# 2008 August 26

#

# 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 bug #3334 has been fixed by the

# addition of restriction (19) to the subquery flattener optimization.

#

# $Id: tkt3334.test,v 1.1 2008/08/26 12:56:14 drh Exp $

set testdir [file dirname $argv0]

source $testdir/tester.tcl

do_test tkt3334-1.0 {

  execsql {

    CREATE TABLE t1(a,b);

    INSERT INTO t1 VALUES(1,934);

    INSERT INTO t1 VALUES(2,221);

    INSERT INTO t1 VALUES(1,372);

    INSERT INTO t1 VALUES(3,552);

    INSERT INTO t1 VALUES(1,719);

    INSERT INTO t1 VALUES(4,102);

    SELECT * FROM t1 ORDER BY b;

  }

} {4 102 2 221 1 372 3 552 1 719 1 934}

do_test tkt3334-1.1 {

  execsql {

    SELECT a FROM (SELECT a FROM t1 ORDER BY b LIMIT 2) WHERE a=1;

  }

} {}

do_test tkt3334-1.2 {

  execsql {

    SELECT count(*) FROM (SELECT a FROM t1 ORDER BY b LIMIT 2) WHERE a=1;

  }

} {0}

do_test tkt3334-1.3 {

  execsql {

    SELECT a FROM (SELECT a FROM t1 ORDER BY b LIMIT 3) WHERE a=1;

  }

} {1}

do_test tkt3334-1.4 {

  execsql {

    SELECT count(*) FROM (SELECT a FROM t1 ORDER BY b LIMIT 3) WHERE a=1;

  }

} {1}

do_test tkt3334-1.5 {

  execsql {

    SELECT a FROM (SELECT a FROM t1 ORDER BY b LIMIT 99) WHERE a=1;

  }

} {1 1 1}

do_test tkt3334-1.6 {

  execsql {

    SELECT count(*) FROM (SELECT a FROM t1 ORDER BY b LIMIT 99) WHERE a=1;

  }

} {3}

do_test tkt3334-1.7 {

  execsql {

    SELECT a FROM (SELECT a FROM t1 ORDER BY b) WHERE a=1;

  }

} {1 1 1}

do_test tkt3334-1.8 {

  execsql {

    SELECT count(*) FROM (SELECT a FROM t1 ORDER BY b) WHERE a=1;

  }

} {3}

do_test tkt3334-1.9 {

  execsql {

    SELECT a FROM (SELECT a FROM t1) WHERE a=1;

  }

} {1 1 1}

do_test tkt3334-1.10 {

  execsql {

    SELECT count(*) FROM (SELECT a FROM t1) WHERE a=1;

  }

} {3}