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Fix scan adjustment.

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This commit is contained in:
Vadim B. Mikheev
1998-07-30 05:05:05 +00:00
parent 957ff1a0b5
commit f73fc6eb29
3 changed files with 148 additions and 12 deletions
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26
src/include/access/nbtree.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: nbtree.h,v 1.20 1998/02/26 04:40:22 momjian Exp $
* $Id: nbtree.h,v 1.21 1998/07/30 05:05:05 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -62,18 +62,26 @@ typedef BTPageOpaqueData *BTPageOpaque;
* semop() calls, which are expensive.
*
* And it's used to remember actual scankey info (we need in it
* if some scankeys evaled at runtime.
* if some scankeys evaled at runtime).
*
* curHeapIptr & mrkHeapIptr are heap iptr-s from current/marked
* index tuples: we don't adjust scans on insertions (and, if LLL
* is ON, don't hold locks on index pages between passes) - we
* use these pointers to restore index scan positions...
* - vadim 07/29/98
*/
typedef struct BTScanOpaqueData
{
Buffer btso_curbuf;
Buffer btso_mrkbuf;
uint16 qual_ok; /* 0 for quals like key == 1 && key > 2 */
uint16 numberOfKeys; /* number of keys */
uint16 numberOfFirstKeys; /* number of keys for 1st
* attribute */
ScanKey keyData; /* key descriptor */
Buffer btso_curbuf;
Buffer btso_mrkbuf;
ItemPointerData curHeapIptr;
ItemPointerData mrkHeapIptr;
uint16 qual_ok; /* 0 for quals like key == 1 && key > 2 */
uint16 numberOfKeys; /* number of keys */
uint16 numberOfFirstKeys; /* number of keys for 1st
* attribute */
ScanKey keyData; /* key descriptor */
} BTScanOpaqueData;
typedef BTScanOpaqueData *BTScanOpaque;