogRegisterData((char *) &data, sizeof(ginxlogSplit));
recptr = XLogInsert(RM_GIN_ID, XLOG_GIN_SPLIT);
PageSetLSN(BufferGetPage(stack->buffer), recptr);
PageSetLSN(BufferGetPage(rbuffer), recptr);
PageSetLSN(BufferGetPage(stack->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST),
recptr);
PageSetLSN(BufferGetPage(rbuffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST),
recptr);
if (stack->parent == NULL)
PageSetLSN(BufferGetPage(lbuffer), recptr);
PageSetLSN(BufferGetPage(lbuffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST),
recptr);
if (BufferIsValid(childbuf))
PageSetLSN(childpage, recptr);
}
@ -662,11 +678,12 @@ ginFinishSplit(GinBtree btree, GinBtreeStack *stack, bool freestack,
* page that has no downlink in the parent, and splitting it further
* would fail.
*/
if (GinPageIsIncompleteSplit(BufferGetPage(parent->buffer)))
if (GinPageIsIncompleteSplit(BufferGetPage(parent->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST)))
ginFinishSplit(btree, parent, false, buildStats);
/* move right if it's needed */
page = BufferGetPage(parent->buffer);
page = BufferGetPage(parent->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
while ((parent->off = btree->findChildPtr(btree, page, stack->blkno, parent->off)) == InvalidOffsetNumber)
{
if (GinPageRightMost(page))
@ -684,15 +701,17 @@ ginFinishSplit(GinBtree btree, GinBtreeStack *stack, bool freestack,
parent->buffer = ginStepRight(parent->buffer, btree->index, GIN_EXCLUSIVE);
parent->blkno = BufferGetBlockNumber(parent->buffer);
page = BufferGetPage(parent->buffer);
page = BufferGetPage(parent->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (GinPageIsIncompleteSplit(BufferGetPage(parent->buffer)))
if (GinPageIsIncompleteSplit(BufferGetPage(parent->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST)))
ginFinishSplit(btree, parent, false, buildStats);
}
/* insert the downlink */
insertdata = btree->prepareDownlink(btree, stack->buffer);
updateblkno = GinPageGetOpaque(BufferGetPage(stack->buffer))->rightlink;
updateblkno = GinPageGetOpaque(BufferGetPage(stack->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST))->rightlink;
done = ginPlaceToPage(btree, parent,
insertdata, updateblkno,
stack->buffer, buildStats);
@ -742,7 +761,8 @@ ginInsertValue(GinBtree btree, GinBtreeStack *stack, void *insertdata,
bool done;
/* If the leaf page was incompletely split, finish the split first */
if (GinPageIsIncompleteSplit(BufferGetPage(stack->buffer)))
if (GinPageIsIncompleteSplit(BufferGetPage(stack->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST)))
ginFinishSplit(btree, stack, false, buildStats);
done = ginPlaceToPage(btree, stack,

