functional.sqlancer.tidb_challenge_48_test. UNIQUE constraint on DECIMAL/floating-point columns causes incorrect result for NULL in AND

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Full history of outcomes and elapsed time, ms:
NN SNAP_INFO CS_outcome SS_outcome CS_run_time SS_run_time CS_run_beg CS_run_end SS_run_beg SS_run_end
1 4.0.6.3215 2025.06.25 6461d P P 602 412 2025.06.29 07:57:20.668 2025.06.29 07:57:21.270 2025.06.29 06:55:44.439 2025.06.29 06:55:44.851
2 4.0.6.3214 2025.06.21 e11f6 P P 651 446 2025.06.25 12:50:08.838 2025.06.25 12:50:09.489 2025.06.25 11:48:03.363 2025.06.25 11:48:03.809
3 4.0.6.3213 2025.06.14 f015c P P 607 424 2025.06.21 07:50:45.229 2025.06.21 07:50:45.836 2025.06.21 06:48:23.312 2025.06.21 06:48:23.736
4 4.0.6.3212 2025.06.11 bc50d P P 631 423 2025.06.14 08:18:25.377 2025.06.14 08:18:26.008 2025.06.14 07:15:28.350 2025.06.14 07:15:28.773
5 4.0.6.3208 2025.06.10 19fe3 P P 610 420 2025.06.11 06:45:20.382 2025.06.11 06:45:20.992 2025.06.11 05:43:24.596 2025.06.11 05:43:25.016
6 4.0.6.3207 2025.06.07 205ff P P 647 445 2025.06.10 06:46:45.994 2025.06.10 06:46:46.641 2025.06.10 05:44:02.209 2025.06.10 05:44:02.654
7 4.0.6.3206 2025.05.22 d7d10 P P 601 406 2025.06.06 06:40:20.985 2025.06.06 06:40:21.586 2025.06.06 05:39:05.305 2025.06.06 05:39:05.711

Elapsed time, ms. Chart for last 7 runs:

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