89 lines
2.2 KiB
Plaintext
89 lines
2.2 KiB
Plaintext
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# 2009 April 24
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# Ticket #3824
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#
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# When you use an "IS NULL" constraint on a UNIQUE index, the result
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# is not necessarily UNIQUE. Make sure the optimizer does not assume
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# uniqueness.
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#
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# $Id: tkt3824.test,v 1.1 2009/04/24 14:51:42 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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proc execsql_status {sql {db db}} {
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set result [uplevel $db eval [list $sql]]
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if {[db status sort]} {
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concat $result sort
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} else {
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concat $result nosort
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}
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}
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do_test tkt3824-1.1 {
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db eval {
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CREATE TABLE t1(a,b);
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INSERT INTO t1 VALUES(1,NULL);
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INSERT INTO t1 VALUES(9,NULL);
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INSERT INTO t1 VALUES(5,NULL);
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INSERT INTO t1 VALUES(123,NULL);
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INSERT INTO t1 VALUES(-10,NULL);
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CREATE UNIQUE INDEX t1b ON t1(b);
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}
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execsql_status {
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SELECT a FROM t1 WHERE b IS NULL ORDER BY a;
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}
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} {-10 1 5 9 123 sort}
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do_test tkt3824-1.2 {
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execsql_status {
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SELECT a FROM t1 WHERE b IS NULL ORDER BY b, a;
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}
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} {-10 1 5 9 123 sort}
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do_test tkt3824-2.1 {
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db eval {
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CREATE TABLE t2(a,b,c);
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INSERT INTO t2 VALUES(1,1,NULL);
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INSERT INTO t2 VALUES(9,2,NULL);
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INSERT INTO t2 VALUES(5,2,NULL);
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INSERT INTO t2 VALUES(123,3,NULL);
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INSERT INTO t2 VALUES(-10,3,NULL);
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CREATE UNIQUE INDEX t2bc ON t2(b,c);
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}
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execsql_status {
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SELECT a FROM t2 WHERE b=2 AND c IS NULL ORDER BY a;
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}
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} {5 9 sort}
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do_test tkt3824-2.2 {
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execsql_status {
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SELECT a FROM t2 WHERE b=2 AND c IS NULL ORDER BY b, a;
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}
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} {5 9 sort}
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do_test tkt3824-2.3 {
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lsort [execsql_status {
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SELECT a FROM t2 WHERE b=2 AND c IS NULL ORDER BY b;
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}]
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} {5 9 sort}
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do_test tkt3824-3.1 {
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db eval {
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CREATE TABLE t3(x,y);
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INSERT INTO t3 SELECT a, b FROM t1;
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INSERT INTO t3 VALUES(234,567);
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CREATE UNIQUE INDEX t3y ON t3(y);
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DELETE FROM t3 WHERE y IS NULL;
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SELECT * FROM t3;
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}
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} {234 567}
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finish_test
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