CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration x (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