18
src/backend/access/gin/gindatapage.c
View File

@ -246,7 +246,7 @@ dataLocateItem(GinBtree btree, GinBtreeStack *stack)
maxoff;
PostingItem *pitem = NULL;
int result;
Page page = BufferGetPage(stack->buffer);
Page page = BufferGetPage(stack->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Assert(!GinPageIsLeaf(page));
Assert(GinPageIsData(page));
@ -432,7 +432,7 @@ dataPlaceToPageLeaf(GinBtree btree, Buffer buf, GinBtreeStack *stack,
GinBtreeDataLeafInsertData *items = insertdata;
ItemPointer newItems = &items->items[items->curitem];
int maxitems = items->nitem - items->curitem;
Page page = BufferGetPage(buf);
Page page = BufferGetPage(buf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
int i;
ItemPointerData rbound;
ItemPointerData lbound;
@ -714,7 +714,7 @@ dataPlaceToPageLeaf(GinBtree btree, Buffer buf, GinBtreeStack *stack,
void
ginVacuumPostingTreeLeaf(Relation indexrel, Buffer buffer, GinVacuumState *gvs)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
disassembledLeaf *leaf;
bool removedsomething = false;
dlist_iter iter;
@ -953,7 +953,7 @@ registerLeafRecompressWALData(Buffer buf, disassembledLeaf *leaf)
static void
dataPlaceToPageLeafRecompress(Buffer buf, disassembledLeaf *leaf)
{
Page page = BufferGetPage(buf);
Page page = BufferGetPage(buf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
char *ptr;
int newsize;
bool modified = false;
@ -1091,7 +1091,7 @@ dataPlaceToPageInternal(GinBtree btree, Buffer buf, GinBtreeStack *stack,
void *insertdata, BlockNumber updateblkno,
Page *newlpage, Page *newrpage)
{
Page page = BufferGetPage(buf);
Page page = BufferGetPage(buf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
OffsetNumber off = stack->off;
PostingItem *pitem;
@ -1141,7 +1141,7 @@ dataPlaceToPage(GinBtree btree, Buffer buf, GinBtreeStack *stack,
void *insertdata, BlockNumber updateblkno,
Page *newlpage, Page *newrpage)
{
Page page = BufferGetPage(buf);
Page page = BufferGetPage(buf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Assert(GinPageIsData(page));
@ -1164,7 +1164,7 @@ dataSplitPageInternal(GinBtree btree, Buffer origbuf,
void *insertdata, BlockNumber updateblkno,
Page *newlpage, Page *newrpage)
{
Page oldpage = BufferGetPage(origbuf);
Page oldpage = BufferGetPage(origbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
OffsetNumber off = stack->off;
int nitems = GinPageGetOpaque(oldpage)->maxoff;
int nleftitems;
@ -1242,7 +1242,7 @@ static void *
dataPrepareDownlink(GinBtree btree, Buffer lbuf)
{
PostingItem *pitem = palloc(sizeof(PostingItem));
Page lpage = BufferGetPage(lbuf);
Page lpage = BufferGetPage(lbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
PostingItemSetBlockNumber(pitem, BufferGetBlockNumber(lbuf));
pitem->key = *GinDataPageGetRightBound(lpage);
@ -1726,7 +1726,7 @@ createPostingTree(Relation index, ItemPointerData *items, uint32 nitems,
* All set. Get a new physical page, and copy the in-memory page to it.
*/
buffer = GinNewBuffer(index);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
blkno = BufferGetBlockNumber(buffer);
START_CRIT_SECTION();

18
src/backend/access/gin/ginentrypage.c
View File

@ -274,7 +274,8 @@ entryLocateEntry(GinBtree btree, GinBtreeStack *stack)
maxoff;
IndexTuple itup = NULL;
int result;
Page page = BufferGetPage(stack->buffer);
Page page = BufferGetPage(stack->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
Assert(!GinPageIsLeaf(page));
Assert(!GinPageIsData(page));
@ -345,7 +346,8 @@ entryLocateEntry(GinBtree btree, GinBtreeStack *stack)
static bool
entryLocateLeafEntry(GinBtree btree, GinBtreeStack *stack)
{
Page page = BufferGetPage(stack->buffer);
Page page = BufferGetPage(stack->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
OffsetNumber low,
high;
@ -461,7 +463,7 @@ entryIsEnoughSpace(GinBtree btree, Buffer buf, OffsetNumber off,
{
Size releasedsz = 0;
Size addedsz;
Page page = BufferGetPage(buf);
Page page = BufferGetPage(buf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Assert(insertData->entry);
Assert(!GinPageIsData(page));
@ -525,7 +527,7 @@ entryPlaceToPage(GinBtree btree, Buffer buf, GinBtreeStack *stack,
Page *newlpage, Page *newrpage)
{
GinBtreeEntryInsertData *insertData = insertPayload;
Page page = BufferGetPage(buf);
Page page = BufferGetPage(buf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
OffsetNumber off = stack->off;
OffsetNumber placed;
@ -592,8 +594,10 @@ entrySplitPage(GinBtree btree, Buffer origbuf,
char *ptr;
IndexTuple itup;
Page page;
Page lpage = PageGetTempPageCopy(BufferGetPage(origbuf));
Page rpage = PageGetTempPageCopy(BufferGetPage(origbuf));
Page lpage = PageGetTempPageCopy(BufferGetPage(origbuf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST));
Page rpage = PageGetTempPageCopy(BufferGetPage(origbuf, NULL, NULL,
BGP_NO_SNAPSHOT_TEST));
Size pageSize = PageGetPageSize(lpage);
char tupstore[2 * BLCKSZ];
@ -674,7 +678,7 @@ static void *
entryPrepareDownlink(GinBtree btree, Buffer lbuf)
{
GinBtreeEntryInsertData *insertData;
Page lpage = BufferGetPage(lbuf);
Page lpage = BufferGetPage(lbuf, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
BlockNumber lblkno = BufferGetBlockNumber(lbuf);
IndexTuple itup;

