Allow empty inputs for stage compilation

[nikvas0]

Changelog entry

Fixed #16938: error while compiling JOIN with one side been empty constant.

Changelog category

• Bugfix

Description for reviewers

Allow empty inputs for stage compilation.
Better fix would be eliminating empty inputs during optimization, but preparing such fix will take time. Thus we'll do it later (here #17010).

[github-actions]

⚪ 2025-04-09 19:54:25 UTC Pre-commit check linux-x86_64-release-asan for c23ec2d has started.
⚪ 2025-04-09 19:54:54 UTC Artifacts will be uploaded here
⚪ 2025-04-09 19:58:12 UTC ya make is running...
🟡 2025-04-09 21:11:55 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?
12536	12398	0	67	32	39

⚪ 2025-04-09 21:12:59 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-04-09 21:28:21 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?
186 (only retried tests)	99	0	36	16	35

⚪ 2025-04-09 21:28:30 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-04-09 21:41:13 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?
120 (only retried tests)	48	0	35	4	33

🟢 2025-04-09 21:41:20 UTC Build successful.
🟢 2025-04-09 21:41:51 UTC ydbd size 3.9 GiB changed* by +16 Bytes, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 6853d24	merge: c23ec2d	diff	diff %
ydbd size	4 136 601 624 Bytes	4 136 601 640 Bytes	+16 Bytes	+0.000%
ydbd stripped size	1 428 737 224 Bytes	1 428 737 160 Bytes	-64 Bytes	-0.000%

^{*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]

🟢 2025-04-09 19:56:42 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-04-09 19:56:47 UTC Pre-commit check linux-x86_64-relwithdebinfo for c23ec2d has started.
⚪ 2025-04-09 19:57:02 UTC Artifacts will be uploaded here
⚪ 2025-04-09 19:59:45 UTC ya make is running...
🟡 2025-04-09 21:04:21 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?
27105	24436	0	2	2554	113

⚪ 2025-04-09 21:06:34 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-04-09 21:16:21 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
162 (only retried tests)	59	0	0	0	103

🟢 2025-04-09 21:16:28 UTC Build successful.
🟢 2025-04-09 21:16:46 UTC ydbd size 2.2 GiB changed* by -128 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 6853d24	merge: c23ec2d	diff	diff %
ydbd size	2 357 628 864 Bytes	2 357 628 736 Bytes	-128 Bytes	-0.000%
ydbd stripped size	492 806 944 Bytes	492 806 880 Bytes	-64 Bytes	-0.000%

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