# 2014 August 30
#
# 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.
#
#***********************************************************************
#

if {![info exists testdir]} {
  set testdir [file join [file dirname [info script]] .. .. test]
}
source $testdir/tester.tcl
set ::testprefix rbu1

db close
sqlite3_shutdown
sqlite3_config_uri 1

# Create a simple RBU database. That expects to write to a table:
#
#   CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
#
proc create_rbu1 {filename} {
  forcedelete $filename
  sqlite3 rbu1 $filename  
  rbu1 eval {
    CREATE TABLE data_t1(a, b, c, rbu_control);
    INSERT INTO data_t1 VALUES(1, 2, 3, 0);
    INSERT INTO data_t1 VALUES(2, 'two', 'three', 0);
    INSERT INTO data_t1 VALUES(3, NULL, 8.2, 0);
  }
  rbu1 close
  return $filename
}

# Create a simple RBU database. That expects to write to a table:
#
#   CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
#
# This RBU includes both insert and delete operations.
#
proc create_rbu4 {filename} {
  forcedelete $filename
  sqlite3 rbu1 $filename  
  rbu1 eval {
    CREATE TABLE data_t1(a, b, c, rbu_control);
    INSERT INTO data_t1 VALUES(1, 2, 3, 0);
    INSERT INTO data_t1 VALUES(2, NULL, 5, 1);
    INSERT INTO data_t1 VALUES(3, 8, 9, 0);
    INSERT INTO data_t1 VALUES(4, NULL, 11, 1);
  }
  rbu1 close
  return $filename
}
#
# Create a simple RBU database. That expects to write to a table:
#
#   CREATE TABLE t1(c, b, '(a)' INTEGER PRIMARY KEY);
#
# This RBU includes both insert and delete operations.
#
proc create_rbu4b {filename} {
  forcedelete $filename
  sqlite3 rbu1 $filename  
  rbu1 eval {
    CREATE TABLE data_t1(c, b, '(a)', rbu_control);
    INSERT INTO data_t1 VALUES(3, 2, 1, 0);
    INSERT INTO data_t1 VALUES(5, NULL, 2, 1);
    INSERT INTO data_t1 VALUES(9, 8, 3, 0);
    INSERT INTO data_t1 VALUES(11, NULL, 4, 1);
  }
  rbu1 close
  return $filename
}

# Create a simple RBU database. That expects to write to a table:
#
#   CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d);
#
# This RBU includes update statements.
#
proc create_rbu5 {filename} {
  forcedelete $filename
  sqlite3 rbu5 $filename  
  rbu5 eval {
    CREATE TABLE data_t1(a, b, c, d, rbu_control);
    INSERT INTO data_t1 VALUES(1, NULL, NULL, 5, '...x');  -- SET d = 5
    INSERT INTO data_t1 VALUES(2, NULL, 10, 5, '..xx');    -- SET c=10, d = 5
    INSERT INTO data_t1 VALUES(3, 11, NULL, NULL, '.x..'); -- SET b=11
  }
  rbu5 close
  return $filename
}

# Run the RBU in file $rbu on target database $target until completion.
#
proc run_rbu {target rbu} {
  sqlite3rbu rbu $target $rbu
  while 1 {
    set rc [rbu step]
    if {$rc!="SQLITE_OK"} break
  }
  rbu close
}

proc step_rbu {target rbu} {
  while 1 {
    sqlite3rbu rbu $target $rbu
    set rc [rbu step]
    rbu close
    if {$rc != "SQLITE_OK"} break
  }
  set rc
}

# Same as [step_rbu], except using a URI to open the target db.
#
proc step_rbu_uri {target rbu} {
  while 1 {
    sqlite3rbu rbu file:$target?xyz=&abc=123 $rbu
    set rc [rbu step]
    rbu close
    if {$rc != "SQLITE_OK"} break
  }
  set rc
}

