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| ID# | Date | Updated | Type | Status | Sev | Version | OS | CPU | Summary |
|---|---|---|---|---|---|---|---|---|---|
| 119918 | 2026-02-17 8:12 | 2026-02-17 8:31 | MySQL Server: Optimizer | Verified (103 days) | S2 | 9.6.0 | Any | Any | Tree based explain format doesn't work well with MySQL Client or MySQL Shell |
| 106003 | 2021-12-29 20:06 | 2026-05-28 1:13 | MySQL Server: Optimizer | In progress (1613 days) | S3 | 8.0.27/5.7 | Any | Any | MySQL does not use indexes correctly for backwards ORDER BY conditions |
| 111700 | 2023-07-09 7:31 | 2023-07-12 5:55 | MySQL Server: Optimizer | Verified (1054 days) | S3 | 8.0.32, 8.0.33 | Any | Any | LIMIT values are not adequately handled in EXPLAIN. |
| 38550 | 2008-08-04 21:47 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (6436 days) | S5 | 5.0.60, 5.1 | Any | Any | multiple optimizer bugs for queries with references from preceding table |
| 116335 | 2024-10-10 16:53 | 2025-09-10 1:54 | MySQL Server: Optimizer | Verified (597 days) | S5 | 8.0.39 | Any | Any | Multi-valued index isn't used with some range scans on composite indexes |
| 18688 | 2006-03-31 14:07 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (6841 days) | S3 | 4.0, 4.1, 5.0 | Linux (linux) | Any | non-optimal plan for SELECT |
| 70555 | 2013-10-08 17:29 | 2013-10-09 8:03 | MySQL Server: Optimizer | Verified (4617 days) | S3 | 5.6.14 | Any | Any | EXPLAIN for INSERT ... SELECT waits for table lock |
| 100003 | 2020-06-26 11:18 | 2025-12-04 5:06 | MySQL Server: Security: Privileges | Verified (2162 days) | S3 | 8.0.20, 5.7.30 | Any | Any | EXPLAIN FOR CONNECTION seems to still require the SUPER privilege |
| 25571 | 2007-01-12 7:27 | 2013-03-03 20:45 | MySQL Server: Federated storage engine | Verified | S3 | 5.0.34-BK, 5.0.27 | Linux (Linux) | Any | EXPLAIN returns incorrect estimation of rows for federated table |
| 26232 | 2007-02-09 17:28 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (7045 days) | S3 | 4.1.22, 5.0.34, 5.0.36-BK | Linux (Linux) | Any | review of bug #20944 / proof of concept attached |
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