EXPLAIN Actions for JOIN Step

Why it matters

This feature addresses the need for better debugging and understanding of how JOINs are processed internally by providing detailed explanations of JOIN execution steps. It helps users optimize queries and troubleshoot issues related to JOIN performance by revealing the specific actions taken during join processing.

How to use it

Users can execute EXPLAIN on queries involving JOIN operations to see the detailed actions and steps performed during the JOIN phase. For example, prepend EXPLAIN to a query with a JOIN to view its execution plan with join details.