25-1: schemeshard: fix split key selection from access sample

[ijon]

Merge from main:

• cdde9e6 -- schemeshard: fix split key selection from access sample #18201

Fix crash when selecting split key from key access sample containing entries of different sizes. Size differences could occur when exact key accesses are mixed with key prefix operations (such as range reads). But the key comparator used was asymmetrical, allowing comparison of full keys to prefixes but not vice versa.

fix #13991

Changelog entry

Table auto partitioning: Fixed crash when selecting split key from access samples containing a mix of full key and key prefix operations (e.g. exact/range reads).

Changelog category

• Bugfix

[github-actions]

⚪ 2025-05-15 12:11:03 UTC Pre-commit check linux-x86_64-release-asan for 50805ca has started.
⚪ 2025-05-15 12:11:11 UTC Artifacts will be uploaded here
⚪ 2025-05-15 12:14:05 UTC ya make is running...
🟡 2025-05-15 13:28:35 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
12150	11956	0	99	57	38

⚪ 2025-05-15 13:29:49 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-05-15 13:50:35 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
246 (only retried tests)	158	0	7	46	35

⚪ 2025-05-15 13:50:44 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-05-15 14:10:35 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Test history | Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
118 (only retried tests)	32	0	7	43	36

🟢 2025-05-15 14:10:44 UTC Build successful.
🟢 2025-05-15 14:11:15 UTC ydbd size 3.6 GiB changed* by +44.1 KiB, which is < 100.0 KiB vs stable-25-1: OK

ydbd size dash	stable-25-1: a3e836e	merge: 50805ca	diff	diff %
ydbd size	3 912 498 160 Bytes	3 912 543 368 Bytes	+44.1 KiB	+0.001%
ydbd stripped size	1 368 422 768 Bytes	1 368 442 416 Bytes	+19.2 KiB	+0.001%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

🟢 2025-05-15 12:13:54 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-05-15 12:53:28 UTC Pre-commit check linux-x86_64-relwithdebinfo for 50805ca has started.
⚪ 2025-05-15 12:54:23 UTC Artifacts will be uploaded here
⚪ 2025-05-15 12:57:46 UTC ya make is running...
🟡 2025-05-15 13:55:54 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
19197	17922	0	3	1213	59

⚪ 2025-05-15 13:57:36 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-05-15 14:18:48 UTC Tests successful.

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
125 (only retried tests)	67	0	0	0	58

🟢 2025-05-15 14:19:00 UTC Build successful.
🟡 2025-05-15 14:19:17 UTC ydbd size 2.1 GiB changed* by +113.0 KiB, which is >= 100.0 KiB vs stable-25-1: Warning

ydbd size dash	stable-25-1: 7a9a4c6	merge: 50805ca	diff	diff %
ydbd size	2 249 014 112 Bytes	2 249 129 864 Bytes	+113.0 KiB	+0.005%
ydbd stripped size	475 964 920 Bytes	475 988 120 Bytes	+22.7 KiB	+0.005%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}