diff options
Diffstat (limited to 'src/include/access/nbtxlog.h')
| -rw-r--r-- | src/include/access/nbtxlog.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/include/access/nbtxlog.h b/src/include/access/nbtxlog.h index a8ccdcec426..c55b618ff7d 100644 --- a/src/include/access/nbtxlog.h +++ b/src/include/access/nbtxlog.h @@ -28,7 +28,8 @@ #define XLOG_BTREE_INSERT_META 0x20 /* same, plus update metapage */ #define XLOG_BTREE_SPLIT_L 0x30 /* add index tuple with split */ #define XLOG_BTREE_SPLIT_R 0x40 /* as above, new item on right */ -/* 0x50 and 0x60 are unused */ +#define XLOG_BTREE_SPLIT_L_HIGHKEY 0x50 /* as above, include truncated highkey */ +#define XLOG_BTREE_SPLIT_R_HIGHKEY 0x60 /* as above, include truncated highkey */ #define XLOG_BTREE_DELETE 0x70 /* delete leaf index tuples for a page */ #define XLOG_BTREE_UNLINK_PAGE 0x80 /* delete a half-dead page */ #define XLOG_BTREE_UNLINK_PAGE_META 0x90 /* same, and update metapage */ @@ -82,10 +83,11 @@ typedef struct xl_btree_insert * Note: the four XLOG_BTREE_SPLIT xl_info codes all use this data record. * The _L and _R variants indicate whether the inserted tuple went into the * left or right split page (and thus, whether newitemoff and the new item - * are stored or not). The _ROOT variants indicate that we are splitting - * the root page, and thus that a newroot record rather than an insert or - * split record should follow. Note that a split record never carries a - * metapage update --- we'll do that in the parent-level update. + * are stored or not). The _HIGHKEY variants indicate that we've logged + * explicitly left page high key value, otherwise redo should use right page + * leftmost key as a left page high key. _HIGHKEY is specified for internal + * pages where right page leftmost key is suppressed, and for leaf pages + * of covering indexes where high key have non-key attributes truncated. * * Backup Blk 0: original page / new left page * |