[Backport stable-26-1] PR #34959: YQ-5137 Streaming query metrics

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Changelog entry

YQ-5137 Streaming query metrics

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

Original PR(s)

• PR YQ-5137 Streaming query metrics #34959

Metadata

• Original PR author(s): @kardymonds
• Cherry-picked by: @kardymonds
• Related issues: None

Git Cherry-Pick Log

=== Cherry-picking a2b3f4d ===
Auto-merging ydb/core/kqp/executer_actor/kqp_executer_impl.h
[cherry-pick-stable-26-1-260227-091852 4ddf57bb354] YQ-5137 Streaming query metrics (#34959)
 Author: Dmitry Kardymon <kardymon-d@ydb.tech>
 Date: Fri Feb 27 11:30:53 2026 +0300
 8 files changed, 155 insertions(+)
 create mode 100644 ydb/core/kqp/executer_actor/kqp_streaming_helper.cpp
 create mode 100644 ydb/core/kqp/executer_actor/kqp_streaming_helper.h

---

PR was created by cherry-pick workflow run

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• Additional args: custom ya make arguments

[github-actions]

⚪ 2026-02-27 09:24:21 UTC Pre-commit check linux-x86_64-release-asan for 30d3ad1 has started.
⚪ 2026-02-27 09:24:39 UTC Artifacts will be uploaded here
⚪ 2026-02-27 09:26:58 UTC ya make is running...
🟡 2026-02-27 10:49:01 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
17254	17216	0	23	9	6

🟢 2026-02-27 10:49:12 UTC Build successful.
🟡 2026-02-27 10:49:44 UTC ydbd size 3.9 GiB changed* by +111.7 KiB, which is >= 100.0 KiB vs stable-26-1: Warning

ydbd size dash	stable-26-1: 6e18df0	merge: 30d3ad1	diff	diff %
ydbd size	4 216 481 336 Bytes	4 216 595 672 Bytes	+111.7 KiB	+0.003%
ydbd stripped size	1 577 628 416 Bytes	1 577 653 952 Bytes	+24.9 KiB	+0.002%

^{*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]

🟢 2026-02-27 09:25:17 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2026-02-27 09:32:01 UTC Pre-commit check linux-x86_64-relwithdebinfo for 30d3ad1 has started.
⚪ 2026-02-27 09:32:13 UTC Artifacts will be uploaded here
⚪ 2026-02-27 09:34:40 UTC ya make is running...
🟡 2026-02-27 11:41:48 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
46512	43062	0	6	3431	13

⚪ 2026-02-27 11:42:06 UTC ya make is running... (failed tests rerun, try 2)
🟡 2026-02-27 11:48:03 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
217 (only retried tests)	210	0	1	0	6

⚪ 2026-02-27 11:48:10 UTC ya make is running... (failed tests rerun, try 3)
🟢 2026-02-27 11:49:07 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
83 (only retried tests)	77	0	0	0	6

🟢 2026-02-27 11:49:14 UTC Build successful.
🟢 2026-02-27 11:49:38 UTC ydbd size 2.4 GiB changed* by +81.0 KiB, which is < 100.0 KiB vs stable-26-1: OK

ydbd size dash	stable-26-1: 6e18df0	merge: 30d3ad1	diff	diff %
ydbd size	2 587 421 528 Bytes	2 587 504 488 Bytes	+81.0 KiB	+0.003%
ydbd stripped size	544 950 376 Bytes	544 962 280 Bytes	+11.6 KiB	+0.002%

^{*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]

⚪ 2026-03-04 20:09:21 UTC Pre-commit check linux-x86_64-relwithdebinfo for 410098d has started.
⚪ 2026-03-04 20:09:41 UTC Artifacts will be uploaded here
⚪ 2026-03-04 20:12:04 UTC ya make is running...
🟡 2026-03-04 22:26:32 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
46561	43108	0	10	3429	14

⚪ 2026-03-04 22:26:50 UTC ya make is running... (failed tests rerun, try 2)
🟡 2026-03-04 22:34:32 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
272 (only retried tests)	266	0	1	0	5

⚪ 2026-03-04 22:34:40 UTC ya make is running... (failed tests rerun, try 3)
🔴 2026-03-04 22:39:20 UTC Some tests failed, follow the links below.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
77 (only retried tests)	71	0	1	0	5

🟢 2026-03-04 22:39:28 UTC Build successful.
🟢 2026-03-04 22:39:54 UTC ydbd size 2.4 GiB changed* by +87.6 KiB, which is < 100.0 KiB vs stable-26-1: OK

ydbd size dash	stable-26-1: ffe5a9b	merge: 410098d	diff	diff %
ydbd size	2 588 043 704 Bytes	2 588 133 424 Bytes	+87.6 KiB	+0.003%
ydbd stripped size	545 047 816 Bytes	545 057 352 Bytes	+9.3 KiB	+0.002%

^{*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]

⚪ 2026-03-04 20:09:40 UTC Pre-commit check linux-x86_64-release-asan for 410098d has started.
⚪ 2026-03-04 20:09:59 UTC Artifacts will be uploaded here
⚪ 2026-03-04 20:12:09 UTC ya make is running...
🟡 2026-03-04 21:32:59 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
17286	17237	0	26	15	8

🟢 2026-03-04 21:33:10 UTC Build successful.
🟡 2026-03-04 21:33:40 UTC ydbd size 3.9 GiB changed* by +124.7 KiB, which is >= 100.0 KiB vs stable-26-1: Warning

ydbd size dash	stable-26-1: 2a3f7c4	merge: 410098d	diff	diff %
ydbd size	4 217 334 656 Bytes	4 217 462 344 Bytes	+124.7 KiB	+0.003%
ydbd stripped size	1 577 858 336 Bytes	1 577 887 744 Bytes	+28.7 KiB	+0.002%

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