64、saleforce 删除操作举例

String deletePrivelegeRoleSql = 'SELECT ROLEID__c, NAME__c, Id, PRIVELEGEID__r.ID, ROLEID__r.ID FROM PRIVILAGEROLE__c';
List<SObject> privelegeRoles = Database.query(deletePrivelegeRoleSql);
if(privelegeRoles.size() > 0){//查询有记录的时候才对子表进行删除操作
    PRIVILAGEROLE__c privelegeRole = (PRIVILAGEROLE__c)privelegeRoles[0];
    ID privelegeId = privelegeRole.PRIVELEGEID__r.ID;
    ID roleId = privelegeRole.ROLEID__r.ID;
    try{
        Database.delete(privelegeRole.Id);
    }catch(Exception e){
        System.debug('error occured when deleting privelegerole!');
    }
    try{
        Database.delete(privelegeId);
        Database.delete(roleId);
    }catch(DmlException e){
        System.debug('error occured when deleting privelege or role');
    }
}