SELECT t.* from bas_cm_customer t where position('6651545956882725395' in t.manager_id) > 0 OR position ('5722501350582149881' in t.manager_id) > 0; 
SELECT t.* from bas_cm_customer t where position('6651545956882725395' in t.manager_id) > 0 OR position('5722501350582149881' in t.manager_id) > 0 ; 
SELECT t.* from bas_cm_customer t where strpos(t.manager_id,'6651545956882725395') > 0 or strpos(t.manager_id,'5722501350582149881') > 0; 
SELECT t.* from bas_cm_customer t where '6651545956882725395' ~ t.manager_id or '5722501350582149881' ~ t.manager_id; 
SELECT t.* FROM bas_cm_customer t WHERE (string_to_array('6651545956882725395,5722501350582149881', ',') && string_to_array(t.manager_id, ','))

if (StringUtils.isNotEmpty(managerId)){
 String[] managerIds = managerId.split(",");
 queryParam.put("managerIds", managerIds);
}

<isNotEmpty prepend="and" property="managerIds">
 <iterate property="managerIds" conjunction="OR">
  position(#managerIds[]# in bc.manager_id) > 0 
 </iterate> 
</isNotEmpty>

SELECT ARRAY[1] <@ string_to_array('1,2,3,4,5,6', ',')::int[];
SELECT position(1::VARCHAR in '1,2,3,4,5,6');
SELECT strpos(1::VARCHAR,'1,2,3,4,5,6');
SELECT '1,2,3,4,5,6' ~ 1::VARCHAR;