Brief summary of the change made

This code snippet bypasses the RF05 rule for PostgreSQL dialects when an extension_reference type is detected in the parent stack. If the current SQL dialect is PostgreSQL and the parent stack contains an extension_reference, the function will return None, effectively ignoring the RF05 rule in this specific context.

• fix Do not use special characters in identifiers. create extension "uuid-ossp"; (postgres) #4935

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.

  test_pass_create_extension_reference_quoted:
    pass_str: CREATE EXTENSION IF NOT EXISTS "quoted-extension";
    configs:
      core:
        dialect: postgres
  
  test_pass_drop_extension_reference_quoted:
    pass_str: DROP EXTENSION IF EXISTS "quoted-extension";
    configs:
      core:
        dialect: postgres
  

  • .sql/.yml parser test cases in test/fixtures/dialects (note YML files can be auto generated with tox -e generate-fixture-yml).
  • 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.