code: func EnumIn(db XODB, v0 pgtypes.Cstring, v1 pgtypes.Oid) (pgtypes.Anyenum, error) {
  	var err error
  
  	// sql query
  	const sqlstr = `SELECT pg_catalog.enum_in($1, $2)`
  
  	// run query
  	var ret pgtypes.Anyenum
  	XOLog(sqlstr, v0, v1)
  	err = db.QueryRow(sqlstr, v0, v1).Scan(&ret)
  	if err != nil {
  		return pgtypes.Anyenum{}, err
  	}
  
  	return ret, nil
  }
docs: // EnumIn calls the stored procedure 'pg_catalog.enum_in(cstring, oid) anyenum' on db.