fail gracefully on SHOW CREATE TABLE targeting a view

[jepett0]

Changelog entry

Making SHOW CREATE TABLE fail on views rather than produce wrong output.

Changelog category

• Bugfix

Description for reviewers

Issue:

• show create table: when targeting a view that reads from a table t, produces results of a 'select * from t' #16401

[github-actions]

🟢 2025-03-28 15:38:12 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-03-28 15:38:15 UTC Pre-commit check linux-x86_64-release-asan for 80be3a2 has started.
⚪ 2025-03-28 15:38:30 UTC Artifacts will be uploaded here
⚪ 2025-03-28 15:41:17 UTC ya make is running...
🟡 2025-03-28 16:58:51 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?
12593	12466	0	74	19	34

⚪ 2025-03-28 17:00:26 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-03-28 17:13:50 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?
172 (only retried tests)	109	0	33	1	29

⚪ 2025-03-28 17:14:01 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-03-28 17:25:41 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?
92 (only retried tests)	31	0	32	1	28

🟢 2025-03-28 17:25:53 UTC Build successful.
🟢 2025-03-28 17:26:25 UTC ydbd size 3.8 GiB changed* by +22.1 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 0610a4d	merge: 80be3a2	diff	diff %
ydbd size	4 119 634 152 Bytes	4 119 656 792 Bytes	+22.1 KiB	+0.001%
ydbd stripped size	1 423 891 528 Bytes	1 423 898 824 Bytes	+7.1 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]

⚪ 2025-03-28 15:46:14 UTC Pre-commit check linux-x86_64-relwithdebinfo for 80be3a2 has started.
⚪ 2025-03-28 15:46:30 UTC Artifacts will be uploaded here
⚪ 2025-03-28 15:49:15 UTC ya make is running...
🟡 2025-03-28 16:54:23 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?
27003	24341	0	2	2548	112

⚪ 2025-03-28 16:57:49 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-03-28 17:08:39 UTC Tests successful.

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

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
158 (only retried tests)	60	0	0	0	98

🟢 2025-03-28 17:08:49 UTC Build successful.
🟢 2025-03-28 17:09:10 UTC ydbd size 2.2 GiB changed* by +176 Bytes, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 4d4d83d	merge: 80be3a2	diff	diff %
ydbd size	2 347 491 904 Bytes	2 347 492 080 Bytes	+176 Bytes	+0.000%
ydbd stripped size	490 849 536 Bytes	490 849 664 Bytes	+128 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}

[CyberROFL]

lgtm