- [] Add SQL parser that parses the query into a tree
- SELECT
- FROM
- WHERE
- JOIN
- [] ORDER BY
- [] LIMIT
- Aggregate/Group By/Having
- [] Subquery
- [] Subquery in SELECT
- [] Subquery in FROM
- [] Subquery in WHERE
- [] Others...
- [] Add a column_id manager that assigns a unique id to each column
- Query without subquery
- [] Subquery
- Show logical plan of other databases
- DuckDB
- Datafusion