AlterQuery  bad_conversions_2 (children 2)
 ExpressionList (children 1)
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration e (children 1)
    DataType Enum (children 1)
     ExpressionList (children 2)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'bar\'
        Literal UInt64_1
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'foo\'
        Literal UInt64_2
 Identifier bad_conversions_2