df-dev

To add a new SQL dialect to the DataFusion SQLParser, you modify the relevant src files to implement parsing logic, add dialect-specific tests in tests/sqlparser_<dialect>.rs, and include official documentation references in your code comments.

Validate Rust parser changes for upstream DataFusion contributions by running cargo test to ensure correctness, cargo clippy for linting, and cargo fmt for formatting. You must also update target/NOTE.md and ensure your PR title includes the dialect name.

Yes, you can reuse existing parsing infrastructure when extending DataFusion SQLParser dialects. The skill leverages existing functions like parse_begin_exception_end() to implement upstream dialect contributions and extend supported syntax efficiently.

Testing upstream dialect contributions in SQLParser involves adding specific test cases to the tests/sqlparser_<dialect>.rs file. This increases test coverage and ensures the newly added or modified parsing logic correctly handles the targeted dialect scenarios.

Your DataFusion SQLParser PR needs official documentation references to maintain documentation alignment. Including these references in code comments and PR notes ensures the implemented dialect features follow official syntax specifications and remain verifiable.