diff options
| author | Tom Lane | 2007-09-20 17:56:33 +0000 |
|---|---|---|
| committer | Tom Lane | 2007-09-20 17:56:33 +0000 |
| commit | 282d2a03dd30804b01f8042f640d638c2ee76604 (patch) | |
| tree | 004f08ce31f1bfb03ab55571ad7867babe5b3d7f /src/backend/access/gin/ginentrypage.c | |
| parent | bbf4fdc2538097bb3103806e1419ceef1f289203 (diff) | |
HOT updates. When we update a tuple without changing any of its indexed
columns, and the new version can be stored on the same heap page, we no longer
generate extra index entries for the new version. Instead, index searches
follow the HOT-chain links to ensure they find the correct tuple version.
In addition, this patch introduces the ability to "prune" dead tuples on a
per-page basis, without having to do a complete VACUUM pass to recover space.
VACUUM is still needed to clean up dead index entries, however.
Pavan Deolasee, with help from a bunch of other people.
Diffstat (limited to 'src/backend/access/gin/ginentrypage.c')
| -rw-r--r-- | src/backend/access/gin/ginentrypage.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/backend/access/gin/ginentrypage.c b/src/backend/access/gin/ginentrypage.c index a5253da0211..70867ac40ba 100644 --- a/src/backend/access/gin/ginentrypage.c +++ b/src/backend/access/gin/ginentrypage.c @@ -8,7 +8,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/access/gin/ginentrypage.c,v 1.8 2007/09/12 22:10:25 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/access/gin/ginentrypage.c,v 1.9 2007/09/20 17:56:30 tgl Exp $ *------------------------------------------------------------------------- */ @@ -359,7 +359,7 @@ entryPlaceToPage(GinBtree btree, Buffer buf, OffsetNumber off, XLogRecData **prd *prdata = rdata; data.updateBlkno = entryPreparePage(btree, page, off); - placed = PageAddItem(page, (Item) btree->entry, IndexTupleSize(btree->entry), off, false); + placed = PageAddItem(page, (Item) btree->entry, IndexTupleSize(btree->entry), off, false, false); if (placed != off) elog(ERROR, "failed to add item to index page in \"%s\"", RelationGetRelationName(btree->index)); @@ -488,7 +488,7 @@ entrySplitPage(GinBtree btree, Buffer lbuf, Buffer rbuf, OffsetNumber off, XLogR lsize += MAXALIGN(IndexTupleSize(itup)) + sizeof(ItemIdData); } - if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false) == InvalidOffsetNumber) + if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false, false) == InvalidOffsetNumber) elog(ERROR, "failed to add item to index page in \"%s\"", RelationGetRelationName(btree->index)); ptr += MAXALIGN(IndexTupleSize(itup)); @@ -563,11 +563,11 @@ entryFillRoot(GinBtree btree, Buffer root, Buffer lbuf, Buffer rbuf) page = BufferGetPage(root); itup = ginPageGetLinkItup(lbuf); - if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false) == InvalidOffsetNumber) + if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false, false) == InvalidOffsetNumber) elog(ERROR, "failed to add item to index root page"); itup = ginPageGetLinkItup(rbuf); - if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false) == InvalidOffsetNumber) + if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false, false) == InvalidOffsetNumber) elog(ERROR, "failed to add item to index root page"); } |