22
src/backend/access/gin/ginfast.c
View File

@ -53,7 +53,7 @@ static int32
writeListPage(Relation index, Buffer buffer,
IndexTuple *tuples, int32 ntuples, BlockNumber rightlink)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
int32 i,
freesize,
size = 0;
@ -239,7 +239,7 @@ ginHeapTupleFastInsert(GinState *ginstate, GinTupleCollector *collector)
data.newRightlink = data.prevTail = InvalidBlockNumber;
metabuffer = ReadBuffer(index, GIN_METAPAGE_BLKNO);
metapage = BufferGetPage(metabuffer);
metapage = BufferGetPage(metabuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (collector->sumsize + collector->ntuples * sizeof(ItemIdData) > GinListPageSize)
{
@ -310,7 +310,7 @@ ginHeapTupleFastInsert(GinState *ginstate, GinTupleCollector *collector)
buffer = ReadBuffer(index, metadata->tail);
LockBuffer(buffer, GIN_EXCLUSIVE);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Assert(GinPageGetOpaque(page)->rightlink == InvalidBlockNumber);
@ -344,7 +344,7 @@ ginHeapTupleFastInsert(GinState *ginstate, GinTupleCollector *collector)
buffer = ReadBuffer(index, metadata->tail);
LockBuffer(buffer, GIN_EXCLUSIVE);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
off = (PageIsEmpty(page)) ? FirstOffsetNumber :
OffsetNumberNext(PageGetMaxOffsetNumber(page));
@ -514,7 +514,7 @@ shiftList(Relation index, Buffer metabuffer, BlockNumber newHead,
GinMetaPageData *metadata;
BlockNumber blknoToDelete;
metapage = BufferGetPage(metabuffer);
metapage = BufferGetPage(metabuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
metadata = GinPageGetMeta(metapage);
blknoToDelete = metadata->head;
@ -533,7 +533,7 @@ shiftList(Relation index, Buffer metabuffer, BlockNumber newHead,
freespace[data.ndeleted] = blknoToDelete;
buffers[data.ndeleted] = ReadBuffer(index, blknoToDelete);
LockBuffer(buffers[data.ndeleted], GIN_EXCLUSIVE);
page = BufferGetPage(buffers[data.ndeleted]);
page = BufferGetPage(buffers[data.ndeleted], NULL, NULL, BGP_NO_SNAPSHOT_TEST);
data.ndeleted++;
@ -582,7 +582,7 @@ shiftList(Relation index, Buffer metabuffer, BlockNumber newHead,
for (i = 0; i < data.ndeleted; i++)
{
page = BufferGetPage(buffers[i]);
page = BufferGetPage(buffers[i], NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinPageGetOpaque(page)->flags = GIN_DELETED;
MarkBufferDirty(buffers[i]);
}
@ -606,7 +606,7 @@ shiftList(Relation index, Buffer metabuffer, BlockNumber newHead,
for (i = 0; i < data.ndeleted; i++)
{
page = BufferGetPage(buffers[i]);
page = BufferGetPage(buffers[i], NULL, NULL, BGP_NO_SNAPSHOT_TEST);
PageSetLSN(page, recptr);
}
}
@ -760,7 +760,7 @@ ginInsertCleanup(GinState *ginstate,
metabuffer = ReadBuffer(index, GIN_METAPAGE_BLKNO);
LockBuffer(metabuffer, GIN_SHARE);
metapage = BufferGetPage(metabuffer);
metapage = BufferGetPage(metabuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
metadata = GinPageGetMeta(metapage);
if (metadata->head == InvalidBlockNumber)
@ -776,7 +776,7 @@ ginInsertCleanup(GinState *ginstate,
blkno = metadata->head;
buffer = ReadBuffer(index, blkno);
LockBuffer(buffer, GIN_SHARE);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
LockBuffer(metabuffer, GIN_UNLOCK);
@ -943,7 +943,7 @@ ginInsertCleanup(GinState *ginstate,
vacuum_delay_point();
buffer = ReadBuffer(index, blkno);
LockBuffer(buffer, GIN_SHARE);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
}
ReleaseBuffer(metabuffer);

