sl@0: # 2007 Sep 12
sl@0: #
sl@0: # The author disclaims copyright to this source code. In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: #
sl@0: # This file is to test that ticket #2643 has been fixed.
sl@0: #
sl@0: # $Id: tkt2643.test,v 1.1 2007/09/13 17:54:41 drh Exp $
sl@0: #
sl@0: 
sl@0: # The problem in ticket #2643 has to do with the query optimizer
sl@0: # making bad assumptions about index cost when data from ANALYZE
sl@0: # is available.
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: do_test tkt2643-1.1 {
sl@0:   execsql {
sl@0:     CREATE TABLE t1(a INTEGER PRIMARY KEY, b UNIQUE, c);
sl@0:     INSERT INTO t1 VALUES(1,2,3);
sl@0:     INSERT INTO t1 VALUES(2,3,4);
sl@0:     ANALYZE;
sl@0:   }
sl@0:   db close
sl@0:   sqlite3 db test.db
sl@0:   execsql {
sl@0:     CREATE INDEX i1 ON t1(c);
sl@0:     SELECT count(*) FROM t1 WHERE c IS NOT NULL
sl@0:   }
sl@0: } {2}
sl@0: 
sl@0: finish_test