diff options
Diffstat (limited to 'src/backend/access/gist/gist.c')
| -rw-r--r-- | src/backend/access/gist/gist.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/backend/access/gist/gist.c b/src/backend/access/gist/gist.c index b0711052fc..64125d5195 100644 --- a/src/backend/access/gist/gist.c +++ b/src/backend/access/gist/gist.c @@ -220,6 +220,7 @@ gistplacetopage(Relation rel, Size freespace, GISTSTATE *giststate, GistNSN oldnsn = 0; SplitedPageLayout rootpg; bool is_rootsplit; + int npage; is_rootsplit = (blkno == GIST_ROOT_BLKNO); @@ -241,6 +242,19 @@ gistplacetopage(Relation rel, Size freespace, GISTSTATE *giststate, dist = gistSplit(rel, page, itvec, tlen, giststate); /* + * Check that split didn't produce too many pages. + */ + npage = 0; + for (ptr = dist; ptr; ptr = ptr->next) + npage++; + /* in a root split, we'll add one more page to the list below */ + if (is_rootsplit) + npage++; + if (npage > GIST_MAX_SPLIT_PAGES) + elog(ERROR, "GiST page split into too many halves (%d, maximum %d)", + npage, GIST_MAX_SPLIT_PAGES); + + /* * Set up pages to work with. Allocate new buffers for all but the * leftmost page. The original page becomes the new leftmost page, and * is just replaced with the new contents. |