Multi-stage explain plans are useful when a query uses features such as joins, subqueries, or distributed reshaping that do not exist in the single-stage path.
What to look for
logical plan shape
exchange and distribution boundaries
join and aggregation placement
implementation details when you need to see the physical operator chain
If you only need to understand a simple filter or aggregation query, the single-stage explain plan page is usually enough.
Useful patterns
When debugging multi-stage execution, start by:
running EXPLAIN PLAN FOR
checking whether the plan is logical or implementation-oriented
comparing the result with the query options you set
What this page covered
This page covered what the multi-stage explain plan is useful for and how to approach it when debugging advanced SQL.
Next step
If you are still deciding between engines, read SSE vs MSE in the broader query section.
