AlterQuery  alter_update_00806 (children 3)
 ExpressionList (children 1)
  AlterCommand UPDATE (children 2)
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier d
     Literal \'2018-01-02\'
   ExpressionList (children 1)
    Assignment e (children 1)
     Function CAST (children 1)
      ExpressionList (children 2)
       Literal \'foo\'
       Literal \'Enum8(\\\'foo\\\' = 1, \\\'bar\\\' = 2)\'
 Identifier alter_update_00806
 Set