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Further optimize multi-key GIN searches.

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If we're skipping past a certain TID, avoid decoding posting list segments
that only contain smaller TIDs.

Extracted from Alexander Korotkov's fast scan patch, heavily modified.
This commit is contained in:
Heikki Linnakangas
2014-01-29 18:23:17 +02:00
parent e20c70cb0f
commit 25b1dafab6
3 changed files with 39 additions and 7 deletions
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src/include/access/gin_private.h
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@@ -692,7 +692,7 @@ extern ItemPointer ginReadTuple(GinState *ginstate, OffsetNumber attnum,
IndexTuple itup, int *nitems);
/* gindatapage.c */
extern ItemPointer GinDataLeafPageGetItems(Page page, int *nitems);
extern ItemPointer GinDataLeafPageGetItems(Page page, int *nitems, ItemPointerData advancePast);
extern int GinDataLeafPageGetItemsToTbm(Page page, TIDBitmap *tbm);
extern BlockNumber createPostingTree(Relation index,
ItemPointerData *items, uint32 nitems,