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Follow-up to the previous: The same optimization suppression needs to

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happen if the left-hand side is coming from a LEFT JOIN.

FossilOrigin-Name: cf5b37b3a39013d8ca9de92da2289346caf52b56daff59e19b140cc586a3421f
This commit is contained in:
drh
2025-05-30 22:58:09 +00:00
parent dd16539e71
commit d930d7ef14
4 changed files with 27 additions and 14 deletions
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22
test/join.test
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@ -1316,20 +1316,30 @@ do_execsql_test join-31.1 {
CREATE TABLE t1(c0 INT , c1 INT); INSERT INTO t1(c0, c1) VALUES(NULL,11);
CREATE TABLE t2(c0 INT NOT NULL);
CREATE TABLE t2n(c0 INT);
CREATE TABLE t3(x INT); INSERT INTO t3(x) VALUES(4);
CREATE TABLE t5(c0 INT, x INT); INSERT INTO t5 VALUES(NULL, 4);
CREATE TABLE t3(x INT); INSERT INTO t3(x) VALUES(3);
CREATE TABLE t4(y INT); INSERT INTO t4(y) VALUES(4);
CREATE TABLE t5(c0 INT, x INT); INSERT INTO t5 VALUES(NULL, 5);
}
do_execsql_test join-31.2 {
SELECT * FROM t2 RIGHT JOIN t3 ON true LEFT JOIN t1 USING(c0);
} {NULL 4 NULL}
} {NULL 3 NULL}
do_execsql_test join-31.3 {
SELECT * FROM t2 RIGHT JOIN t3 ON true NATURAL LEFT JOIN t1;
} {NULL 4 NULL}
} {NULL 3 NULL}
do_execsql_test join-31.4 {
SELECT * FROM t2n RIGHT JOIN t3 ON true LEFT JOIN t1 USING(c0);
} {NULL 4 NULL}
} {NULL 3 NULL}
do_execsql_test join-31.5 {
SELECT * FROM t5 LEFT JOIN t1 USING(c0);
} {NULL 4 NULL}
} {NULL 5 NULL}
do_execsql_test join-31.6 {
SELECT * FROM t3 LEFT JOIN t2 ON true LEFT JOIN t1 USING(c0);
} {3 NULL NULL}
do_execsql_test join-31.7 {
SELECT * FROM t3 LEFT JOIN t2 ON true NATURAL LEFT JOIN t1;
} {3 NULL NULL}
do_execsql_test join-31.8 {
SELECT * FROM t3 LEFT JOIN t2 ON true JOIN t4 ON true NATURAL LEFT JOIN t1;
} {3 NULL 4 NULL}
finish_test