# 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}