58
src/backend/access/gin/ginget.c
View File

@ -19,6 +19,7 @@
#include "miscadmin.h"
#include "utils/datum.h"
#include "utils/memutils.h"
#include "utils/rel.h"
/* GUC parameter */
int GinFuzzySearchLimit = 0;
@ -39,7 +40,8 @@ typedef struct pendingPosition
static bool
moveRightIfItNeeded(GinBtreeData *btree, GinBtreeStack *stack)
{
Page page = BufferGetPage(stack->buffer);
Page page = BufferGetPage(stack->buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
if (stack->off > PageGetMaxOffsetNumber(page))
{
@ -63,7 +65,7 @@ moveRightIfItNeeded(GinBtreeData *btree, GinBtreeStack *stack)
*/
static void
scanPostingTree(Relation index, GinScanEntry scanEntry,
BlockNumber rootPostingTree)
BlockNumber rootPostingTree, Snapshot snapshot)
{
GinBtreeData btree;
GinBtreeStack *stack;
@ -82,7 +84,7 @@ scanPostingTree(Relation index, GinScanEntry scanEntry,
*/
for (;;)
{
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if ((GinPageGetOpaque(page)->flags & GIN_DELETED) == 0)
{
int n = GinDataLeafPageGetItemsToTbm(page, scanEntry->matchBitmap);
@ -114,7 +116,7 @@ scanPostingTree(Relation index, GinScanEntry scanEntry,
*/
static bool
collectMatchBitmap(GinBtreeData *btree, GinBtreeStack *stack,
GinScanEntry scanEntry)
GinScanEntry scanEntry, Snapshot snapshot)
{
OffsetNumber attnum;
Form_pg_attribute attr;
@ -144,7 +146,7 @@ collectMatchBitmap(GinBtreeData *btree, GinBtreeStack *stack,
if (moveRightIfItNeeded(btree, stack) == false)
return true;
page = BufferGetPage(stack->buffer);
page = BufferGetPage(stack->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, stack->off));
/*
@ -224,14 +226,14 @@ collectMatchBitmap(GinBtreeData *btree, GinBtreeStack *stack,
LockBuffer(stack->buffer, GIN_UNLOCK);
/* Collect all the TIDs in this entry's posting tree */
scanPostingTree(btree->index, scanEntry, rootPostingTree);
scanPostingTree(btree->index, scanEntry, rootPostingTree, snapshot);
/*
* We lock again the entry page and while it was unlocked insert
* might have occurred, so we need to re-find our position.
*/
LockBuffer(stack->buffer, GIN_SHARE);
page = BufferGetPage(stack->buffer);
page = BufferGetPage(stack->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (!GinPageIsLeaf(page))
{
/*
@ -251,7 +253,7 @@ collectMatchBitmap(GinBtreeData *btree, GinBtreeStack *stack,
if (moveRightIfItNeeded(btree, stack) == false)
elog(ERROR, "lost saved point in index"); /* must not happen !!! */
page = BufferGetPage(stack->buffer);
page = BufferGetPage(stack->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, stack->off));
if (gintuple_get_attrnum(btree->ginstate, itup) != attnum)
@ -291,7 +293,7 @@ collectMatchBitmap(GinBtreeData *btree, GinBtreeStack *stack,
* Start* functions setup beginning state of searches: finds correct buffer and pins it.
*/
static void
startScanEntry(GinState *ginstate, GinScanEntry entry)
startScanEntry(GinState *ginstate, GinScanEntry entry, Snapshot snapshot)
{
GinBtreeData btreeEntry;
GinBtreeStack *stackEntry;
@ -319,7 +321,7 @@ restartScanEntry:
entry->queryKey, entry->queryCategory,
ginstate);
stackEntry = ginFindLeafPage(&btreeEntry, true);
page = BufferGetPage(stackEntry->buffer);
page = BufferGetPage(stackEntry->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
needUnlock = TRUE;
entry->isFinished = TRUE;
@ -335,7 +337,7 @@ restartScanEntry:
* for the entry type.
*/
btreeEntry.findItem(&btreeEntry, stackEntry);
if (collectMatchBitmap(&btreeEntry, stackEntry, entry) == false)
if (!collectMatchBitmap(&btreeEntry, stackEntry, entry, snapshot))
{
/*
* GIN tree was seriously restructured, so we will cleanup all
@ -393,7 +395,7 @@ restartScanEntry:
*/
IncrBufferRefCount(entry->buffer);
page = BufferGetPage(entry->buffer);
page = BufferGetPage(entry->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
/*
* Load the first page into memory.
@ -535,7 +537,7 @@ startScan(IndexScanDesc scan)
uint32 i;
for (i = 0; i < so->totalentries; i++)
startScanEntry(ginstate, so->entries[i]);
startScanEntry(ginstate, so->entries[i], scan->xs_snapshot);
