How to get database metadata from entity manager

Question

I have an app which is using hibernate and jpa. I need to find out which db it is connected to so that some native sql query i execute based on db say for eg. oracle and postgre

Answer 1

In case you want yo get the dba name from the url

public String getDbName() throws SQLException {
    SessionImplementor sessionImp = (SessionImplementor) em.getDelegate();
    DatabaseMetaData metadata = sessionImp.connection().getMetaData(); 

    String dbName="";
    Pattern urlDbName = Pattern.compile("databaseName=([A-Za-z0-9\\-\\_]+)");
    Matcher m = urlDbName.matcher(metadata.getURL());
    while (m.find()) {
        dbName = m.group(1);
    }

    return dbName;   
}