[colivetree]

Overview

A filter the SQL provider can't apply now returns a 400 instead of an uncaught exception and an HTML 500:

• a value the column type can't hold (osm_id=x), on PostgreSQL
• an operator the column type doesn't support (osm_id LIKE 'a%'), on PostgreSQL
• a quoted column name ('name' LIKE 'a%'), on PostgreSQL and MySQL

Most of the sql.py diff is re-indentation from the new try. git diff -w shows the 30 or so lines that really changed.

Related Issue / discussion

Closes #2480

Additional information

Faults the request didn't cause stay errors: a DataError with no filter, a misconfigured time_field, and any ProgrammingError other than 42883.

Testing:

• 41 new test cases, including 30 I ran against the unfixed code and saw fail. Existing tests are unchanged and still pass.
• Each line of the fix was mutated in turn, and the tests caught all 9 mutants.
• Full CI on my fork: 712 passed, 0 failed (main (3.12)), plus flake8.
• Over HTTP with gunicorn and the test config: osm_id=x and the CQL cases went from an HTML 500 to a JSON 400.

An AI assistant (Claude Code) helped me investigate this and prepare the patch. I'm directing the work and will follow it through.

Dependency policy (RFC2)

• I have ensured that this PR meets RFC2 requirements

No new dependencies.

Updates to public demo

• I have ensured that breaking changes to the pygeoapi master demo server have been addressed
  • https://github.com/geopython/demo.pygeoapi.io/blob/master/services/pygeoapi_master/local.config.yml

No configuration changes.

Contributions and licensing

(as per https://github.com/geopython/pygeoapi/blob/master/CONTRIBUTING.md#contributions-and-licensing)

• I'd like to contribute a bugfix to pygeoapi. I confirm that my contributions to pygeoapi will be compatible with the pygeoapi license guidelines at the time of contribution
• I have already previously agreed to the pygeoapi Contributions and Licensing Guidelines

🤖 Generated with Claude Code

https://claude.ai/code/session_01UA1Vh8atCEhdk3WycqYunj