if (GinFuzzySearchLimit > 0)
{
@ -580,7 +582,8 @@ startScan(IndexScanDesc scan)
* keep it pinned to prevent interference with vacuum.
*/
static void
entryLoadMoreItems(GinState *ginstate, GinScanEntry entry, ItemPointerData advancePast)
entryLoadMoreItems(GinState *ginstate, GinScanEntry entry,
ItemPointerData advancePast, Snapshot snapshot)
{
Page page;
int i;
@ -638,7 +641,7 @@ entryLoadMoreItems(GinState *ginstate, GinScanEntry entry, ItemPointerData advan
GinItemPointerGetOffsetNumber(&advancePast),
!stepright);
page = BufferGetPage(entry->buffer);
page = BufferGetPage(entry->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
for (;;)
{
entry->offset = InvalidOffsetNumber;
@ -670,7 +673,7 @@ entryLoadMoreItems(GinState *ginstate, GinScanEntry entry, ItemPointerData advan
entry->buffer = ginStepRight(entry->buffer,
ginstate->index,
GIN_SHARE);
page = BufferGetPage(entry->buffer);
page = BufferGetPage(entry->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
}
stepright = true;
@ -734,7 +737,7 @@ entryLoadMoreItems(GinState *ginstate, GinScanEntry entry, ItemPointerData advan
*/
static void
entryGetItem(GinState *ginstate, GinScanEntry entry,
ItemPointerData advancePast)
ItemPointerData advancePast, Snapshot snapshot)
{
Assert(!entry->isFinished);
@ -857,7 +860,7 @@ entryGetItem(GinState *ginstate, GinScanEntry entry,
/* If we've processed the current batch, load more items */
while (entry->offset >= entry->nlist)
{
entryLoadMoreItems(ginstate, entry, advancePast);
entryLoadMoreItems(ginstate, entry, advancePast, snapshot);
if (entry->isFinished)
{
@ -896,7 +899,7 @@ entryGetItem(GinState *ginstate, GinScanEntry entry,
*/
static void
keyGetItem(GinState *ginstate, MemoryContext tempCtx, GinScanKey key,
ItemPointerData advancePast)
ItemPointerData advancePast, Snapshot snapshot)
{
ItemPointerData minItem;
ItemPointerData curPageLossy;
@ -943,7 +946,7 @@ keyGetItem(GinState *ginstate, MemoryContext tempCtx, GinScanKey key,
*/
if (ginCompareItemPointers(&entry->curItem, &advancePast) <= 0)
{
entryGetItem(ginstate, entry, advancePast);
entryGetItem(ginstate, entry, advancePast, snapshot);
if (entry->isFinished)
continue;
}
@ -1001,7 +1004,7 @@ keyGetItem(GinState *ginstate, MemoryContext tempCtx, GinScanKey key,
if (ginCompareItemPointers(&entry->curItem, &advancePast) <= 0)
{
entryGetItem(ginstate, entry, advancePast);
entryGetItem(ginstate, entry, advancePast, snapshot);
if (entry->isFinished)
continue;
}
@ -1210,7 +1213,8 @@ scanGetItem(IndexScanDesc scan, ItemPointerData advancePast,
GinScanKey key = so->keys + i;
/* Fetch the next item for this key that is > advancePast. */
keyGetItem(&so->ginstate, so->tempCtx, key, advancePast);
keyGetItem(&so->ginstate, so->tempCtx, key, advancePast,
scan->xs_snapshot);
if (key->isFinished)
return false;
@ -1331,7 +1335,8 @@ scanGetCandidate(IndexScanDesc scan, pendingPosition *pos)
ItemPointerSetInvalid(&pos->item);
for (;;)
{
page = BufferGetPage(pos->pendingBuffer);
page = BufferGetPage(pos->pendingBuffer, NULL,
NULL, BGP_NO_SNAPSHOT_TEST);
maxoff = PageGetMaxOffsetNumber(page);
if (pos->firstOffset > maxoff)
@ -1511,7 +1516,8 @@ collectMatchesForHeapRow(IndexScanDesc scan, pendingPosition *pos)
memset(datumExtracted + pos->firstOffset - 1, 0,
sizeof(bool) * (pos->lastOffset - pos->firstOffset));
page = BufferGetPage(pos->pendingBuffer);
page = BufferGetPage(pos->pendingBuffer, NULL,
NULL, BGP_NO_SNAPSHOT_TEST);
for (i = 0; i < so->nkeys; i++)
{
@ -1698,12 +1704,14 @@ scanPendingInsert(IndexScanDesc scan, TIDBitmap *tbm, int64 *ntids)
int i;
pendingPosition pos;
Buffer metabuffer = ReadBuffer(scan->indexRelation, GIN_METAPAGE_BLKNO);
Page page;
BlockNumber blkno;
*ntids = 0;
LockBuffer(metabuffer, GIN_SHARE);
blkno = GinPageGetMeta(BufferGetPage(metabuffer))->head;
page = BufferGetPage(metabuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
blkno = GinPageGetMeta(page)->head;
/*
* fetch head of list before unlocking metapage. head page must be pinned

