database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-03 20:02:46 +03:00
Code Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

19
src/backend/access/spgist/spgutils.c
View File

@ -126,7 +126,8 @@ spgGetCache(Relation index)
metabuffer = ReadBuffer(index, SPGIST_METAPAGE_BLKNO);
LockBuffer(metabuffer, BUFFER_LOCK_SHARE);
metadata = SpGistPageGetMeta(BufferGetPage(metabuffer));
metadata = SpGistPageGetMeta
(BufferGetPage(metabuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST));
if (metadata->magicNumber != SPGIST_MAGIC_NUMBER)
elog(ERROR, "index \"%s\" is not an SP-GiST index",
@ -206,7 +207,8 @@ SpGistNewBuffer(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 */
@ -256,7 +258,8 @@ SpGistUpdateMetaPage(Relation index)
if (ConditionalLockBuffer(metabuffer))
{
metadata = SpGistPageGetMeta(BufferGetPage(metabuffer));
metadata = SpGistPageGetMeta
(BufferGetPage(metabuffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST));
metadata->lastUsedPages = cache->lastUsedPages;
MarkBufferDirty(metabuffer);
@ -333,7 +336,9 @@ allocNewBuffer(Relation index, int flags)
blkFlags |= GBUF_NULLS;
cache->lastUsedPages.cachedPage[blkFlags].blkno = blkno;
cache->lastUsedPages.cachedPage[blkFlags].freeSpace =
PageGetExactFreeSpace(BufferGetPage(buffer));
PageGetExactFreeSpace
(BufferGetPage(buffer, NULL, NULL,
BGP_NO_SNAPSHOT_TEST));
UnlockReleaseBuffer(buffer);
}
}
@ -401,7 +406,7 @@ SpGistGetBuffer(Relation index, int flags, int needSpace, bool *isNew)
return allocNewBuffer(index, flags);
}
page = BufferGetPage(buffer);
page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
if (PageIsNew(page) || SpGistPageIsDeleted(page) || PageIsEmpty(page))
{
@ -460,7 +465,7 @@ SpGistSetLastUsedPage(Relation index, Buffer buffer)
SpGistCache *cache = spgGetCache(index);
SpGistLastUsedPage *lup;
int freeSpace;
Page page = BufferGetPage(buffer);
Page page = BufferGetPage(buffer, NULL, NULL, BGP_NO_SNAPSHOT_TEST);
BlockNumber blkno = BufferGetBlockNumber(buffer);
int flags;
@ -508,7 +513,7 @@ void
SpGistInitBuffer(Buffer b, uint16 f)
{
Assert(BufferGetPageSize(b) == BLCKSZ);
SpGistInitPage(BufferGetPage(b), f);
SpGistInitPage(BufferGetPage(b, NULL, NULL, BGP_NO_SNAPSHOT_TEST), f);
}
/*