| Bug #8164 | subquery with INFORMATION_SCHEMA.COLUMNS, 100 % CPU | ||
|---|---|---|---|
| Submitted: | 27 Jan 2005 14:25 | Modified: | 4 Mar 2005 16:20 |
| Reporter: | Matthias Leich | Email Updates: | |
| Status: | Closed | Impact on me: | |
| Category: | MySQL Server | Severity: | S2 (Serious) |
| Version: | 5.0 | OS: | |
| Assigned to: | Sergei Glukhov | CPU Architecture: | Any |
[27 Jan 2005 14:27]
Matthias Leich
test case with some statement variations
Attachment: ML1.test (application/test, text), 1.21 KiB.
[27 Jan 2005 14:42]
Matthias Leich
INFORMATION_SCHEMA.TABLES shows the same bad properties like INFORMATION_SCHEMA.COLUMNS
[30 Jan 2005 14:50]
Dean Ellis
Verified against 5.0.3. Lockup occurs if test is execute within a database. Without an active database: ERROR 1194 (HY000): Table 'B' is marked as crashed and should be repaired
[24 Feb 2005 9:01]
Alexander Barkov
Ok to push after extendint the test. See internal info.
[3 Mar 2005 15:06]
Bugs System
A patch for this bug has been committed. After review, it may be pushed to the relevant source trees for release in the next version. You can access the patch from: http://lists.mysql.com/internals/22619
[4 Mar 2005 16:20]
Paul DuBois
Noted in 5.0.3 changelog.
Description: I have a test case derived from the NIST data dictionary tests, which causes 100 % CPU endless loop. It is a simple subquery containing INFORMATION_SCHEMA.COLUMNS. Please have a look into the attached test case. BTW: I assume that this bug is is not harmless, because - many common data dictionary views use subqueries - some customers like to program their own data dictionary based on the DD provided by the DBMs (They will need subqueries.) My environment: - Intel PC with Linux(SuSE 9.1) - MySQL compiled from source Version 5.0 ChangeSet@1.1824, 2005-01-26 How to repeat: Please use my test file ML1.test , copy it to mysql-test/t ./mysql-test-run ML1