Explain EXPLAIN SYNTAX (children 1) SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 1) Asterisk TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Subquery (children 1) SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 2) Identifier n Function finalizeAggregation (children 1) ExpressionList (children 1) Identifier s TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier test_00808_push_down_with_finalizeAggregation Function and (children 1) ExpressionList (children 2) Function greaterOrEquals (children 1) ExpressionList (children 2) Identifier n Literal UInt64_2 Function lessOrEquals (children 1) ExpressionList (children 2) Identifier n Literal UInt64_5