# Same as [step_rbu], except using an external state database - "state.db"
#
proc step_rbu_state {target rbu} {
  while 1 {
    sqlite3rbu rbu $target $rbu state.db
    set rc [rbu step]
    rbu close
    if {$rc != "SQLITE_OK"} break
  }
  set rc
}

proc dbfilecksum {file} {
  sqlite3 ck $file
  set cksum [dbcksum ck main]
  ck close
  set cksum
}

foreach {tn3 create_vfs destroy_vfs} {
  1 {} {}
  2 {
    sqlite3rbu_create_vfs -default myrbu ""
  } {
    sqlite3rbu_destroy_vfs myrbu
  }
} {

  eval $create_vfs

  foreach {tn2 cmd} {
      1 run_rbu 
      2 step_rbu 3 step_rbu_uri 4 step_rbu_state
  } {
    foreach {tn schema} {
      1 {
        CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
      }
      2 { 
        CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
        CREATE INDEX i1 ON t1(b);
      }
      3 { 
        CREATE TABLE t1(a PRIMARY KEY, b, c) WITHOUT ROWID;
      }
      4 { 
        CREATE TABLE t1(a PRIMARY KEY, b, c) WITHOUT ROWID;
        CREATE INDEX i1 ON t1(b);
      }
      5 { 
        CREATE TABLE t1(a, b, c, PRIMARY KEY(a, c)) WITHOUT ROWID;
        CREATE INDEX i1 ON t1(b);
      }
      6 { 
        CREATE TABLE t1(a, b, c, PRIMARY KEY(c)) WITHOUT ROWID;
        CREATE INDEX i1 ON t1(b, a);
      }
      7 { 
        CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
        CREATE INDEX i1 ON t1(b, c);
        CREATE INDEX i2 ON t1(c, b);
        CREATE INDEX i3 ON t1(a, b, c, a, b, c);
      }

      8 { 
        CREATE TABLE t1(a PRIMARY KEY, b, c);
        CREATE INDEX i1 ON t1(b, c);
        CREATE INDEX i2 ON t1(c, b);
        CREATE INDEX i3 ON t1(a, b, c, a, b, c);
      }

      9 { 
        CREATE TABLE t1(a, b, c, PRIMARY KEY(a, c));
        CREATE INDEX i1 ON t1(b);
      }

      10 { 
        CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
        CREATE INDEX i1 ON t1(b DESC);
      }

      11 { 
        CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
        CREATE INDEX i1 ON t1(b DESC, a ASC, c DESC);
      }

      12 { 
        CREATE TABLE t1(a INT PRIMARY KEY DESC, b, c) WITHOUT ROWID; 
      }

      13 { 
        CREATE TABLE t1(a INT, b, c, PRIMARY KEY(a DESC)) WITHOUT ROWID; 
      }

      14 { 
        CREATE TABLE t1(a, b, c, PRIMARY KEY(a DESC, c)) WITHOUT ROWID;
        CREATE INDEX i1 ON t1(b);
      }

      15 { 
        CREATE TABLE t1(a, b, c, PRIMARY KEY(a, c DESC)) WITHOUT ROWID;
        CREATE INDEX i1 ON t1(b);
      }

      16 { 
        CREATE TABLE t1(a, b, c, PRIMARY KEY(c DESC, a)) WITHOUT ROWID;
        CREATE INDEX i1 ON t1(b DESC, c, a);
      }
    } {
      reset_db
      execsql $schema
      create_rbu1 rbu.db
      set check [dbfilecksum rbu.db]
      forcedelete state.db

      do_test $tn3.1.$tn2.$tn.1 {
        $cmd test.db rbu.db
      } {SQLITE_DONE}

      do_execsql_test $tn3.1.$tn2.$tn.2 { SELECT * FROM t1 ORDER BY a ASC } {
        1 2 3 
        2 two three 
        3 {} 8.2
      }
      do_execsql_test $tn3.1.$tn2.$tn.3 { SELECT * FROM t1 ORDER BY b ASC } {
        3 {} 8.2
        1 2 3 
        2 two three 
      }
      do_execsql_test $tn3.1.$tn2.$tn.4 { SELECT * FROM t1 ORDER BY c ASC } {
        1 2 3 
        3 {} 8.2
        2 two three 
      }
   
      do_execsql_test $tn3.1.$tn2.$tn.5 { PRAGMA integrity_check } ok

      if {$cmd=="step_rbu_state"} {
        do_test $tn3.1.$tn2.$tn.6 { file exists state.db } 1
        do_test $tn3.1.$tn2.$tn.7 { expr {$check == [dbfilecksum rbu.db]} } 1
      } else {
        do_test $tn3.1.$tn2.$tn.8 { file exists state.db } 0
        do_test $tn3.1.$tn2.$tn.9 { expr {$check == [dbfilecksum rbu.db]} } 0
      }
    }
  }

