# 2007 Sep 12

 #

 # 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 is to test that ticket #2643 has been fixed.

 #

 # $Id: tkt2643.test,v 1.1 2007/09/13 17:54:41 drh Exp $

 #

 # The problem in ticket #2643 has to do with the query optimizer

 # making bad assumptions about index cost when data from ANALYZE

 # is available.

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 do_test tkt2643-1.1 {

   execsql {

     CREATE TABLE t1(a INTEGER PRIMARY KEY, b UNIQUE, c);

     INSERT INTO t1 VALUES(1,2,3);

     INSERT INTO t1 VALUES(2,3,4);

     ANALYZE;

   }

   db close

   sqlite3 db test.db

   execsql {

     CREATE INDEX i1 ON t1(c);

     SELECT count(*) FROM t1 WHERE c IS NOT NULL

   }

 } {2}

 finish_test