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SQLite training in Houston TX on 2019-11-05 (details)
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Overview
Comment:If an error occurs in PagerBegin(), call pager_end_transaction() to reset the internal state of the pager object. (CVS 6855)
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SHA1: ea7ed16628da29cf4a127a25cbac8ae553e2ac1f
User & Date: danielk1977 2009-07-07 13:56:24
Context
2009-07-07
15:47
Do not load the root-page of a b-tree table/index when opening a cursor. Instead, allow it to be loaded when the cursor is first used (in function moveToRoot()). Also move the root-page flags sanity checks that were a part of the OP_OpenRead/OpenWrite opcodes into the moveToRoot() function. (CVS 6856) check-in: 06dcfe72 user: danielk1977 tags: trunk
13:56
If an error occurs in PagerBegin(), call pager_end_transaction() to reset the internal state of the pager object. (CVS 6855) check-in: ea7ed166 user: danielk1977 tags: trunk
11:39
Fix a reference count problem following database corruption detection in the ptrmapPut() routine of btree.c. (CVS 6854) check-in: ec1e27e3 user: drh tags: trunk
Changes
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Changes to src/pager.c.

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** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.604 2009/07/06 21:54:41 drh Exp $
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"

/*
** Macros for troubleshooting.  Normally turned off
*/
................................................................................
    assert( pPager->dbOrigSize==0 );
    assert( pPager->pInJournal==0 );
    rc = pager_open_journal(pPager);
  }

  PAGERTRACE(("TRANSACTION %d\n", PAGERID(pPager)));
  assert( !isOpen(pPager->jfd) || pPager->journalOff>0 || rc!=SQLITE_OK );









  return rc;
}

/*
** Mark a single data page as writeable. The page is written into the 
** main journal or sub-journal as required. If the page is written into
** one of the journals, the corresponding bit is set in the 







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** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.605 2009/07/07 13:56:24 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"

/*
** Macros for troubleshooting.  Normally turned off
*/
................................................................................
    assert( pPager->dbOrigSize==0 );
    assert( pPager->pInJournal==0 );
    rc = pager_open_journal(pPager);
  }

  PAGERTRACE(("TRANSACTION %d\n", PAGERID(pPager)));
  assert( !isOpen(pPager->jfd) || pPager->journalOff>0 || rc!=SQLITE_OK );
  if( rc!=SQLITE_OK ){
    assert( !pPager->dbModified );
    /* Ignore any IO error that occurs within pager_end_transaction(). The
    ** purpose of this call is to reset the internal state of the pager
    ** sub-system. It doesn't matter if the journal-file is not properly
    ** finalized at this point (since it is not a valid journal file anyway).
    */
    pager_end_transaction(pPager, 0);
  }
  return rc;
}

/*
** Mark a single data page as writeable. The page is written into the 
** main journal or sub-journal as required. If the page is written into
** one of the journals, the corresponding bit is set in the