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Overview
Comment:Do not journal the file locking page when doing a database copy as part of a VACUUM. Ticket #1432. (CVS 2703)
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Timelines: family | ancestors | descendants | both | trunk
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SHA1: 248f77972bb1be3325708ea143fd87bb7ce914a7
User & Date: drh 2005-09-16 11:32:18
Context
2005-09-16
17:16
Do not journal the locking page which doing an autovacuum. Similar to the problem of #1432 except that this one occurs on autovacuum instead of vacuum. An assert() has been added to catch any future incidents of this type. (CVS 2704) check-in: 5b6dc12b user: drh tags: trunk
11:32
Do not journal the file locking page when doing a database copy as part of a VACUUM. Ticket #1432. (CVS 2703) check-in: 248f7797 user: drh tags: trunk
10:18
Prevent the sqlite3_pagecount() function from ever returning the pending-byte page. (CVS 2702) check-in: 35a88935 user: danielk1977 tags: trunk
Changes
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Changes to src/btree.c.

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** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.267 2005/09/16 09:52:29 danielk1977 Exp $
**
** This file implements a external (disk-based) database using BTrees.
** For a detailed discussion of BTrees, refer to
**
**     Donald E. Knuth, THE ART OF COMPUTER PROGRAMMING, Volume 3:
**     "Sorting And Searching", pages 473-480. Addison-Wesley
**     Publishing Company, Reading, Massachusetts.
................................................................................
** must be active for both files.
**
** The size of file pBtFrom may be reduced by this operation.
** If anything goes wrong, the transaction on pBtFrom is rolled back.
*/
int sqlite3BtreeCopyFile(Btree *pBtTo, Btree *pBtFrom){
  int rc = SQLITE_OK;
  Pgno i, nPage, nToPage;

  if( pBtTo->inTrans!=TRANS_WRITE || pBtFrom->inTrans!=TRANS_WRITE ){
    return SQLITE_ERROR;
  }
  if( pBtTo->pCursor ) return SQLITE_BUSY;
  nToPage = sqlite3pager_pagecount(pBtTo->pPager);
  nPage = sqlite3pager_pagecount(pBtFrom->pPager);

  for(i=1; rc==SQLITE_OK && i<=nPage; i++){
    void *pPage;

    rc = sqlite3pager_get(pBtFrom->pPager, i, &pPage);
    if( rc ) break;
    rc = sqlite3pager_overwrite(pBtTo->pPager, i, pPage);
    if( rc ) break;
    sqlite3pager_unref(pPage);
  }
  for(i=nPage+1; rc==SQLITE_OK && i<=nToPage; i++){







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** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.268 2005/09/16 11:32:18 drh Exp $
**
** This file implements a external (disk-based) database using BTrees.
** For a detailed discussion of BTrees, refer to
**
**     Donald E. Knuth, THE ART OF COMPUTER PROGRAMMING, Volume 3:
**     "Sorting And Searching", pages 473-480. Addison-Wesley
**     Publishing Company, Reading, Massachusetts.
................................................................................
** must be active for both files.
**
** The size of file pBtFrom may be reduced by this operation.
** If anything goes wrong, the transaction on pBtFrom is rolled back.
*/
int sqlite3BtreeCopyFile(Btree *pBtTo, Btree *pBtFrom){
  int rc = SQLITE_OK;
  Pgno i, nPage, nToPage, iSkip;

  if( pBtTo->inTrans!=TRANS_WRITE || pBtFrom->inTrans!=TRANS_WRITE ){
    return SQLITE_ERROR;
  }
  if( pBtTo->pCursor ) return SQLITE_BUSY;
  nToPage = sqlite3pager_pagecount(pBtTo->pPager);
  nPage = sqlite3pager_pagecount(pBtFrom->pPager);
  iSkip = PENDING_BYTE_PAGE(pBtTo);
  for(i=1; rc==SQLITE_OK && i<=nPage; i++){
    void *pPage;
    if( i==iSkip ) continue;
    rc = sqlite3pager_get(pBtFrom->pPager, i, &pPage);
    if( rc ) break;
    rc = sqlite3pager_overwrite(pBtTo->pPager, i, pPage);
    if( rc ) break;
    sqlite3pager_unref(pPage);
  }
  for(i=nPage+1; rc==SQLITE_OK && i<=nToPage; i++){