Operations are divided into transformations and actions.
Transformations are pipelined function (producing the same input type), and actions trigger computation and return results.
Transformation functions are saved and computed only when an action function is called. It permits to do optimizations.
| Transformation | Action |
|---|---|
| select | show |
| distinct | count |
| groupBy | collect |
| sum | save |
| orderBy | |
| filter | |
| limit |