This page lists all bug reports that we created for MySQL, MariaDB and TiDB.

Bug List

MySQL

1. Incorrect Semi-join Execution
Links: bugtracker
Severity: S2 (Serious)
State: Verified

2. Incorrect left hash join with subquery in condition
Links: bugtracker
Severity: S2 (Serious)
State: Verified

3. Incorrect Inner hash join when transforming materialization condition
Links: bugtracker
Severity: S2 (Serious)
State: Verified

4. Incorrect nested loop antijoin when using materialization strategy
Links: bugtracker
Severity: S2 (Serious)
State: Verified

5. Incorrect inner hash join when using materialization strategy
Links: bugtracker
Severity: S2 (Serious)
State: Fixed

6. Nested Null-Safe Equal gives wrong result
Links: bugtracker
Severity: S2 (Serious)
State: Fixed

7. Semijoin may give wrong result
Links: bugtracker
Severity: S1 (Critical)
State: Fixed

8. Inner table of OUT-JOIN is nullable, after applying OUTER2INNER transformation
Links: bugtracker
Severity: S3 (Non-critical)
State: Verified

9. Item_ref in Having Clause points to invalid outer table field
Links: bugtracker
Severity: S2 (Serious)
State: Verified

10. Incorrect Left Outer Join Execution
Links: bugtracker
Severity: S1 (Critical)
State: Fixed

11. Incorrect Hash Semijoin Execution
Links: bugtracker
Severity: S1 (Critical)
State: Verified

12. Incorrect inner join with group by execution
Links: bugtracker
Severity: S2 (Serious)
State: Verified

13. Incorrect group by execution
Links: bugtracker
Severity: S1 (Critical)
State: Verified

14. Incorrect semi-join with group by execution
Links: bugtracker
Severity: S1 (Critical)
State: Verified

15. Incorrect Muti-table join with group by execution
Links: bugtracker
Severity: S1 (Critical)
State: Verified

MariaDB

1. Incorrect Join Execution When Controlling BKA and BKAH Join Algorithms
Links: bugtracker
Priority: Major
State: CONFIRMED

2. Incorrect Join Execution When Controlling BNLH and BKAH Join Algorithms
Links: bugtracker
Priority: Major
State: CONFIRMED

3. Incorrect Join Execution When Controlling Outer Join Operations
Links: bugtracker
Priority: Major
State: CONFIRMED

4. Incorrect Join Execution When Controlling Join Buffer Size
Links: bugtracker
Priority: Critical
State: CONFIRMED

5. Incorrect Join Execution When Controlling Join Cache
Links: bugtracker
Priority: Major
State: CONFIRMED

6. `Lost connection to server during query’ error occurred while executing the query
Links: bugtracker
Priority: Major
State: CONFIRMED

7. When executing GROUP BY NULL, Mariadb returns unexpected results
Links: bugtracker
Priority: Major
State: CONFIRMED

8. In the GROUP BY clause, MariaDB incorrectly handled ‘ ‘ and NULL
Links: bugtracker
Priority: Major
State: CONFIRMED

9. Converting integers to float numbers returns unexpected results in mariadb
Links: bugtracker
Priority: Major
State: CONFIRMED

TiDB

1. Incorrect Merge Join Execution when transforming hash join to merge join
Links: bugtracker
Severity: Critical
State: Fixed

2. Merge Join executed incorrect resultset which missed -0
Links: bugtracker
Severity: Critical
State: Fixed

3. Merge Join executed incorrect resultset which returned empty resultset
Links: bugtracker
Severity: Critical
State: Fixed

4. Merge Join executed incorrect resultset which returned NULL
Links: bugtracker
Severity: Critical
State: Fixed

5. Merge Join executed incorrect resultset which missed rows
Links: bugtracker
Severity: Critical
State: Fixed

6. TiDB and TiKV’s cast float as data/datetime are inconsistent with MySQL
Links: bugtracker
Severity: Major
State: Verified

7. When executing GROUP BY NULL, TiDB returns unexpected results
Links: bugtracker
Severity: Moderate
State: Fixed

8. When executing the GROUP BY and HAVING clauses, TiDB returns unexpected results
Links: bugtracker
Severity: Critical
State: Fixed

9. When executing the DATE_FORMAT function, TiDB returns unexpected results
Links: bugtracker
Severity: Moderate
State: Verified

10. In the GROUP BY clause, TiDB incorrectly handled ‘ ‘ and NULL
Links: bugtracker
Severity: Major
State: Fixed