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| ID# | Date | Updated | Type | Status | Sev | Version | OS | CPU | Summary |
|---|---|---|---|---|---|---|---|---|---|
| 121321 | 2026-09-19 18:59 | 2026-09-19 18:59 | MySQL Server: Memory storage engine | Open | S2 | 26.10.0 (trunk), 9.7.2 (LTS), 8.4.11 (LT | Any | Any | ERROR 1062 '<group_key>' on DISTINCT over a DOUBLE column containing both -0e0 and 0e0 |
| 121317 | 2026-09-18 13:49 | 2026-09-18 13:49 | MySQL Server: Optimizer | Open | S1 | 8.4.11,9.7.1 | Linux (Fedora 42, kernel 6.17.12) | ARM (aarch64, 8 cores, 31 GiB RAM) | Multi-valued index in an index_merge (sort_union) plan crashes mysqld in check_unique_fields() |
| 121315 | 2026-09-18 11:42 | 2026-09-18 11:42 | MySQL Server: Optimizer | Open | S3 | 8.4.11, 9.7.1 | Any | Any | Redundant outer DISTINCT over UNION causes a second temporary-table deduplication |
| 121314 | 2026-09-18 10:03 | 2026-09-18 10:03 | MySQL Server: Replication | Open | S2 | 8.0.40/5.7.44 | Any | Any | MTS recovery silently skips transactions, leaving holes in gtid_executed |
| 121313 | 2026-09-18 5:38 | 2026-09-18 7:59 | MySQL Server: Optimizer | Verified (2 days) | S3 | 9.7.2 | Any | Any | REPLACE() Produces Different Results Depending on Whether GROUP BY Is Applied |
| 121312 | 2026-09-18 2:56 | 2026-09-18 8:00 | MySQL Server: Optimizer | Verified (2 days) | S3 | 9.7.2 | Any | Any | `DISTINCTROW` causes `REPEAT()` with a scalar subquery to return an incorrectly duplicated value. |
| 121311 | 2026-09-18 2:48 | 2026-09-18 7:50 | MySQL Server: Data Types | Verified (2 days) | S3 | 26.7.0 | MacOS (15.6.1) | ARM (Apple Silicon) | Inconsistent handling of FLOAT ZEROFILL in UPPER() and CHARACTER_LENGTH() |
| 121310 | 2026-09-18 2:36 | 2026-09-18 7:42 | MySQL Server | Not a Bug (2 days) | S3 | 26.7.0 | MacOS (15.6.1) | ARM (Apple Silicon) | REVERSE() returns inconsistent results for equivalent correlated scalar subqueries |
| 121309 | 2026-09-18 0:15 | 2026-09-18 0:25 | MySQL Server: Installing | Open (2 days) | S3 | 26.7 | Any | Any | Hard to copy & print End-User License Agreement when installing with mysql-26.7.0-win64.msi |
| 121307 | 2026-09-17 11:06 | 2026-09-17 11:06 | MySQL Server: DDL | Open | S3 | 8.4.11, 9.7.2, 26.7.0 | Any | Any | CTAS through temp table VIEW resets TIMESTAMP DEFAULT |
| 121305 | 2026-09-17 8:59 | 2026-09-17 10:47 | MySQL Server | Duplicate (3 days) | S3 | 9.7.2, 26.7.0 | Any | Any | mysql_query_attribute_string() accepts an INTEGER argument |
| 121304 | 2026-09-17 7:51 | 2026-09-17 8:53 | MySQL Server: Optimizer | Verified (3 days) | S2 | 8.4.10 | Any (Docker container) | Any (x86_64) | Incorrect empty result for RIGHT JOIN with always-false EXISTS condition |
| 121303 | 2026-09-17 7:37 | 2026-09-17 7:44 | MySQL Server: Optimizer | Verified (3 days) | S3 | 9.7 | Any | Any | IN() returns 1 instead of NULL when no list element matches the left-hand expression and the list contains NULL |
| 121302 | 2026-09-17 6:34 | 2026-09-20 2:31 | MySQL Server: Information schema | Open | S1 | 8.4.11;8.0.46;8.0.44;8.0.36 | Any | x86 | Server hangs: INSTALL PLUGIN (I_S plugin) re-locks LOCK_plugin via DD attachable transaction |
| 121301 | 2026-09-17 6:12 | 2026-09-17 7:33 | MySQL Server: Optimizer | Verified (3 days) | S3 | 8.4 | MacOS (15.6.1) | ARM (Apple Silicon) | NULLIF() returns different results for a NULL literal and a NULL-valued BIGINT |
