CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration x (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType Map (children 1)
         ExpressionList (children 2)
          DataType UInt8
          DataType AggregateFunction (children 1)
           ExpressionList (children 2)
            Identifier uniq
            DataType UInt64
 Storage definition (children 1)
  Function Memory