# 2007 June 8

#

# 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 file is testing NULL comparisons in the WHERE clause.

# See ticket #2404.

#

# $Id: where5.test,v 1.2 2007/06/08 08:43:10 drh Exp $

set testdir [file dirname $argv0]

source $testdir/tester.tcl

# Build some test data

#

do_test where5-1.0 {

  execsql {

    CREATE TABLE t1(x TEXT);

    CREATE TABLE t2(x INTEGER);

    CREATE TABLE t3(x INTEGER PRIMARY KEY);

    INSERT INTO t1 VALUES(-1);

    INSERT INTO t1 VALUES(0);

    INSERT INTO t1 VALUES(1);

    INSERT INTO t2 SELECT * FROM t1;

    INSERT INTO t3 SELECT * FROM t2;

  }

  execsql {

    SELECT * FROM t1 WHERE x<0

  }

} {-1}

do_test where5-1.1 {

  execsql {

    SELECT * FROM t1 WHERE x<=0

  }

} {-1 0}

do_test where5-1.2 {

  execsql {

    SELECT * FROM t1 WHERE x=0

  }

} {0}

do_test where5-1.3 {

  execsql {

    SELECT * FROM t1 WHERE x>=0

  }

} {0 1}

do_test where5-1.4 {

  execsql {

    SELECT * FROM t1 WHERE x>0

  }

} {1}

do_test where5-1.5 {

  execsql {

    SELECT * FROM t1 WHERE x<>0

  }

} {-1 1}

do_test where5-1.6 {

  execsql {

    SELECT * FROM t1 WHERE x<NULL

  }

} {}

do_test where5-1.7 {

  execsql {

    SELECT * FROM t1 WHERE x<=NULL

  }

} {}

do_test where5-1.8 {

  execsql {

    SELECT * FROM t1 WHERE x=NULL

  }

} {}

do_test where5-1.9 {

  execsql {

    SELECT * FROM t1 WHERE x>=NULL

  }

} {}

do_test where5-1.10 {

  execsql {

    SELECT * FROM t1 WHERE x>NULL

  }

} {}

do_test where5-1.11 {

  execsql {

    SELECT * FROM t1 WHERE x!=NULL

  }

} {}

do_test where5-1.12 {

  execsql {

    SELECT * FROM t1 WHERE x IS NULL

  }

} {}

do_test where5-1.13 {

  execsql {

    SELECT * FROM t1 WHERE x IS NOT NULL

  }

} {-1 0 1}

do_test where5-2.0 {

  execsql {

    SELECT * FROM t2 WHERE x<0

  }

} {-1}

do_test where5-2.1 {

  execsql {

    SELECT * FROM t2 WHERE x<=0

  }

} {-1 0}

do_test where5-2.2 {

  execsql {

    SELECT * FROM t2 WHERE x=0

  }

} {0}

do_test where5-2.3 {

  execsql {

    SELECT * FROM t2 WHERE x>=0

  }

} {0 1}

do_test where5-2.4 {

  execsql {

    SELECT * FROM t2 WHERE x>0

  }

} {1}

do_test where5-2.5 {

  execsql {

    SELECT * FROM t2 WHERE x<>0

  }

} {-1 1}

do_test where5-2.6 {

  execsql {

    SELECT * FROM t2 WHERE x<NULL

  }

} {}

do_test where5-2.7 {

  execsql {

    SELECT * FROM t2 WHERE x<=NULL

  }

} {}

do_test where5-2.8 {

  execsql {

    SELECT * FROM t2 WHERE x=NULL

  }

} {}

do_test where5-2.9 {

  execsql {

    SELECT * FROM t2 WHERE x>=NULL

  }

} {}

do_test where5-2.10 {

  execsql {

    SELECT * FROM t2 WHERE x>NULL

  }

} {}

do_test where5-2.11 {

  execsql {

    SELECT * FROM t2 WHERE x!=NULL

  }

} {}

do_test where5-2.12 {

  execsql {

    SELECT * FROM t2 WHERE x IS NULL

  }

} {}

do_test where5-2.13 {

  execsql {

    SELECT * FROM t2 WHERE x IS NOT NULL

  }

} {-1 0 1}

do_test where5-3.0 {

  execsql {

    SELECT * FROM t3 WHERE x<0

  }

} {-1}

do_test where5-3.1 {

  execsql {

    SELECT * FROM t3 WHERE x<=0

  }

} {-1 0}

do_test where5-3.2 {

  execsql {

    SELECT * FROM t3 WHERE x=0

  }

} {0}

do_test where5-3.3 {

  execsql {

    SELECT * FROM t3 WHERE x>=0

  }

} {0 1}

do_test where5-3.4 {

  execsql {

    SELECT * FROM t3 WHERE x>0

  }

} {1}

do_test where5-3.5 {

  execsql {

    SELECT * FROM t3 WHERE x<>0

  }

} {-1 1}

do_test where5-3.6 {

  execsql {

    SELECT * FROM t3 WHERE x<NULL

  }

} {}

do_test where5-3.7 {

  execsql {

    SELECT * FROM t3 WHERE x<=NULL

  }

} {}

do_test where5-3.8 {

  execsql {

    SELECT * FROM t3 WHERE x=NULL

  }

} {}

do_test where5-3.9 {

  execsql {

    SELECT * FROM t3 WHERE x>=NULL

  }

} {}

do_test where5-3.10 {

  execsql {

    SELECT * FROM t3 WHERE x>NULL

  }

} {}

do_test where5-3.11 {

  execsql {

    SELECT * FROM t3 WHERE x!=NULL

  }

} {}

do_test where5-3.12 {

  execsql {

    SELECT * FROM t3 WHERE x IS NULL

  }

} {}

do_test where5-3.13 {

  execsql {

    SELECT * FROM t3 WHERE x IS NOT NULL

  }

} {-1 0 1}

do_test where5-4.0 {

  execsql {

    SELECT x<NULL FROM t3

  }

} {{} {} {}}

do_test where5-4.1 {

  execsql {

    SELECT x<=NULL FROM t3

  }

} {{} {} {}}

do_test where5-4.2 {

  execsql {

    SELECT x==NULL FROM t3

  }

} {{} {} {}}

do_test where5-4.3 {

  execsql {

    SELECT x>NULL FROM t3

  }

} {{} {} {}}

do_test where5-4.4 {

  execsql {

    SELECT x>=NULL FROM t3

  }

} {{} {} {}}

do_test where5-4.5 {

  execsql {

    SELECT x!=NULL FROM t3

  }

} {{} {} {}}

do_test where5-4.6 {

  execsql {

    SELECT x IS NULL FROM t3

  }

} {0 0 0}

do_test where5-4.7 {

  execsql {

    SELECT x IS NOT NULL FROM t3

  }

} {1 1 1}

finish_test