| 121300 | 2026-09-17 2:25 | 2026-09-17 7:14 | MySQL Server: Optimizer | Verified (3 days) | S2 | 9.7.2 | Any | Any | `IN` predicate returns `TRUE` even though every corresponding equality comparison returns `FALSE` |
| 121298 | 2026-09-16 16:02 | 2026-09-18 7:18 | MySQL Server: FULLTEXT search | Verified (3 days) | S2 | 9.6.0 | Any | Any | MATCH() AGAINST() returns incorrect (near-random) relevance scores when wrapped in a CASE expression combined with DISTI |
| 121296 | 2026-09-16 13:56 | 2026-09-17 6:57 | MySQL Server | Can't repeat (3 days) | S2 | Any | Any | REPLACE() returns an incorrect result when a TINYINT column is used as the second argument instead of an equivalent inte | |
| 121292 | 2026-09-16 8:29 | 2026-09-16 10:39 | MySQL Server: Optimizer | Verified (4 days) | S2 | 8.4.11 (LTS), 9.7.2, 26.7.0 (current) — | Any (observed on Linux x86_64, Ubuntu 22.04.2 LTS, kernel 5.15.0-187-generic;) | Any (Any (observed on x86)) | INTERSECT ALL / EXCEPT ALL lose duplicate counts when the hash set operation spills to disk |
| 121291 | 2026-09-16 7:46 | 2026-09-16 7:46 | MySQL Server | Open | S3 | MySQL 26.7.0; MySQL 9.7.2 | Any | Any | EXPLAIN FORMAT=JSON v2 omits access_type for LooseScan/FirstMatch nodes |
| 121290 | 2026-09-16 7:08 | 2026-09-16 11:23 | MySQL Server: DDL | Verified (4 days) | S3 | 8.4.11, 9.7.2, 26.7.0 | Any | Any | CTAS with a JSON expression results in literal NULL default, broken SHOW CREATE TABLE |
| 121284 | 2026-09-15 6:13 | 2026-09-15 6:48 | MySQL Server: Partitions | Open | S2 | MySQL 9.7.2 and 26.7.0 | Any (Linux on x86_64) | Any | EXCHANGE PARTITION accepts mismatched functional indexes and causes wrong results |
| 121282 | 2026-09-14 20:15 | 2026-09-14 20:15 | MySQL Server | Open | S3 | 8.0.46 | Any | Any | SIGSEGV in fill_used_fields_bitmap/bitmap_copy via dynamic range optimization of a correlated subquery |
| 121281 | 2026-09-14 14:08 | 2026-09-16 15:06 | MySQL Server: Optimizer | Verified (4 days) | S3 | 8.4.11 - 9.4 | Any | Any | Wrong results in multi-join queries due to derived merge |
| 121275 | 2026-09-13 9:30 | 2026-09-13 9:30 | MySQL Server: Connection Handling | Open | S7 | 8.0.47 | Windows (Microsoft Windows 10 Home Single Language) | Any | Connection Issue |
| 121272 | 2026-09-12 14:16 | 2026-09-14 11:39 | MySQL Server: Optimizer | Verified (6 days) | S3 | 8.0.45 | MacOS (MacOS 26.5.2, using Homebrew) | ARM | Incorrect ORDER BY when using GROUP BY, GROUP_CONCAT() and COUNT(id) OVER() |
| 121271 | 2026-09-12 2:30 | 2026-09-12 2:31 | MySQL Server: Optimizer | Open | S5 | 9.7.1 | Ubuntu (22.04.4 LTS) | x86 (Intel(R) Xeon(R) Gold 5220 CPU @ 2.20GHz) | Equivalent range-predicate rewrite exposes ORDER BY cost-ranking inversion: 2.9x higher-cost plan runs 2.85x faster |
| 121270 | 2026-09-12 0:47 | 2026-09-14 11:22 | MySQL Server: Optimizer | Verified (6 days) | S3 | 8.0.45 | Any | Any | COUNT(DISTINCT ...) incorrectly counts a NULL result from AES_ENCRYPT() when its argument is a scalar subquery |
| 121269 | 2026-09-12 0:19 | 2026-09-14 10:55 | MySQL Server: Optimizer | Verified (6 days) | S2 | 9.7 | Any | Any | Incorrect result from IN comparison involving CONCAT() and a scalar subquery |
| 121267 | 2026-09-11 13:16 | 2026-09-15 7:25 | MySQL Server: DDL | Open (5 days) | S3 | 8.4.11, 9.7.2, 26.7.0 | Any | Any | CREATE TABLE AS SELECT FROM view drops column default expression in SHOW CREATE TABLE |
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