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Avoid performing aggregate processing more than once for a single expression. [forum:/info/36ff78b2a3|Forum post 36ff78b2a3].

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dan
2023-05-23 17:35:18 +00:00
parent ddf6b27579
commit 583a5cf5d2
4 changed files with 36 additions and 9 deletions
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26
test/upfrom4.test
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@ -127,4 +127,30 @@ do_execsql_test 400 {
1000 - - -
}
# Forum post https://sqlite.org/forum/forumpost/36ff78b2a3
#
ifcapable update_delete_limit {
reset_db
do_execsql_test 500 {
CREATE TABLE t1(abc INT, def INT);
INSERT INTO t1 VALUES(0,0);
INSERT INTO t1 VALUES(0,0);
INSERT INTO t1 VALUES(0,0);
CREATE TABLE dual(dummy TEXT);
INSERT INTO dual(dummy) VALUES('X');
} {}
do_execsql_test 510 {
UPDATE t1
SET (abc, def)=(SELECT x, 123)
FROM dual LEFT JOIN (SELECT 789 AS 'x' FROM dual) AS d2
LIMIT 2
}
do_execsql_test 520 {
SELECT * FROM t1
} {789 123 789 123 0 0}
}
finish_test