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Detect and handles the case where a row is modified or deleted while it

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is being read during SELECT processing. (CVS 5399)

FossilOrigin-Name: c80a5d09935c60a2a50bc262c172a94073355f0d
This commit is contained in:
drh
2008-07-11 21:02:53 +00:00
parent f460809030
commit a34605859d
11 changed files with 189 additions and 59 deletions
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6
src/btreeInt.h
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@@ -9,7 +9,7 @@
** May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btreeInt.h,v 1.24 2008/07/10 00:32:42 drh Exp $
** $Id: btreeInt.h,v 1.25 2008/07/11 21:02:54 drh Exp $
**
** This file implements a external (disk-based) database using BTrees.
** For a detailed discussion of BTrees, refer to
@@ -466,7 +466,7 @@ struct BtCursor {
** The table that this cursor was opened on still exists, but has been
** modified since the cursor was last used. The cursor position is saved
** in variables BtCursor.pKey and BtCursor.nKey. When a cursor is in
** this state, restoreOrClearCursorPosition() can be called to attempt to
** this state, restoreCursorPosition() can be called to attempt to
** seek the cursor to the saved position.
**
** CURSOR_FAULT:
@@ -631,7 +631,7 @@ int sqlite3BtreeGetPage(BtShared*, Pgno, MemPage**, int);
int sqlite3BtreeInitPage(MemPage *pPage, MemPage *pParent);
void sqlite3BtreeParseCellPtr(MemPage*, u8*, CellInfo*);
void sqlite3BtreeParseCell(MemPage*, int, CellInfo*);
int sqlite3BtreeRestoreOrClearCursorPosition(BtCursor *pCur);
int sqlite3BtreeRestoreCursorPosition(BtCursor *pCur);
void sqlite3BtreeGetTempCursor(BtCursor *pCur, BtCursor *pTempCur);
void sqlite3BtreeReleaseTempCursor(BtCursor *pCur);
int sqlite3BtreeIsRootPage(MemPage *pPage);