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| 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 | |
| 24 set testdir [file dirname $argv0] | |
| 25 source $testdir/tester.tcl | |
| 26 | |
| 27 do_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 | |
| 39 finish_test | |
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