Fix bug in the new B-tree incomplete-split code.

Inserting a downlink to an internal page clears the incomplete-split flag
of the child's left sibling, so the left sibling's LSN also needs to be
updated.

diff --git a/src/backend/access/nbtree/nbtinsert.c b/src/backend/access/nbtree/nbtinsert.c
index 3fbeb41d6a89a8f7d269e82e7ab47f0797c4e1d8..d2ca8d9350ed6473fd8b7edd9c1fab8f51388ab2 100644 (file)
--- a/src/backend/access/nbtree/nbtinsert.c
+++ b/src/backend/access/nbtree/nbtinsert.c
@@ -910,6 +910,10 @@ _bt_insertonpg(Relation rel,
            {
                PageSetLSN(metapg, recptr);
            }
+           if (BufferIsValid(cbuf))
+           {
+               PageSetLSN(BufferGetPage(cbuf), recptr);
+           }
 
            PageSetLSN(page, recptr);
        }
@@ -1402,6 +1406,10 @@ _bt_split(Relation rel, Buffer buf, Buffer cbuf, OffsetNumber firstright,
        {
            PageSetLSN(spage, recptr);
        }
+       if (!isleaf)
+       {
+           PageSetLSN(BufferGetPage(cbuf), recptr);
+       }
    }
 
    END_CRIT_SECTION();