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Do not attempt the exists-to-join optimization for expressions from the ON clause of joins.

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dan
2024-06-12 17:01:00 +00:00
parent ddc62664bf
commit 0d92e66dfc
4 changed files with 31 additions and 10 deletions
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17
test/existsexpr.test
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@ -404,6 +404,23 @@ do_catchsql_test 6.1 {
SELECT a FROM t1 WHERE EXISTS (SELECT 1 FROM t2 WHERE c COLLATE f = a)
} {1 {no such collation sequence: f}}
#-------------------------------------------------------------------------
reset_db
do_execsql_test 7.0 {
CREATE TABLE t1(x);
CREATE TABLE t2(y UNIQUE);
INSERT INTO t1 VALUES(1), (2);
INSERT INTO t2 VALUES(1), (3);
SELECT * FROM t1 one LEFT JOIN t1 two ON (one.x=two.x AND EXISTS (
SELECT 1 FROM t2 WHERE y=one.x
));
} {
1 1
2 {}
}
finish_test