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Commit4c45832

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Concurrency... Highest one...
DO NOT EVEN TRY TO DO PageGetMaxOffsetNumber BEFORELockBuffer!-:)
1 parent8864ee0 commit4c45832

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1 file changed

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‎src/backend/access/nbtree/nbtree.c

Lines changed: 8 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtree.c,v 1.40 1999/05/25 22:04:13 momjian Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtree.c,v 1.41 1999/06/07 15:14:54 vadim Exp $
1212
*
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* NOTES
1414
* This file contains only the public interface routines.
@@ -618,16 +618,19 @@ _bt_restscan(IndexScanDesc scan)
618618
Relationrel=scan->relation;
619619
BTScanOpaqueso= (BTScanOpaque)scan->opaque;
620620
Bufferbuf=so->btso_curbuf;
621-
Pagepage=BufferGetPage(buf);
621+
Pagepage;
622622
ItemPointercurrent=&(scan->currentItemData);
623623
OffsetNumberoffnum=ItemPointerGetOffsetNumber(current),
624-
maxoff=PageGetMaxOffsetNumber(page);
625-
BTPageOpaqueopaque= (BTPageOpaque)PageGetSpecialPointer(page);
624+
maxoff;
625+
BTPageOpaqueopaque;
626626
ItemPointerDatatarget=so->curHeapIptr;
627627
BTItemitem;
628628
BlockNumberblkno;
629629

630-
LockBuffer(buf,BT_READ);
630+
LockBuffer(buf,BT_READ);/* lock buffer first! */
631+
page=BufferGetPage(buf);
632+
maxoff=PageGetMaxOffsetNumber(page);
633+
opaque= (BTPageOpaque)PageGetSpecialPointer(page);
631634

632635
/*
633636
* We use this as flag when first index tuple on page is deleted but

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