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Diffstat (limited to 'src/backend/access/gist/gistbuild.c')
| -rw-r--r-- | src/backend/access/gist/gistbuild.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/backend/access/gist/gistbuild.c b/src/backend/access/gist/gistbuild.c index 188e33642f..28bc5855ad 100644 --- a/src/backend/access/gist/gistbuild.c +++ b/src/backend/access/gist/gistbuild.c @@ -540,6 +540,19 @@ gist_indexsortbuild_pagestate_flush(GISTBuildState *state, /* Re-initialize the page buffer for next page on this level. */ pagestate->page = palloc(BLCKSZ); gistinitpage(pagestate->page, isleaf ? F_LEAF : 0); + + /* + * Set the right link to point to the previous page. This is just for + * debugging purposes: GiST only follows the right link if a page is split + * concurrently to a scan, and that cannot happen during index build. + * + * It's a bit counterintuitive that we set the right link on the new page + * to point to the previous page, and not the other way round. But GiST + * pages are not ordered like B-tree pages are, so as long as the + * right-links form a chain through all the pages in the same level, the + * order doesn't matter. + */ + GistPageGetOpaque(pagestate->page)->rightlink = blkno; } static void |