  #-------------------------------------------------------------------------
  # Check that an RBU cannot be applied to a table that has no PK.
  #
  # UPDATE: At one point RBU required that all tables featured either
  # explicit IPK columns or were declared WITHOUT ROWID. This has been
  # relaxed so that external PRIMARY KEYs on tables with automatic rowids
  # are now allowed.
  #
  # UPDATE 2: Tables without any PRIMARY KEY declaration are now allowed.
  # However the input table must feature an "rbu_rowid" column.
  #
  reset_db
  create_rbu1 rbu.db
  do_execsql_test $tn3.2.1 { CREATE TABLE t1(a, b, c) }
  do_test $tn3.2.2 {
    sqlite3rbu rbu test.db rbu.db
    rbu step
  } {SQLITE_ERROR}
  do_test $tn3.2.3 {
    list [catch { rbu close } msg] $msg
  } {1 {SQLITE_ERROR - table data_t1 requires rbu_rowid column}}
  reset_db
  do_execsql_test $tn3.2.4 { CREATE TABLE t1(a PRIMARY KEY, b, c) }
  do_test $tn3.2.5 {
    sqlite3rbu rbu test.db rbu.db
    rbu step
  } {SQLITE_OK}
  do_test $tn3.2.6 {
    list [catch { rbu close } msg] $msg
  } {0 SQLITE_OK}

  #-------------------------------------------------------------------------
  # Check that if a UNIQUE constraint is violated the current and all 
  # subsequent [rbu step] calls return SQLITE_CONSTRAINT. And that the RBU 
  # transaction is rolled back by the [rbu close] that deletes the rbu 
  # handle.
  #
  foreach {tn errcode errmsg schema} {
    1 SQLITE_CONSTRAINT "UNIQUE constraint failed: t1.a" {
      CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
      INSERT INTO t1 VALUES(3, 2, 1);
    } 

    2 SQLITE_CONSTRAINT "UNIQUE constraint failed: t1.c" {
      CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c UNIQUE);
      INSERT INTO t1 VALUES(4, 2, 'three');
    } 

    3 SQLITE_CONSTRAINT "UNIQUE constraint failed: t1.a" {
      CREATE TABLE t1(a PRIMARY KEY, b, c);
      INSERT INTO t1 VALUES(3, 2, 1);
    } 

    4 SQLITE_CONSTRAINT "UNIQUE constraint failed: t1.c" {
      CREATE TABLE t1(a PRIMARY KEY, b, c UNIQUE);
      INSERT INTO t1 VALUES(4, 2, 'three');
    } 

  } {
    reset_db
    execsql $schema
    set cksum [dbcksum db main]

    do_test $tn3.3.$tn.1 {
      create_rbu1 rbu.db
      sqlite3rbu rbu test.db rbu.db
      while {[set res [rbu step]]=="SQLITE_OK"} {}
      set res
    } $errcode

    do_test $tn3.3.$tn.2 { rbu step } $errcode

    do_test $tn3.3.$tn.3 { 
      list [catch { rbu close } msg] $msg
    } [list 1 "$errcode - $errmsg"]

    do_test $tn3.3.$tn.4 { dbcksum db main } $cksum
  }

  #-------------------------------------------------------------------------
  #
  foreach {tn2 cmd} {1 run_rbu 2 step_rbu 3 step_rbu_state } {
    foreach {tn schema} {
      1 {
        CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
      }
      2 {
        CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
        CREATE INDEX i1 ON t1(b);
      }
      3 {
        CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
        CREATE INDEX i1 ON t1(b);
        CREATE INDEX i2 ON t1(c, b);
        CREATE INDEX i3 ON t1(c, b, c);
      }
      4 {
        CREATE TABLE t1(a INT PRIMARY KEY, b, c) WITHOUT ROWID;
        CREATE INDEX i1 ON t1(b);
        CREATE INDEX i2 ON t1(c, b);
        CREATE INDEX i3 ON t1(c, b, c);
      }
      5 {
        CREATE TABLE t1(a INT PRIMARY KEY, b, c);
        CREATE INDEX i1 ON t1(b);
        CREATE INDEX i2 ON t1(c, b);
        CREATE INDEX i3 ON t1(c, b, c);
      }

