$data_exist=$DB->get_record_sql('select count(*) AS count FROM {competency_modulecomp} WHERE cmid=? AND competencyid =?',array($module_id,$competency_id));
}catch(dml_exception$e){
}
//var_dump($data_exist);
if($data_exist->count>0){
//$DB->get_record_sql(' delete FROM {competency_modulecomp} WHERE cmid=? AND competencyid =?' , array($module_id, $competency_id));