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2016-03-09
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| 15:14 | Add another test case for bug [5e3c8867]. (check-in: d91e57e49f user: dan tags: trunk) | |
| 15:09 | • Fixed ticket [5e3c8867]: Correlated subquery on the RHS of an IN operator plus 5 other changes (artifact: f54cb73523 user: drh) | |
| 15:09 | When optimizing expressions of the form "x IN (SELECT ...)" make sure that the subquery is not correlated. Fix for ticket [5e3c886796e5512]. (check-in: 1ed6b06ea3 user: drh tags: trunk) | |
| 14:48 | • New ticket [5e3c8867] Correlated subquery on the RHS of an IN operator. (artifact: ada44cb008 user: drh) | |
| Ticket Hash: | 5e3c886796e5512e9d884c269945e308100cbc6a | ||
| Title: | Correlated subquery on the RHS of an IN operator | ||
| Status: | Fixed | Type: | Code_Defect |
| Severity: | Severe | Priority: | Immediate |
| Subsystem: | Unknown | Resolution: | Fixed |
| Last Modified: | 2016-03-09 15:09:32 | ||
| Version Found In: | 3.11.1 | ||
| User Comments: | ||||
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drh added on 2016-03-09 14:48:30:
The following SQL generates a single row of output where it should generate an empty set: CREATE TABLE t1(a INTEGER PRIMARY KEY); INSERT INTO t1(a) VALUES(1),(2); CREATE TABLE t2(b INTEGER PRIMARY KEY); INSERT INTO t2(b) VALUES(1); SELECT a FROM t1 WHERE a NOT IN (SELECT a FROM t2); Apparently, the subquery "(SELECT a FROM t2)" is being compiled as if it where "(SELECT b FROM t2)". This problem appears to go back to before version 3.6.1, circa 2008. Problem reported at stackoverflow and relayed to the sqlite-users mailing list by Clemens Ladisch. | ||||