L027: Remove unnessary crawl in get_select_statement_info

[jpy-git]

Brief summary of the change made

Resolves #1973. Please, refer to the issue for description of fix.

N.B. some reason L027 was inheriting from L025 (which in turn inherits from L020) even though L025 provides no extra logic, I have corrected this to inherit from L020.

Are there any other side effects of this change that we should be aware of?

No

Pull Request checklist

• Please confirm you have completed any of the necessary steps below.

• Included test cases to demonstrate any code changes, which may be one or more of the following:

  • .yml rule test cases in test/fixtures/rules/std_rule_cases.
  • .sql/.yml parser test cases in test/fixtures/dialects (note YML files can be auto generated with python test/generate_parse_fixture_yml.py or by running tox locally).
  • Full autofix test cases in test/fixtures/linter/autofix.
  • Other.

• Added appropriate documentation for the change.

• Created GitHub issues for any relevant followup/future enhancements if appropriate.

[codecov]

Codecov Report

Merging #1974 (4ef9895) into main (1cb0be5) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main     #1974   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          148       148           
  Lines        10291     10290    -1     
=========================================
- Hits         10291     10290    -1     

Impacted Files	Coverage Δ
src/sqlfluff/core/rules/analysis/select.py	100.00% <ø> (ø)
src/sqlfluff/rules/L027.py	100.00% <100.00%> (ø)

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