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nbtree: Rename BT_HEAP_TID_ATTR.

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Author: Peter Geoghegan
Reviewed-By: Heikki Linnakangas
This commit is contained in:
Peter Geoghegan
2020-01-10 13:15:28 -08:00
parent a0dc3c19ed
commit 1a4a032965
1 changed files with 5 additions and 6 deletions
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11
src/include/access/nbtree.h
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@ -263,9 +263,8 @@ typedef struct BTMetaPageData
* offset field only stores the number of columns/attributes when the
* INDEX_ALT_TID_MASK bit is set, which doesn't count the trailing heap
* TID column sometimes stored in pivot tuples -- that's represented by
* the presence of BT_HEAP_TID_ATTR. The INDEX_ALT_TID_MASK bit in t_info
* is always set on BTREE_VERSION 4. BT_HEAP_TID_ATTR can only be set on
* BTREE_VERSION 4.
* the presence of BT_PIVOT_HEAP_TID_ATTR. The INDEX_ALT_TID_MASK bit in
* t_info is always set on BTREE_VERSION 4 pivot tuples.
*
* In version 3 indexes, the INDEX_ALT_TID_MASK flag might not be set in
* pivot tuples. In that case, the number of key columns is implicitly
@ -296,7 +295,7 @@ typedef struct BTMetaPageData
/* Item pointer offset bits */
#define BT_RESERVED_OFFSET_MASK 0xF000
#define BT_N_KEYS_OFFSET_MASK 0x0FFF
#define BT_HEAP_TID_ATTR 0x1000
#define BT_PIVOT_HEAP_TID_ATTR 0x1000
/* Get/set downlink block number in pivot tuple */
#define BTreeTupleGetDownLink(itup) \
@ -347,7 +346,7 @@ typedef struct BTMetaPageData
#define BTreeTupleGetHeapTID(itup) \
( \
(itup)->t_info & INDEX_ALT_TID_MASK && \
(ItemPointerGetOffsetNumberNoCheck(&(itup)->t_tid) & BT_HEAP_TID_ATTR) != 0 ? \
(ItemPointerGetOffsetNumberNoCheck(&(itup)->t_tid) & BT_PIVOT_HEAP_TID_ATTR) != 0 ? \
( \
(ItemPointer) (((char *) (itup) + IndexTupleSize(itup)) - \
sizeof(ItemPointerData)) \
@ -362,7 +361,7 @@ typedef struct BTMetaPageData
do { \
Assert((itup)->t_info & INDEX_ALT_TID_MASK); \
ItemPointerSetOffsetNumber(&(itup)->t_tid, \
ItemPointerGetOffsetNumberNoCheck(&(itup)->t_tid) | BT_HEAP_TID_ATTR); \
ItemPointerGetOffsetNumberNoCheck(&(itup)->t_tid) | BT_PIVOT_HEAP_TID_ATTR); \
} while(0)
/*