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Fix an obscure problem with the join-strength-reduction optimization that could occur when mixing LEFT and RIGHT joins in the same query. [forum:/forumpost/7f74ce0bee|Forum post 7f74ce0bee].

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FossilOrigin-Name: 530d10e93a5f63b71aaa94a2b89102d012a2cda815997066beb0f585fe823536
This commit is contained in:
dan
2023-11-10 15:03:18 +00:00
parent 9d60c3c256
commit 0eed27d38b
4 changed files with 51 additions and 12 deletions
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40
test/joinH.test
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@ -250,5 +250,45 @@ do_catchsql_test 9.11 {
SELECT oid FROM wo2 JOIN (wo3 JOIN x3)
} {0 99}
reset_db
do_execsql_test 10.0 {
CREATE TABLE rt0 (c0 INTEGER, c1 INTEGER, c2 INTEGER, c3 INTEGER, c4 INTEGER);
CREATE TABLE rt3 (c3 INTEGER);
INSERT INTO rt0(c3, c1) VALUES (x'', '1');
INSERT INTO rt0(c3, c1) VALUES ('-1', -1e500);
INSERT INTO rt0(c3, c1) VALUES (1, x'');
CREATE VIEW v6(c0, c1, c2) AS SELECT 0, 0, 0;
}
do_execsql_test 10.1 {
SELECT COUNT(*) FROM rt0 LEFT JOIN rt3 JOIN v6 ON ((CASE v6.c0 WHEN rt0.c4 THEN rt3.c3 END) NOT BETWEEN (rt0.c4) AND (NULL)) WHERE (rt0.c1); -- 2
} {0}
do_execsql_test 10.2 {
SELECT COUNT(*) FROM rt0 LEFT JOIN rt3 RIGHT OUTER JOIN v6 ON ((CASE v6.c0 WHEN rt0.c4 THEN rt3.c3 END) NOT BETWEEN (rt0.c4) AND (NULL)) WHERE (rt0.c1); -- 2
} {0}
#-------------------------------------------------------------------------
do_execsql_test 11.1 {
CREATE TABLE t1(a, b);
CREATE TABLE t2(c, d);
CREATE TABLE t3(e, f);
INSERT INTO t1 VALUES(1, 1);
INSERT INTO t2 VALUES(2, 2);
INSERT INTO t3 VALUES(3, 3);
}
do_execsql_test 11.2 {
SELECT * FROM t1 LEFT JOIN t2 RIGHT JOIN t3 ON (t2.c=10)
} {{} {} {} {} 3 3}
do_execsql_test 11.3 {
SELECT * FROM t1 LEFT JOIN t2 RIGHT JOIN t3 ON (t2.c=10) WHERE t1.a=1
} {}
finish_test