      6 {
        CREATE TABLE t1(a INT PRIMARY KEY DESC, b, c);
        CREATE INDEX i1 ON t1(b DESC);
        CREATE INDEX i2 ON t1(c, b);
        CREATE INDEX i3 ON t1(c DESC, b, c);
      }
      7 {
        CREATE TABLE t1(a INT PRIMARY KEY DESC, b, c) WITHOUT ROWID;
        CREATE INDEX i1 ON t1(b);
        CREATE INDEX i2 ON t1(c, b);
        CREATE INDEX i3 ON t1(c, b, c);
      }
    } {
      reset_db
      execsql $schema
      execsql {
        INSERT INTO t1 VALUES(2, 'hello', 'world');
        INSERT INTO t1 VALUES(4, 'hello', 'planet');
        INSERT INTO t1 VALUES(6, 'hello', 'xyz');
      }

      create_rbu4 rbu.db
      set check [dbfilecksum rbu.db]
      forcedelete state.db
    
      do_test $tn3.4.$tn2.$tn.1 {
        $cmd test.db rbu.db
      } {SQLITE_DONE}
      
      do_execsql_test $tn3.4.$tn2.$tn.2 {
        SELECT * FROM t1 ORDER BY a ASC;
      } {
        1 2 3 
        3 8 9
        6 hello xyz
      }
    
      do_execsql_test $tn3.4.$tn2.$tn.3 { PRAGMA integrity_check } ok

      if {$cmd=="step_rbu_state"} {
        do_test $tn3.4.$tn2.$tn.4 { file exists state.db } 1
        do_test $tn3.4.$tn2.$tn.5 { expr {$check == [dbfilecksum rbu.db]} } 1
      } else {
        do_test $tn3.4.$tn2.$tn.6 { file exists state.db } 0
        do_test $tn3.4.$tn2.$tn.7 { expr {$check == [dbfilecksum rbu.db]} } 0
      }
    }
  }

  foreach {tn2 cmd} {1 run_rbu 2 step_rbu 3 step_rbu_state} {
    foreach {tn schema} {
      1 {
        CREATE TABLE t1(c, b, '(a)' INTEGER PRIMARY KEY);
        CREATE INDEX i1 ON t1(c, b);
      }
      2 {
        CREATE TABLE t1(c, b, '(a)' PRIMARY KEY);
      }
      3 {
        CREATE TABLE t1(c, b, '(a)' PRIMARY KEY) WITHOUT ROWID;
      }
    } {
      reset_db
      execsql $schema
      execsql {
        INSERT INTO t1('(a)', b, c) VALUES(2, 'hello', 'world');
        INSERT INTO t1('(a)', b, c) VALUES(4, 'hello', 'planet');
        INSERT INTO t1('(a)', b, c) VALUES(6, 'hello', 'xyz');
      }

      create_rbu4b rbu.db
      set check [dbfilecksum rbu.db]
      forcedelete state.db
    
      do_test $tn3.5.$tn2.$tn.1 {
        $cmd test.db rbu.db
      } {SQLITE_DONE}
      
      do_execsql_test $tn3.5.$tn2.$tn.2 {
        SELECT * FROM t1 ORDER BY "(a)" ASC;
      } {
        3 2 1
        9 8 3
        xyz hello 6
      }
    
      do_execsql_test $tn3.4.$tn2.$tn.3 { PRAGMA integrity_check } ok

      if {$cmd=="step_rbu_state"} {
        do_test $tn3.5.$tn2.$tn.4 { file exists state.db } 1
        do_test $tn3.5.$tn2.$tn.5 { expr {$check == [dbfilecksum rbu.db]} } 1
      } else {
        do_test $tn3.5.$tn2.$tn.6 { file exists state.db } 0
        do_test $tn3.5.$tn2.$tn.7 { expr {$check == [dbfilecksum rbu.db]} } 0
      }
    }
  }

