diff options
Diffstat (limited to 'src/include/access')
| -rw-r--r-- | src/include/access/nbtree.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/include/access/nbtree.h b/src/include/access/nbtree.h index 34041b8da3c..31bea4e98fe 100644 --- a/src/include/access/nbtree.h +++ b/src/include/access/nbtree.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.114 2007/11/15 21:14:42 momjian Exp $ + * $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.115 2007/11/16 19:53:50 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -289,8 +289,15 @@ typedef struct xl_btree_split * than BlockNumber for alignment reasons: SizeOfBtreeSplit is only 16-bit * aligned.) * + * If level > 0, an IndexTuple representing the HIKEY of the left page + * follows. We don't need this on leaf pages, because it's the same + * as the leftmost key in the new right page. Also, it's suppressed if + * XLogInsert chooses to store the left page's whole page image. + * * In the _L variants, next are OffsetNumber newitemoff and the new item. * (In the _R variants, the new item is one of the right page's tuples.) + * The new item, but not newitemoff, is suppressed if XLogInsert chooses + * to store the left page's whole page image. * * Last are the right page's tuples in the form used by _bt_restore_page. */ |