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Rewrite PageIndexDeleteNoCompact into a form that only deletes 1 tuple.

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The full generality of deleting an arbitrary number of tuples is no longer
needed, so let's save some code and cycles by replacing the original coding
with an implementation based on PageIndexTupleDelete.

We can always get back the old code from git if we need it again for new
callers (though I don't care for its willingness to mess with line pointers
it wasn't told to mess with).

Discussion: <552.1473445163@sss.pgh.pa.us>
This commit is contained in:
Tom Lane
2016-09-09 19:00:59 -04:00
parent 1a4be103a5
commit 24992c6db9
4 changed files with 79 additions and 134 deletions
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3
src/include/storage/bufpage.h
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@@ -429,8 +429,7 @@ extern Size PageGetExactFreeSpace(Page page);
extern Size PageGetHeapFreeSpace(Page page);
extern void PageIndexTupleDelete(Page page, OffsetNumber offset);
extern void PageIndexMultiDelete(Page page, OffsetNumber *itemnos, int nitems);
extern void PageIndexDeleteNoCompact(Page page, OffsetNumber *itemnos,
int nitems);
extern void PageIndexTupleDeleteNoCompact(Page page, OffsetNumber offset);
extern bool PageIndexTupleOverwrite(Page page, OffsetNumber offnum,
Item newtup, Size newsize);
extern char *PageSetChecksumCopy(Page page, BlockNumber blkno);