diff options
Diffstat (limited to 'src/include/access/nbtree.h')
| -rw-r--r-- | src/include/access/nbtree.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/include/access/nbtree.h b/src/include/access/nbtree.h index 20ace69dab4..e8d4d2b55b7 100644 --- a/src/include/access/nbtree.h +++ b/src/include/access/nbtree.h @@ -387,12 +387,17 @@ typedef struct BTMetaPageData * an operator class may choose to offer a third amproc procedure * (BTINRANGE_PROC), independently of whether it offers sortsupport. * For full details, see doc/src/sgml/btree.sgml. + * + * To facilitate B-Tree deduplication, an operator class may choose to + * offer a forth amproc procedure (BTEQUALIMAGE_PROC). For full details, + * see doc/src/sgml/btree.sgml. */ #define BTORDER_PROC 1 #define BTSORTSUPPORT_PROC 2 #define BTINRANGE_PROC 3 -#define BTNProcs 3 +#define BTEQUALIMAGE_PROC 4 +#define BTNProcs 4 /* * We need to be able to tell the difference between read and write @@ -829,6 +834,7 @@ extern bool _bt_check_natts(Relation rel, bool heapkeyspace, Page page, OffsetNumber offnum); extern void _bt_check_third_page(Relation rel, Relation heap, bool needheaptidspace, Page page, IndexTuple newtup); +extern bool _bt_allequalimage(Relation rel, bool debugmessage); /* * prototypes for functions in nbtvalidate.c |