6
src/backend/access/gin/gininsert.c
View File

@ -193,7 +193,7 @@ ginEntryInsert(GinState *ginstate,
ginPrepareEntryScan(&btree, attnum, key, category, ginstate);
stack = ginFindLeafPage(&btree, false);
page = BufferGetPage(stack->buffer);
page = BufferGetPage(stack->buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (btree.findItem(&btree, stack))
{
@ -352,10 +352,10 @@ ginbuild(Relation heap, Relation index, IndexInfo *indexInfo)
recptr = XLogInsert(RM_GIN_ID, XLOG_GIN_CREATE_INDEX);
page = BufferGetPage(RootBuffer);
page = BufferGetPage(RootBuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
PageSetLSN(page, recptr);
page = BufferGetPage(MetaBuffer);
page = BufferGetPage(MetaBuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
PageSetLSN(page, recptr);
}

12
src/backend/access/gin/ginutil.c
View File

@ -273,7 +273,8 @@ GinNewBuffer(Relation index)
*/
if (ConditionalLockBuffer(buffer))
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
if (PageIsNew(page))
return buffer; /* OK to use, if never initialized */
@ -318,14 +319,15 @@ GinInitPage(Page page, uint32 f, Size pageSize)
void
GinInitBuffer(Buffer b, uint32 f)
{
GinInitPage(BufferGetPage(b), f, BufferGetPageSize(b));
GinInitPage(BufferGetPage(b, NULL, NULL, BGP_NO_SNAPSHOT_TEST),
f, BufferGetPageSize(b));
}
void
GinInitMetabuffer(Buffer b)
{
GinMetaPageData *metadata;
Page page = BufferGetPage(b);
Page page = BufferGetPage(b, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinInitPage(page, GIN_META, BufferGetPageSize(b));
@ -605,7 +607,7 @@ ginGetStats(Relation index, GinStatsData *stats)
metabuffer = ReadBuffer(index, GIN_METAPAGE_BLKNO);
LockBuffer(metabuffer, GIN_SHARE);
metapage = BufferGetPage(metabuffer);
metapage = BufferGetPage(metabuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
metadata = GinPageGetMeta(metapage);
stats->nPendingPages = metadata->nPendingPages;
@ -632,7 +634,7 @@ ginUpdateStats(Relation index, const GinStatsData *stats)
metabuffer = ReadBuffer(index, GIN_METAPAGE_BLKNO);
LockBuffer(metabuffer, GIN_EXCLUSIVE);
metapage = BufferGetPage(metabuffer);
metapage = BufferGetPage(metabuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
metadata = GinPageGetMeta(metapage);
START_CRIT_SECTION();

