diff options
Diffstat (limited to 'src/include/access/nbtree.h')
| -rw-r--r-- | src/include/access/nbtree.h | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/src/include/access/nbtree.h b/src/include/access/nbtree.h index 779a42229b7..64c6982f50e 100644 --- a/src/include/access/nbtree.h +++ b/src/include/access/nbtree.h @@ -73,6 +73,7 @@ typedef BTPageOpaqueData *BTPageOpaque; #define BTP_HALF_DEAD (1 << 4) /* empty, but still in tree */ #define BTP_SPLIT_END (1 << 5) /* rightmost page of split group */ #define BTP_HAS_GARBAGE (1 << 6) /* page has LP_DEAD tuples */ +#define BTP_INCOMPLETE_SPLIT (1 << 7) /* right sibling's downlink is missing */ /* * The max allowed value of a cycle ID is a bit less than 64K. This is @@ -178,6 +179,7 @@ typedef struct BTMetaPageData #define P_ISHALFDEAD(opaque) ((opaque)->btpo_flags & BTP_HALF_DEAD) #define P_IGNORE(opaque) ((opaque)->btpo_flags & (BTP_DELETED|BTP_HALF_DEAD)) #define P_HAS_GARBAGE(opaque) ((opaque)->btpo_flags & BTP_HAS_GARBAGE) +#define P_INCOMPLETE_SPLIT(opaque) ((opaque)->btpo_flags & BTP_INCOMPLETE_SPLIT) /* * Lehman and Yao's algorithm requires a ``high key'' on every non-rightmost @@ -253,7 +255,7 @@ typedef struct xl_btree_metadata typedef struct xl_btree_insert { xl_btreetid target; /* inserted tuple id */ - /* BlockNumber downlink field FOLLOWS IF NOT XLOG_BTREE_INSERT_LEAF */ + /* BlockNumber finishes_split field FOLLOWS IF NOT XLOG_BTREE_INSERT_LEAF */ /* xl_btree_metadata FOLLOWS IF XLOG_BTREE_INSERT_META */ /* INDEX TUPLE FOLLOWS AT END OF STRUCT */ } xl_btree_insert; @@ -286,19 +288,18 @@ typedef struct xl_btree_split OffsetNumber firstright; /* first item moved to right page */ /* - * If level > 0, BlockIdData downlink follows. (We use BlockIdData rather - * than BlockNumber for alignment reasons: SizeOfBtreeSplit is only 16-bit - * aligned.) + * 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. * * 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. + * If level > 0, BlockNumber of the page whose incomplete-split flag + * this insertion clears. (not aligned) * * Last are the right page's tuples in the form used by _bt_restore_page. */ @@ -642,8 +643,7 @@ extern Datum btoptions(PG_FUNCTION_ARGS); extern bool _bt_doinsert(Relation rel, IndexTuple itup, IndexUniqueCheck checkUnique, Relation heapRel); extern Buffer _bt_getstackbuf(Relation rel, BTStack stack, int access); -extern void _bt_insert_parent(Relation rel, Buffer buf, Buffer rbuf, - BTStack stack, bool is_root, bool is_only); +extern void _bt_finish_split(Relation rel, Buffer bbuf, BTStack stack); /* * prototypes for functions in nbtpage.c @@ -673,7 +673,8 @@ extern BTStack _bt_search(Relation rel, int keysz, ScanKey scankey, bool nextkey, Buffer *bufP, int access); extern Buffer _bt_moveright(Relation rel, Buffer buf, int keysz, - ScanKey scankey, bool nextkey, int access); + ScanKey scankey, bool nextkey, bool forupdate, BTStack stack, + int access); extern OffsetNumber _bt_binsrch(Relation rel, Buffer buf, int keysz, ScanKey scankey, bool nextkey); extern int32 _bt_compare(Relation rel, int keysz, ScanKey scankey, @@ -722,8 +723,5 @@ extern void _bt_leafbuild(BTSpool *btspool, BTSpool *spool2); */ extern void btree_redo(XLogRecPtr lsn, XLogRecord *record); extern void btree_desc(StringInfo buf, uint8 xl_info, char *rec); -extern void btree_xlog_startup(void); -extern void btree_xlog_cleanup(void); -extern bool btree_safe_restartpoint(void); #endif /* NBTREE_H */ |