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test/tkt2643.test
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1005 B
drh
Fix incorrect index cost assumptions that occur after an ANALYZE.
13 сен 2007, 21:54
13 сен 2007, 21:54
8e70e34
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# 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