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 0f6a40168ca..2b0b1da7636 100644 --- a/src/include/access/nbtree.h +++ b/src/include/access/nbtree.h @@ -225,11 +225,17 @@ typedef struct BTMetaPageData * To facilitate accelerated sorting, an operator class may choose to * offer a second procedure (BTSORTSUPPORT_PROC). For full details, see * src/include/utils/sortsupport.h. + * + * To support window frames defined by "RANGE offset PRECEDING/FOLLOWING", + * 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. */ #define BTORDER_PROC 1 #define BTSORTSUPPORT_PROC 2 -#define BTNProcs 2 +#define BTINRANGE_PROC 3 +#define BTNProcs 3 /* * We need to be able to tell the difference between read and write |