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In Oracle and other DBs you can generate an execution plan for SQL.

Is this possible for Cassandra?

I want to determine if it is possible to measure the relative complexity of several CQL statements to retrieve query data.

A Google search did not indicate that this is possible.

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You can enable tracing of the CQL queries, and see how it's executed. In CQLSH it's done with command TRACING ON;, after you finish set TRACING OFF;.

This blog post provides more detailed description of it.

0

No, you cannot have only the explain plan without running the query, like in Oracle. You have to trace your query, which is not quite the same.

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