1# 2007 Sep 12 2# 3# The author disclaims copyright to this source code. In place of 4# a legal notice, here is a blessing: 5# 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. 9# 10#*********************************************************************** 11# 12# This file is to test that ticket #2643 has been fixed. 13# 14# $Id: tkt2643.test,v 1.1 2007/09/13 17:54:41 drh Exp $ 15# 16 17# The problem in ticket #2643 has to do with the query optimizer 18# making bad assumptions about index cost when data from ANALYZE 19# is available. 20 21set testdir [file dirname $argv0] 22source $testdir/tester.tcl 23 24do_test tkt2643-1.1 { 25 execsql { 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); 29 ANALYZE; 30 } 31 db close 32 sqlite3 db test.db 33 execsql { 34 CREATE INDEX i1 ON t1(c); 35 SELECT count(*) FROM t1 WHERE c IS NOT NULL 36 } 37} {2} 38 39finish_test 40