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| ID# | Date | Updated | Type | Status | Sev | Version | OS | CPU | Summary |
|---|---|---|---|---|---|---|---|---|---|
| 121188 | 2026-08-29 13:30 | 2026-09-01 4:50 | MySQL Server: Optimizer | Verified | S2 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | Materializing an `IN` subquery changes a `UNION`/`RIGHT JOIN` result |
| 121187 | 2026-08-29 13:28 | 2026-09-01 4:53 | MySQL Server: Optimizer | Verified | S2 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | Materializing a `TIME` expression changes comparison with `DATETIME` literals |
| 121184 | 2026-08-28 8:45 | 2026-09-01 4:59 | MySQL Server: Optimizer | Verified | S3 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | Adding an unrelated element to a mixed-type temporal IN list flips the match result of other elements |
| 121183 | 2026-08-28 8:06 | 2026-08-31 5:50 | MySQL Server: Optimizer | Verified (1 day) | S3 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | Single-element IN (rewritten to =) errors on non-convertible string, multi-element IN silently returns FALSE — behavior |
| 121181 | 2026-08-28 8:03 | 2026-08-31 5:41 | MySQL Server: Optimizer | Verified (1 day) | S2 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | Temporal BETWEEN returns FALSE instead of NULL when LHS->temporal conversion fails (uninitialized Time_val/Date_val comp |
| 121179 | 2026-08-27 18:23 | 2026-08-28 5:01 | MySQL Server: Optimizer | Verified (4 days) | S2 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | Framed window functions return wrong results when windowing steps are skipped (const plan, implicit grouping) |
| 121171 | 2026-08-26 2:42 | 2026-08-26 5:54 | MySQL Server: Optimizer | Verified (6 days) | S2 | 9.7.2, 26.07 | Any | Any | Hypergraph optimizer loses the LATERAL dependency of a materialized derived table under ref/index access |
| 121157 | 2026-08-23 6:37 | 2026-08-25 9:36 | MySQL Server: Optimizer | Verified (7 days) | S1 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | Timezone-dependent generated column breaks UNIQUE and makes table unrestorable |
| 121152 | 2026-08-22 6:09 | 2026-08-25 6:46 | MySQL Server: Optimizer | Verified (7 days) | S3 | 9.2 | Any | Any | CTE merge incorrectly loses the first alias when a BIT column is projected twice with different aliases |
| 121149 | 2026-08-21 13:17 | 2026-08-21 20:37 | MySQL Server: Optimizer | Verified (11 days) | S2 | 9.7.1 | Any | Any | MySQL temporal implicit conversion changes `TIMEDIFF` predicate results after materialization |
| 121147 | 2026-08-21 4:11 | 2026-08-21 20:40 | MySQL Server: Optimizer | Verified (11 days) | S3 | 9.7.1 | Ubuntu (22.04) | Any | QUOTE() incorrectly treated as null-rejecting in outer joins |
| 121145 | 2026-08-20 11:33 | 2026-08-21 6:44 | MySQL Server: Optimizer | Verified (11 days) | S3 | 8.0 | Ubuntu (22.04) | Any | COUNT(DISTINCT UUID()) / RAND() returns 1 under implicit grouping |
| 121141 | 2026-08-20 1:50 | 2026-08-20 5:26 | MySQL Server: Optimizer | Verified (12 days) | S1 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | group skip scan for deduplication collapses each group to one row before a semijoin/antijoin condition on a later index |
| 121113 | 2026-08-18 9:22 | 2026-08-19 14:23 | MySQL Server: Optimizer | Verified (13 days) | S3 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | `JSON_QUOTE()` metadata overflow truncates valid output |
