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Make GiST indexes on-disk compatible with 9.2 again.

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The patch that turned XLogRecPtr into a uint64 inadvertently changed the
on-disk format of GiST indexes, because the NSN field in the GiST page
opaque is an XLogRecPtr. That breaks pg_upgrade. Revert the format of that
field back to the two-field struct that XLogRecPtr was before. This is the
same we did to LSNs in the page header to avoid changing on-disk format.

Bump catversion, as this invalidates any existing GiST indexes built on
9.3devel.
This commit is contained in:
Heikki Linnakangas
2013-01-17 16:35:46 +02:00
parent bba486f372
commit 9ee4d06f3f
7 changed files with 40 additions and 25 deletions
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2
src/backend/access/gist/gistvacuum.c
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@ -114,7 +114,7 @@ pushStackIfSplited(Page page, GistBDItem *stack)
GISTPageOpaque opaque = GistPageGetOpaque(page);
if (stack->blkno != GIST_ROOT_BLKNO && !XLogRecPtrIsInvalid(stack->parentlsn) &&
(GistFollowRight(page) || stack->parentlsn < opaque->nsn) &&
(GistFollowRight(page) || stack->parentlsn < GistPageGetNSN(page)) &&
opaque->rightlink != InvalidBlockNumber /* sanity check */ )
{
/* split page detected, install right link to the stack */