Fix unhandled exception in executable table function for invalid escape sequences

[leftmain]

#101565

Changelog category (leave one):

• Not for changelog

Changelog entry (a user-readable short description of the changes that goes into CHANGELOG.md):

Fix unhandled exception in executable table function for invalid escape sequences

Documentation entry for user-facing changes

• Documentation is written (mandatory for new features)

N/A: just a bug fix

[alexey-milovidov]

This isn't a bug fix, it just changes one exception type (std::exception, boost::exception, which we don't expect, and prefer not to use) to another (which we expect). There was no unhandled exception, and there was no bug.

It does not fix the issue:

rejects unrecognized backslash escape sequences that were previously treated as literal characters by boost::split

[alexey-milovidov]

However, this change is good on its own.

[clickhouse-gh]

Workflow [PR], commit [4af9dd1]

Summary: ❌

job_name	test_name	status	info	comment
Stateless tests (arm_asan_ubsan, flaky check)		failure
	00746_sql_fuzzy	FAIL	cidb
Stateless tests (amd_asan_ubsan, flaky check)		failure
	00746_sql_fuzzy	FAIL	cidb
Stateless tests (amd_tsan, flaky check)		failure
	01355_CSV_input_format_allow_errors	FAIL	cidb
	01355_CSV_input_format_allow_errors	FAIL	cidb
	01355_CSV_input_format_allow_errors	FAIL	cidb

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AI Review

Summary

This PR converts an unhandled parser exception path in the executable table function into a regular ClickHouse BAD_ARGUMENTS exception and adds an integration test for invalid escape sequences in script arguments. The change is small, targeted, and addresses correctness/robustness in error handling without introducing obvious regressions.

ClickHouse Rules

Item	Status	Notes
Deletion logging	➖
Serialization versioning	➖
Core-area scrutiny	✅
No test removal	✅
Experimental gate	➖
No magic constants	✅
Backward compatibility	✅
SettingsChangesHistory.cpp	➖
PR metadata quality	✅
Safe rollout	✅
Compilation time	✅

Final Verdict

• Status: ✅ Approve

[clickhouse-gh]

LLVM Coverage Report

Metric	Baseline	Current	Δ
Lines	84.00%	84.10%	+0.10%
Functions	90.90%	90.90%	+0.00%
Branches	76.60%	76.60%	+0.00%

Changed lines: 86.67% (13/15) | lost baseline coverage: 1 line(s) · Uncovered code

Full report · Diff report