CreateQuery tutorial (children 3)
 Identifier tutorial
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration inner_poly (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Tuple (children 1)
       ExpressionList (children 2)
        DataType Int32
        DataType Int32
   ColumnDeclaration outer_poly (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Tuple (children 1)
       ExpressionList (children 2)
        DataType Int32
        DataType Int32
 Storage definition (children 1)
  Function Log (children 1)
   ExpressionList