  #-------------------------------------------------------------------------
  #
  foreach {tn2 cmd} {1 run_rbu 2 step_rbu 3 step_rbu_state} {
    foreach {tn schema} {
      1 {
        CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d);
      }
      2 {
        CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d);
        CREATE INDEX i1 ON t1(d);
        CREATE INDEX i2 ON t1(d, c);
        CREATE INDEX i3 ON t1(d, c, b);
        CREATE INDEX i4 ON t1(b);
        CREATE INDEX i5 ON t1(c);
        CREATE INDEX i6 ON t1(c, b);
      }
      3 {
        CREATE TABLE t1(a PRIMARY KEY, b, c, d) WITHOUT ROWID;
        CREATE INDEX i1 ON t1(d);
        CREATE INDEX i2 ON t1(d, c);
        CREATE INDEX i3 ON t1(d, c, b);
        CREATE INDEX i4 ON t1(b);
        CREATE INDEX i5 ON t1(c);
        CREATE INDEX i6 ON t1(c, b);
      }
      4 {
        CREATE TABLE t1(a PRIMARY KEY, b, c, d);
        CREATE INDEX i1 ON t1(d);
        CREATE INDEX i2 ON t1(d, c);
        CREATE INDEX i3 ON t1(d, c, b);
        CREATE INDEX i4 ON t1(b);
        CREATE INDEX i5 ON t1(c);
        CREATE INDEX i6 ON t1(c, b);
      }
    } {
      reset_db
      execsql $schema
      execsql {
        INSERT INTO t1 VALUES(1, 2, 3, 4);
        INSERT INTO t1 VALUES(2, 5, 6, 7);
        INSERT INTO t1 VALUES(3, 8, 9, 10);
      }
    
      create_rbu5 rbu.db
      set check [dbfilecksum rbu.db]
      forcedelete state.db

      do_test $tn3.5.$tn2.$tn.1 {
        $cmd test.db rbu.db
      } {SQLITE_DONE}
      
      do_execsql_test $tn3.5.$tn2.$tn.2 {
        SELECT * FROM t1 ORDER BY a ASC;
      } {
        1 2 3 5
        2 5 10 5
        3 11 9 10
      }
    
      do_execsql_test $tn3.6.$tn2.$tn.3 { PRAGMA integrity_check } ok

      if {$cmd=="step_rbu_state"} {
        do_test $tn3.6.$tn2.$tn.4 { file exists state.db } 1
        do_test $tn3.6.$tn2.$tn.5 { expr {$check == [dbfilecksum rbu.db]} } 1
      } else {
        do_test $tn3.6.$tn2.$tn.6 { file exists state.db } 0
        do_test $tn3.6.$tn2.$tn.7 { expr {$check == [dbfilecksum rbu.db]} } 0
      }
    }
  }

  #-------------------------------------------------------------------------
  # Test some error cases:
  # 
  #   * A virtual table with no rbu_rowid column.
  #   * A no-PK table with no rbu_rowid column.
  #   * A PK table with an rbu_rowid column.
  #
  #   6: An update string of the wrong length
  #
  ifcapable fts3 {
    foreach {tn schema error} {
       1 {
         CREATE TABLE t1(a, b);
         CREATE TABLE rbu.data_t1(a, b, rbu_control);
       } {SQLITE_ERROR - table data_t1 requires rbu_rowid column}
    
       2 {
         CREATE VIRTUAL TABLE t1 USING fts4(a, b);
         CREATE TABLE rbu.data_t1(a, b, rbu_control);
       } {SQLITE_ERROR - table data_t1 requires rbu_rowid column}
    
       3 {
         CREATE TABLE t1(a PRIMARY KEY, b);
         CREATE TABLE rbu.data_t1(a, b, rbu_rowid, rbu_control);
       } {SQLITE_ERROR - table data_t1 may not have rbu_rowid column}
    
