1# 2011 October 13 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# This file implements regression tests for SQLite library. Specifically, 12# it tests that ticket [fa7bf5ec94801e7e2030e41eefe5d9dd96eaacfd] has 13# been resolved. 14# 15# The problem described by this ticket was that the sqlite3ExprCompare() 16# function was saying that expressions (x='a') and (x='A') were identical 17# because it was using sqlite3StrICmp() instead of strcmp() to compare string 18# literals. That was causing the query optimizer for aggregate queries to 19# believe that both count() operations were identical, and thus only 20# computing the first count() and making a copy of the result for the 21# second count(). 22# 23 24set testdir [file dirname $argv0] 25source $testdir/tester.tcl 26 27do_test tkt-fa7bf5ec-1 { 28 execsql { 29 CREATE TABLE t1(x); 30 INSERT INTO t1 VALUES ('a'); 31 INSERT INTO t1 VALUES ('A'); 32 INSERT INTO t1 VALUES ('A'); 33 SELECT count(CASE WHEN x='a' THEN 1 END), 34 count(CASE WHEN x='A' THEN 1 END) 35 FROM t1; 36 } 37} {1 2} 38 39finish_test 40