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Diffstat (limited to 'test/tkt2643.test')
| -rw-r--r-- | test/tkt2643.test | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/test/tkt2643.test b/test/tkt2643.test new file mode 100644 index 0000000..5c58863 --- /dev/null +++ b/test/tkt2643.test @@ -0,0 +1,39 @@ +# 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 |