# 2005 August 24
#
# 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.  The
# focus of this script is a test of the DELETE command.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix delete4

do_execsql_test 1.1 {
  CREATE TABLE t1(x INTEGER PRIMARY KEY, y);
  INSERT INTO t1 VALUES(1, 0);
  INSERT INTO t1 VALUES(2, 1);
  INSERT INTO t1 VALUES(3, 0);
  INSERT INTO t1 VALUES(4, 1);
  INSERT INTO t1 VALUES(5, 0);
  INSERT INTO t1 VALUES(6, 1);
  INSERT INTO t1 VALUES(7, 0);
  INSERT INTO t1 VALUES(8, 1);
}
do_execsql_test 1.2 {
  DELETE FROM t1 WHERE y=1;
}
do_execsql_test 1.3 {
  SELECT x FROM t1;
} {1 3 5 7}

#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 2.1 {
  CREATE TABLE t1(x INTEGER PRIMARY KEY, y, z);
  INSERT INTO t1 VALUES(1, 0, randomblob(200));
  INSERT INTO t1 VALUES(2, 1, randomblob(200));
  INSERT INTO t1 VALUES(3, 0, randomblob(200));
  INSERT INTO t1 VALUES(4, 1, randomblob(200));
  INSERT INTO t1 VALUES(5, 0, randomblob(200));
  INSERT INTO t1 VALUES(6, 1, randomblob(200));
  INSERT INTO t1 VALUES(7, 0, randomblob(200));
  INSERT INTO t1 VALUES(8, 1, randomblob(200));
}
do_execsql_test 2.2 {
  DELETE FROM t1 WHERE y=1;
}
do_execsql_test 2.3 {
  SELECT x FROM t1;
} {1 3 5 7}


#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 3.1 {
  CREATE TABLE t1(a, b, PRIMARY KEY(a, b)) WITHOUT ROWID;
  INSERT INTO t1 VALUES(1, 2);
  INSERT INTO t1 VALUES(2, 4);
  INSERT INTO t1 VALUES(1, 5);
  DELETE FROM t1 WHERE a=1;
  SELECT * FROM t1;
} {2 4}

#-------------------------------------------------------------------------
# DELETE statement that uses the OR optimization
#
reset_db
do_execsql_test 3.1 {
  CREATE TABLE t1(i INTEGER PRIMARY KEY, a, b);
  CREATE INDEX i1a ON t1(a);
  CREATE INDEX i1b ON t1(b);
  INSERT INTO t1 VALUES(1, 'one', 'i');
  INSERT INTO t1 VALUES(2, 'two', 'ii');
  INSERT INTO t1 VALUES(3, 'three', 'iii');
  INSERT INTO t1 VALUES(4, 'four', 'iv');
  INSERT INTO t1 VALUES(5, 'one', 'i');
  INSERT INTO t1 VALUES(6, 'two', 'ii');
  INSERT INTO t1 VALUES(7, 'three', 'iii');
  INSERT INTO t1 VALUES(8, 'four', 'iv');
} {}

do_execsql_test 3.2 {
  DELETE FROM t1 WHERE a='two' OR b='iv';
}

do_execsql_test 3.3 {
  SELECT i FROM t1 ORDER BY i;
} {1 3 5 7}

do_execsql_test 3.4 { 
  PRAGMA integrity_check; 
} {ok}


finish_test