29
src/backend/access/gin/ginvacuum.c
View File

@ -87,7 +87,8 @@ ginVacuumItemPointers(GinVacuumState *gvs, ItemPointerData *items,
static void
xlogVacuumPage(Relation index, Buffer buffer)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
XLogRecPtr recptr;
/* This is only used for entry tree leaf pages. */
@ -118,7 +119,7 @@ ginVacuumPostingTreeLeaves(GinVacuumState *gvs, BlockNumber blkno, bool isRoot,
buffer = ReadBufferExtended(gvs->index, MAIN_FORKNUM, blkno,
RBM_NORMAL, gvs->strategy);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
/*
* We should be sure that we don't concurrent with inserts, insert process
@ -212,14 +213,14 @@ ginDeletePage(GinVacuumState *gvs, BlockNumber deleteBlkno, BlockNumber leftBlkn
START_CRIT_SECTION();
/* Unlink the page by changing left sibling's rightlink */
page = BufferGetPage(dBuffer);
page = BufferGetPage(dBuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
rightlink = GinPageGetOpaque(page)->rightlink;
page = BufferGetPage(lBuffer);
page = BufferGetPage(lBuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinPageGetOpaque(page)->rightlink = rightlink;
/* Delete downlink from parent */
parentPage = BufferGetPage(pBuffer);
parentPage = BufferGetPage(pBuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
#ifdef USE_ASSERT_CHECKING
do
{
@ -230,7 +231,7 @@ ginDeletePage(GinVacuumState *gvs, BlockNumber deleteBlkno, BlockNumber leftBlkn
#endif
GinPageDeletePostingItem(parentPage, myoff);
page = BufferGetPage(dBuffer);
page = BufferGetPage(dBuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
/*
* we shouldn't change rightlink field to save workability of running
@ -268,7 +269,8 @@ ginDeletePage(GinVacuumState *gvs, BlockNumber deleteBlkno, BlockNumber leftBlkn
recptr = XLogInsert(RM_GIN_ID, XLOG_GIN_DELETE_PAGE);
PageSetLSN(page, recptr);
PageSetLSN(parentPage, recptr);
PageSetLSN(BufferGetPage(lBuffer), recptr);
PageSetLSN(BufferGetPage(lBuffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST), recptr);
}
if (!isParentRoot)
@ -324,7 +326,7 @@ ginScanToDelete(GinVacuumState *gvs, BlockNumber blkno, bool isRoot,
buffer = ReadBufferExtended(gvs->index, MAIN_FORKNUM, blkno,
RBM_NORMAL, gvs->strategy);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Assert(GinPageIsData(page));
@ -407,7 +409,8 @@ ginVacuumPostingTree(GinVacuumState *gvs, BlockNumber rootBlkno)
static Page
ginVacuumEntryPage(GinVacuumState *gvs, Buffer buffer, BlockNumber *roots, uint32 *nroot)
{
Page origpage = BufferGetPage(buffer),
Page origpage = BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST),
tmppage;
OffsetNumber i,
maxoff = PageGetMaxOffsetNumber(origpage);
@ -554,7 +557,8 @@ ginbulkdelete(IndexVacuumInfo *info, IndexBulkDeleteResult *stats,
/* find leaf page */
for (;;)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
IndexTuple itup;
LockBuffer(buffer, GIN_SHARE);
@ -589,7 +593,8 @@ ginbulkdelete(IndexVacuumInfo *info, IndexBulkDeleteResult *stats,
for (;;)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST);
Page resPage;
uint32 i;
@ -703,7 +708,7 @@ ginvacuumcleanup(IndexVacuumInfo *info, IndexBulkDeleteResult *stats)
buffer = ReadBufferExtended(index, MAIN_FORKNUM, blkno,
RBM_NORMAL, info->strategy);
LockBuffer(buffer, GIN_SHARE);
page = (Page) BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (PageIsNew(page) || GinPageIsDeleted(page))
{

