3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #***********************************************************************
12 # This file is to test that ticket #2643 has been fixed.
14 # $Id: tkt2643.test,v 1.1 2007/09/13 17:54:41 drh Exp $
17 # The problem in ticket #2643 has to do with the query optimizer
18 # making bad assumptions about index cost when data from ANALYZE
21 set testdir [file dirname $argv0]
22 source $testdir/tester.tcl
26 CREATE TABLE t1(a INTEGER PRIMARY KEY, b UNIQUE, c);
27 INSERT INTO t1 VALUES(1,2,3);
28 INSERT INTO t1 VALUES(2,3,4);
34 CREATE INDEX i1 ON t1(c);
35 SELECT count(*) FROM t1 WHERE c IS NOT NULL