CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration x (children 1)
    DataType AggregateFunction (children 1)
     ExpressionList (children 2)
      Identifier uniq
      DataType UInt64
   ColumnDeclaration y (children 1)
    DataType Int64
 Storage definition (children 1)
  Function Memory