34
src/backend/access/gin/ginxlog.c
View File

@ -28,7 +28,7 @@ ginRedoClearIncompleteSplit(XLogReaderState *record, uint8 block_id)
if (XLogReadBufferForRedo(record, block_id, &buffer) == BLK_NEEDS_REDO)
{
page = (Page) BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinPageGetOpaque(page)->flags &= ~GIN_INCOMPLETE_SPLIT;
PageSetLSN(page, lsn);
@ -48,7 +48,7 @@ ginRedoCreateIndex(XLogReaderState *record)
MetaBuffer = XLogInitBufferForRedo(record, 0);
Assert(BufferGetBlockNumber(MetaBuffer) == GIN_METAPAGE_BLKNO);
page = (Page) BufferGetPage(MetaBuffer);
page = BufferGetPage(MetaBuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinInitMetabuffer(MetaBuffer);
@ -57,7 +57,7 @@ ginRedoCreateIndex(XLogReaderState *record)
RootBuffer = XLogInitBufferForRedo(record, 1);
Assert(BufferGetBlockNumber(RootBuffer) == GIN_ROOT_BLKNO);
page = (Page) BufferGetPage(RootBuffer);
page = BufferGetPage(RootBuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinInitBuffer(RootBuffer, GIN_LEAF);
@ -78,7 +78,7 @@ ginRedoCreatePTree(XLogReaderState *record)
Page page;
buffer = XLogInitBufferForRedo(record, 0);
page = (Page) BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinInitBuffer(buffer, GIN_DATA | GIN_LEAF | GIN_COMPRESSED);
@ -98,7 +98,7 @@ ginRedoCreatePTree(XLogReaderState *record)
static void
ginRedoInsertEntry(Buffer buffer, bool isLeaf, BlockNumber rightblkno, void *rdata)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
ginxlogInsertEntry *data = (ginxlogInsertEntry *) rdata;
OffsetNumber offset = data->offset;
IndexTuple itup;
@ -293,7 +293,7 @@ ginRedoRecompress(Page page, ginxlogRecompressDataLeaf *data)
static void
ginRedoInsertData(Buffer buffer, bool isLeaf, BlockNumber rightblkno, void *rdata)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (isLeaf)
{
@ -350,7 +350,7 @@ ginRedoInsert(XLogReaderState *record)
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Size len;
char *payload = XLogRecGetBlockData(record, 0, &len);
@ -431,7 +431,7 @@ ginRedoVacuumDataLeafPage(XLogReaderState *record)
if (XLogReadBufferForRedo(record, 0, &buffer) == BLK_NEEDS_REDO)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Size len;
ginxlogVacuumDataLeafPage *xlrec;
@ -460,7 +460,7 @@ ginRedoDeletePage(XLogReaderState *record)
if (XLogReadBufferForRedo(record, 0, &dbuffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(dbuffer);
page = BufferGetPage(dbuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Assert(GinPageIsData(page));
GinPageGetOpaque(page)->flags = GIN_DELETED;
PageSetLSN(page, lsn);
@ -469,7 +469,7 @@ ginRedoDeletePage(XLogReaderState *record)
if (XLogReadBufferForRedo(record, 1, &pbuffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(pbuffer);
page = BufferGetPage(pbuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Assert(GinPageIsData(page));
Assert(!GinPageIsLeaf(page));
GinPageDeletePostingItem(page, data->parentOffset);
@ -479,7 +479,7 @@ ginRedoDeletePage(XLogReaderState *record)
if (XLogReadBufferForRedo(record, 2, &lbuffer) == BLK_NEEDS_REDO)
{
page = BufferGetPage(lbuffer);
page = BufferGetPage(lbuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
Assert(GinPageIsData(page));
GinPageGetOpaque(page)->rightlink = data->rightLink;
PageSetLSN(page, lsn);
@ -510,7 +510,7 @@ ginRedoUpdateMetapage(XLogReaderState *record)
*/
metabuffer = XLogInitBufferForRedo(record, 0);
Assert(BufferGetBlockNumber(metabuffer) == GIN_METAPAGE_BLKNO);
metapage = BufferGetPage(metabuffer);
metapage = BufferGetPage(metabuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinInitPage(metapage, GIN_META, BufferGetPageSize(metabuffer));
memcpy(GinPageGetMeta(metapage), &data->metadata, sizeof(GinMetaPageData));
@ -524,7 +524,7 @@ ginRedoUpdateMetapage(XLogReaderState *record)
*/
if (XLogReadBufferForRedo(record, 1, &buffer) == BLK_NEEDS_REDO)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
OffsetNumber off;
int i;
Size tupsize;
@ -572,7 +572,7 @@ ginRedoUpdateMetapage(XLogReaderState *record)
*/
if (XLogReadBufferForRedo(record, 1, &buffer) == BLK_NEEDS_REDO)
{
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinPageGetOpaque(page)->rightlink = data->newRightlink;
@ -603,7 +603,7 @@ ginRedoInsertListPage(XLogReaderState *record)
/* We always re-initialize the page. */
buffer = XLogInitBufferForRedo(record, 0);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinInitBuffer(buffer, GIN_LIST);
GinPageGetOpaque(page)->rightlink = data->rightlink;
@ -652,7 +652,7 @@ ginRedoDeleteListPages(XLogReaderState *record)
metabuffer = XLogInitBufferForRedo(record, 0);
Assert(BufferGetBlockNumber(metabuffer) == GIN_METAPAGE_BLKNO);
metapage = BufferGetPage(metabuffer);
metapage = BufferGetPage(metabuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinInitPage(metapage, GIN_META, BufferGetPageSize(metabuffer));
@ -681,7 +681,7 @@ ginRedoDeleteListPages(XLogReaderState *record)
Page page;
buffer = XLogInitBufferForRedo(record, i + 1);
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
GinInitBuffer(buffer, GIN_DELETED);
PageSetLSN(page, lsn);