diff options
Diffstat (limited to 'src/backend/access/gist/gistget.c')
| -rw-r--r-- | src/backend/access/gist/gistget.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/backend/access/gist/gistget.c b/src/backend/access/gist/gistget.c index 56921cfee0..5061003a3b 100644 --- a/src/backend/access/gist/gistget.c +++ b/src/backend/access/gist/gistget.c @@ -254,9 +254,15 @@ gistScanPage(IndexScanDesc scan, GISTSearchItem *pageItem, double *myDistances, page = BufferGetPage(buffer); opaque = GistPageGetOpaque(page); - /* check if page split occurred since visit to parent */ + /* + * Check if we need to follow the rightlink. We need to follow it if the + * page was concurrently split since we visited the parent (in which case + * parentlsn < nsn), or if the the system crashed after a page split but + * before the downlink was inserted into the parent. + */ if (!XLogRecPtrIsInvalid(pageItem->data.parentlsn) && - XLByteLT(pageItem->data.parentlsn, opaque->nsn) && + (GistFollowRight(page) || + XLByteLT(pageItem->data.parentlsn, opaque->nsn)) && opaque->rightlink != InvalidBlockNumber /* sanity check */ ) { /* There was a page split, follow right link to add pages */ |