| 121112 | 2026-08-18 9:20 | 2026-08-19 14:17 | MySQL Server: Optimizer | Verified (13 days) | S3 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | Character-set conversion metadata overflow causes silent data loss |
| 121111 | 2026-08-18 9:15 | 2026-08-19 8:24 | MySQL Server: Optimizer | Verified (13 days) | S3 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | Hex Result Metadata Uint32 Wrap |
| 121102 | 2026-08-17 1:29 | 2026-08-21 14:11 | MySQL Server: InnoDB storage engine | Verified (11 days) | S2 | 8.0.46,8.4.11,9.7.2, 26.10.0 | Any | Any | INPLACE rebuild may corrupt long-prefix secondary indexes |
| 121100 | 2026-08-16 22:04 | 2026-08-19 5:22 | MySQL Server: Optimizer | Verified (13 days) | S3 | 8.0.46, 8.4.11, 9.7.2 | Linux | ARM | Merged `CAST(col AS CHAR) COLLATE utf8mb4_0900_bin` makes col = UPPER(col) return wrong result |
| 121099 | 2026-08-16 22:01 | 2026-08-19 4:53 | MySQL Server: Optimizer | Verified (13 days) | S3 | 8.0.46, 8.4.11, 9.7.2 | Linux | ARM | Merged CASE/CAST view + aliased HAVING MIN(col) >= IFNULL(col, col) returns wrong result |
| 121091 | 2026-08-13 14:00 | 2026-08-14 11:08 | MySQL Server: Optimizer | Verified (18 days) | S2 | 8.0.46, 8.4.11, 9.7.2 | Any | Any | Wrapping a SET column in VIEW/CTE changes `HAVING MAX(set_col) > numeric_literal` semantics |
| 121085 | 2026-08-12 21:49 | 2026-08-13 7:14 | MySQL Server: Optimizer | Verified (19 days) | S3 | 8.0.46,8.4.11, 9.7.2 | Linux | ARM | A VIEW whose column is an expression drops a group in query |
| 121084 | 2026-08-12 20:45 | 2026-08-13 7:13 | MySQL Server: Optimizer | Verified (19 days) | S3 | 8.0.46,8.4.11, 9.7.2 | Linux | ARM | VAR_SAMP() result depends on the query plan |
| 121083 | 2026-08-12 20:39 | 2026-08-13 6:28 | MySQL Server: Optimizer | Verified (19 days) | S3 | 8.0.46,8.4.11, 9.7,2 | Linux | ARM | SELECT DISTINCT ... GROUP BY <same list> drops rows |
| 121082 | 2026-08-12 20:31 | 2026-08-13 6:31 | MySQL Server: Optimizer | Verified (19 days) | S3 | 8.0.46, 8.4.11, 9.7.2 | Linux | ARM | `x NOT IN (<set-operation subquery>)` drops rows |
| 121079 | 2026-08-12 12:49 | 2026-08-12 17:31 | MySQL Server: Optimizer | Verified (20 days) | S2 | 8.4.9 | Linux | Any | Wrong result: quantified comparison subquery (>= ALL etc.) evaluates FALSE under double negation |
| 121070 | 2026-08-11 0:30 | 2026-08-13 7:11 | MySQL Server: Optimizer | Verified (19 days) | S3 | 8.0.46, 8.4.11, 9.7.2 | Linux | ARM | VAR_SAMP (and VAR_POP / STDDEV_SAMP) over BIGINT UNSIGNED values near 2^64 is insertion-order dependent |
| 121068 | 2026-08-07 22:26 | 2026-08-10 5:21 | MySQL Server: Optimizer | Verified (22 days) | S3 | 8.0.46, 8.4.11, 9.7.2 | Ubuntu | ARM | NO_BACKSLASH_ESCAPES + UNION + escaped apostrophe raises error |
| 121046 | 2026-08-01 0:46 | 2026-08-04 7:45 | MySQL Server: Optimizer | Verified (28 days) | S3 | 8.0.46, 8.4.10, 9.7.1 | Any | Any | HAVING applied after SELECT DISTINCT deduplication → order-dependent wrong (empty) result |
| 121041 | 2026-07-30 9:21 | 2026-08-06 4:29 | MySQL Server: Optimizer | Verified (26 days) | S5 | 8.0.46, 8.4.11, 9.7.2 | Linux | x86 | JOIN a table with a condition that does not belong to it |
| 121040 | 2026-07-30 9:06 | 2026-08-03 8:00 | MySQL Server: Optimizer | Verified (29 days) | S2 | 8.0.46, 8.4.10, 9.7.1 | MacOS | ARM | derived condition pushdown across a set operation ignores collation equality, breaking predicate monotonicity (default) |
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