A recursive common table expression (CTE) is a CTE that references itself. The CTE repeatedly executes, returns subsets of data, until it returns the complete result set.
A recursive CTE is useful in querying hierarchical data such as organization charts where one employee reports to a manager and each component itself also consists of many other components.
You can work around this in MemSQL today, but it takes a lot of extra code to do so.
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