Experimental
Compile an AggregationSpec into a GROUP BY SELECT. Group-by fields are echoed in the projection (so the returned rows carry the group key), followed by each metric expression aliased to its alias (or fn_field).
SELECT
alias
fn_field
Compile an AggregationSpec into a GROUP BY
SELECT. Group-by fields are echoed in the projection (so the returned rows carry the group key), followed by each metric expression aliased to itsalias(orfn_field).