RUL (Resource Utility Language) responsible for SQL parsing, SQL formatting, preview execution plan and more utility functions.
| Statement | Function | Example | 
|---|---|---|
| PARSE SQL | Parse SQL and output abstract syntax tree | PARSE SELECT * FROM t_order | 
| FORMAT SQL | Parse SQL and output formated SQL statement | FORMAT SELECT * FROM t_order | 
| PREVIEW SQL | Preview SQL execution plan | PREVIEW SELECT * FROM t_order | 
