** 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 1.87 2003/07/27 18:59:43 drh Exp $
*/
#include "os.h"         /* Must be first to enable large file support */
#include "sqliteInt.h"
#include "pager.h"
#include <assert.h>
#include <string.h>

................................................................................
  int readOnly = 0;
  char zTemp[SQLITE_TEMPNAME_SIZE];

  *ppPager = 0;
  if( sqlite_malloc_failed ){
    return SQLITE_NOMEM;
  }
  if( zFilename ){
    zFullPathname = sqliteOsFullPathname(zFilename);
    rc = sqliteOsOpenReadWrite(zFullPathname, &fd, &readOnly);
    tempFile = 0;
  }else{
    rc = sqlitepager_opentemp(zTemp, &fd);
    zFilename = zTemp;
    zFullPathname = sqliteOsFullPathname(zFilename);

** 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 1.88 2003/08/26 11:25:58 drh Exp $
*/
#include "os.h"         /* Must be first to enable large file support */
#include "sqliteInt.h"
#include "pager.h"
#include <assert.h>
#include <string.h>

................................................................................
  int readOnly = 0;
  char zTemp[SQLITE_TEMPNAME_SIZE];

  *ppPager = 0;
  if( sqlite_malloc_failed ){
    return SQLITE_NOMEM;
  }
  if( zFilename && zFilename[0] ){
    zFullPathname = sqliteOsFullPathname(zFilename);
    rc = sqliteOsOpenReadWrite(zFullPathname, &fd, &readOnly);
    tempFile = 0;
  }else{
    rc = sqlitepager_opentemp(zTemp, &fd);
    zFilename = zTemp;
    zFullPathname = sqliteOsFullPathname(zFilename);

#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests for miscellanous features that were
# left out of other test files.
#
# $Id: misc2.test,v 1.6 2003/07/30 12:34:13 drh Exp $

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

# Test for ticket #360
#
do_test misc2-1.1 {
................................................................................
    CREATE VIEW y AS 
      SELECT x1.b AS p, x2.b AS q FROM x AS x1, x AS x2 WHERE x1.a=x2.a;
    CREATE VIEW z AS
      SELECT y1.p, y2.p FROM y AS y1, y AS y2 WHERE y1.q=y2.q;
    SELECT * from z;
  }
} {}

#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests for miscellanous features that were
# left out of other test files.
#
# $Id: misc2.test,v 1.7 2003/08/26 11:25:58 drh Exp $

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

# Test for ticket #360
#
do_test misc2-1.1 {
................................................................................
    CREATE VIEW y AS 
      SELECT x1.b AS p, x2.b AS q FROM x AS x1, x AS x2 WHERE x1.a=x2.a;
    CREATE VIEW z AS
      SELECT y1.p, y2.p FROM y AS y1, y AS y2 WHERE y1.q=y2.q;
    SELECT * from z;
  }
} {}

# Make sure we can open a database with an empty filename.  What this
# does is store the database in a temporary file that is deleted when
# the database is closed.  Ticket #432.
#
do_test misc2-6.1 {
  db close
  sqlite db {}
  execsql {
    CREATE TABLE t1(a,b);
    INSERT INTO t1 VALUES(1,2);
    SELECT * FROM t1;
  }
} {1 2}