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Group by pushdown for JDBC or FederatedX



I'm evaluating if I can use Maria's JDBC connector to join tables from
Apache Pinot (they have a prototype jdbc connector).

When external tables are used (like JDBC or FederatedX), are group bys
pushed down or do these connectors return the raw rows to Maria?  I see
comments about lack of filter pushdowns for FederatedX.  I wouldn't the raw
level data coming back from Pinot (there are too many rows to be

- Dan

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