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 5.0.3.1674 2025.06.26 d366d P P 636 369 2025.06.27 05:24:58.946 2025.06.27 05:24:59.582 2025.06.27 04:02:32.945 2025.06.27 04:02:33.314
2 5.0.3.1673 2025.06.25 f0e1f P P 677 408 2025.06.26 05:29:46.175 2025.06.26 05:29:46.852 2025.06.26 04:06:50.402 2025.06.26 04:06:50.810
3 5.0.3.1668 2025.06.21 b8e22 P P 640 343 2025.06.25 05:29:00.811 2025.06.25 05:29:01.451 2025.06.25 04:05:42.547 2025.06.25 04:05:42.890
4 5.0.3.1667 2025.06.15 4374a P P 612 358 2025.06.21 05:10:36.835 2025.06.21 05:10:37.447 2025.06.21 03:46:50.458 2025.06.21 03:46:50.816
5 5.0.3.1666 2025.06.14 97178 P P 610 383 2025.06.15 05:37:13.682 2025.06.15 05:37:14.292 2025.06.15 04:13:33.368 2025.06.15 04:13:33.751
6 5.0.3.1665 2025.06.11 d8b62 P P 780 433 2025.06.14 05:59:52.231 2025.06.14 05:59:53.011 2025.06.14 04:30:38.686 2025.06.14 04:30:39.119
7 5.0.3.1661 2025.06.10 cfcf0 P P 791 436 2025.06.11 04:28:53.805 2025.06.11 04:28:54.596 2025.06.11 02:53:30.054 2025.06.11 02:53:30.490
8 5.0.3.1660 2025.06.07 db691 P P 780 427 2025.06.10 04:28:10.029 2025.06.10 04:28:10.809 2025.06.10 02:51:35.836 2025.06.10 02:51:36.263
9 5.0.3.1659 2025.05.28 f4c0f P P 794 438 2025.06.06 04:25:34.753 2025.06.06 04:25:35.547 2025.06.06 02:49:19.914 2025.06.06 02:49:20.352

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