ejb3/src/main/java/org/jboss/as/ejb3/timerservice/persistence/database/DatabaseTimerPersistence.java
private void extractDialects() {
        for (Object prop : sql.keySet()) {
            int dot = ((String)prop).indexOf('.');
            if (dot > 0) {
                databaseDialects.add(((String)prop).substring(dot+1));
            }
        }
    }
private void extractDialects() {
        for (Object prop : sql.keySet()) {
            int dot = ((String)prop).indexOf('.');
            if (dot > 0) {
                databaseDialects.add(((String)prop).substring(dot+1));
            }
        }
    }
Read the properties from the timer-sql and extract the database dialects.