       4 {
         CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
         CREATE TABLE rbu.data_t1(a, b, rbu_rowid, rbu_control);
       } {SQLITE_ERROR - table data_t1 may not have rbu_rowid column}
    
       5 {
         CREATE TABLE t1(a, b PRIMARY KEY) WITHOUT ROWID;
         CREATE TABLE rbu.data_t1(a, b, rbu_rowid, rbu_control);
       } {SQLITE_ERROR - table data_t1 may not have rbu_rowid column}

       6 {
         CREATE TABLE t1(a, b PRIMARY KEY) WITHOUT ROWID;
         CREATE TABLE rbu.data_t1(a, b, rbu_control);
         INSERT INTO rbu.data_t1 VALUES(1, 2, 'x.x');
       } {SQLITE_ERROR - invalid rbu_control value}

       7 {
         CREATE TABLE t1(a, b PRIMARY KEY) WITHOUT ROWID;
         CREATE TABLE rbu.data_t1(a, b, rbu_control);
         INSERT INTO rbu.data_t1 VALUES(1, 2, NULL);
       } {SQLITE_ERROR - invalid rbu_control value}

       8 {
         CREATE TABLE t1(a, b PRIMARY KEY) WITHOUT ROWID;
         CREATE TABLE rbu.data_t1(a, b, rbu_control);
         INSERT INTO rbu.data_t1 VALUES(1, 2, 4);
       } {SQLITE_ERROR - invalid rbu_control value}

       9 {
         CREATE TABLE t1(a, b PRIMARY KEY) WITHOUT ROWID;
         CREATE TABLE rbu.data_t1(a, b, rbu_control);
         INSERT INTO rbu.data_t1 VALUES(1, 2, 2);
       } {SQLITE_ERROR - invalid rbu_control value}

       10 {
         CREATE TABLE t2(a, b);
         CREATE TABLE rbu.data_t1(a, b, rbu_control);
         INSERT INTO rbu.data_t1 VALUES(1, 2, 2);
       } {SQLITE_ERROR - no such table: t1}

       11 {
         CREATE TABLE rbu.data_t2(a, b, rbu_control);
         INSERT INTO rbu.data_t2 VALUES(1, 2, 2);
       } {SQLITE_ERROR - no such table: t2}

    } {
      reset_db
      forcedelete rbu.db
      execsql { ATTACH 'rbu.db' AS rbu }
      execsql $schema

      do_test $tn3.7.$tn {
        list [catch { run_rbu test.db rbu.db } msg] $msg
      } [list 1 $error]
    }
  }

  # Test that an RBU database containing no input tables is handled
  # correctly.
  reset_db
  forcedelete rbu.db
  do_test $tn3.8 {
    list [catch { run_rbu test.db rbu.db } msg] $msg
  } {0 SQLITE_DONE}
  
  # Test that RBU can update indexes containing NULL values.
  #
  reset_db
  forcedelete rbu.db
  do_execsql_test $tn3.9.1 {
    CREATE TABLE t1(a PRIMARY KEY, b, c);
    CREATE INDEX i1 ON t1(b, c);
    INSERT INTO t1 VALUES(1, 1, NULL);
    INSERT INTO t1 VALUES(2, NULL, 2);
    INSERT INTO t1 VALUES(3, NULL, NULL);

    ATTACH 'rbu.db' AS rbu;
    CREATE TABLE rbu.data_t1(a, b, c, rbu_control);
    INSERT INTO data_t1 VALUES(1, NULL, NULL, 1);
    INSERT INTO data_t1 VALUES(3, NULL, NULL, 1);
  } {}

  do_test $tn3.9.2 {
    list [catch { run_rbu test.db rbu.db } msg] $msg
  } {0 SQLITE_DONE}

  do_execsql_test $tn3.9.3 {
    SELECT * FROM t1
  } {2 {} 2}
  do_execsql_test $tn3.9.4 { PRAGMA integrity_check } {ok}

  catch { db close }
  eval $destroy_vfs
}


finish_test