| Ticket Hash: | 8c63ff0eca81a9132d8d67b31cd6ae9712a2cc6f | |||
| Title: | Incorrect query result on a UNION ALL | |||
| Status: | Fixed | Type: | Code_Defect | |
| Severity: | Severe | Priority: | Immediate | |
| Subsystem: | Unknown | Resolution: | Fixed | |
| Last Modified: | 2014-02-25 21:56:00 | |||
| Version Found In: | 3.8.3.1 | |||
| User Comments: | ||||
drh added on 2014-02-25 18:46:01:
(text/x-fossil-wiki)
Temp registers can sometimes be used in concurrent co-routines, resulting in a incorrect answer. The attached script demonstrations one manifestation of this. The attachment fails with any check-in after the introduction of the NGQP. But the register allocation problem predates that change. The cut-over of the NGQP only makes the attached test case work. Probably other test cases can be made to fail for versions prior to the NGQP. | ||||
Attachments:
- b2.txt [download] added by drh on 2014-02-25 18:46:49. [details]