SQLite

    ** function has already been called, it is mostly a no-op.  However, any
    ** backup in progress needs to be restarted.
    */
    sqlite3BackupRestart(pPager->pBackup);
  }else{
    if( pagerUseWal(pPager) ){
      PgHdr *pList = sqlite3PcacheDirtyList(pPager->pPCache);
      PgHdr *pPageOne = 0;
      if( pList==0 ){
        /* Must have at least one page for the WAL commit flag.
        ** Ticket [2d1a5c67dfc2363e44f29d9bbd57f] 2011-05-18 */
        rc = sqlite3PagerGet(pPager, 1, &pPageOne);
        pList = pPageOne;
        pList->pDirty = 0;
      }
      assert( pList!=0 || rc!=SQLITE_OK );
      if( pList ){
        rc = pagerWalFrames(pPager, pList, pPager->dbSize, 1, 
            (pPager->fullSync ? pPager->syncFlags : 0)
        );
      }
      sqlite3PagerUnref(pPageOne);
      if( rc==SQLITE_OK ){
        sqlite3PcacheCleanAll(pPager->pPCache);
      }
    }else{
      /* The following block updates the change-counter. Exactly how it
      ** does this depends on whether or not the atomic-update optimization
      ** was enabled at compile time, and if this transaction meets the 

# 2011 May 19
#
# The author disclaims copyright to this source code.  In place of
# 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.
#
#***********************************************************************
# This file implements regression tests for SQLite library. Specifically,
# it tests that ticket [2d1a5c67dfc2363e44f29d9bbd57f7331851390a] has
# been resolved.
#
# 
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !wal {finish_test; return}

for {set ii 1} {$ii<=10} {incr ii} {
  do_test tkt-2d1a5c67d.1.$ii {
    db close
    forcedelete test.db test.db-wal
    sqlite3 db test.db
    db eval "PRAGMA cache_size=$::ii"
    db eval {
      PRAGMA journal_mode=WAL;
      CREATE TABLE t1(a,b);
      CREATE INDEX t1b ON t1(b);
      CREATE TABLE t2(x,y UNIQUE);
      INSERT INTO t2 VALUES(3,4);
      BEGIN;
      INSERT INTO t1(a,b) VALUES(1,2);
      SELECT 'A', * FROM t2 WHERE y=4;
      SELECT 'B', * FROM t1;
      COMMIT;
      SELECT 'C', * FROM t1;
    }
  } {wal A 3 4 B 1 2 C 1 2}
}

db close
forcedelete test.db test.db-wal
sqlite3 db test.db
register_wholenumber_module db
db eval {
  PRAGMA journal_mode=WAL;
  CREATE TABLE t1(a,b);
  CREATE INDEX t1b ON t1(b);
  CREATE TABLE t2(x,y);
  CREATE VIRTUAL TABLE nums USING wholenumber;
  INSERT INTO t2 SELECT value, randomblob(1000) FROM nums
                 WHERE value BETWEEN 1 AND 1000;
}

for {set ii 1} {$ii<=10} {incr ii} {
  do_test tkt-2d1a5c67d.2.$ii {
    db eval "PRAGMA cache_size=$::ii"
    db eval {
      DELETE FROM t1;
      BEGIN;
      INSERT INTO t1(a,b) VALUES(1,2);
      SELECT sum(length(y)) FROM t2;
      COMMIT;
      SELECT * FROM t1;
    }
  } {1000000 1 2}
}

finish_test