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Make sure the omit-noop-left-join optimization is not applied if columns

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of the LEFT JOIN are used in the ORDER BY clause.  
Ticket [be84e357c035]

FossilOrigin-Name: 0303d6bc7112e6f810ae1bd75cafc5ffc51f5212
This commit is contained in:
drh
2013-09-03 14:03:47 +00:00
parent 05db3c7743
commit 67a5ec7b54
4 changed files with 38 additions and 9 deletions
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29
test/where.test
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@ -1304,4 +1304,33 @@ do_test where-17.5 {
}
} {42 1 43 1}
# Ticket [be84e357c035d068135f20bcfe82761bbf95006b] 2013-09-03
# Segfault during query involving LEFT JOIN column in the ORDER BY clause.
#
do_execsql_test where-18.1 {
CREATE TABLE t181(a);
CREATE TABLE t182(b,c);
INSERT INTO t181 VALUES(1);
SELECT DISTINCT a FROM t181 LEFT JOIN t182 ON a=b ORDER BY c IS NULL;
} {1}
do_execsql_test where-18.2 {
SELECT DISTINCT a FROM t181 LEFT JOIN t182 ON a=b ORDER BY +c;
} {1}
do_execsql_test where-18.3 {
SELECT DISTINCT a FROM t181 LEFT JOIN t182 ON a=b ORDER BY c;
} {1}
do_execsql_test where-18.4 {
INSERT INTO t181 VALUES(1),(1),(1),(1);
SELECT DISTINCT a FROM t181 LEFT JOIN t182 ON a=b ORDER BY +c;
} {1}
do_execsql_test where-18.5 {
INSERT INTO t181 VALUES(2);
SELECT DISTINCT a FROM t181 LEFT JOIN t182 ON a=b ORDER BY c IS NULL, +a;
} {1 2}
do_execsql_test where-18.6 {
INSERT INTO t181 VALUES(2);
SELECT DISTINCT a FROM t181 LEFT JOIN t182 ON a=b ORDER BY +a, +c IS NULL;
} {1 2}
finish_test