SybSQLException 'command not allowed within multi-statement transaction' in EAP 6

Issue

• Deployed an initializer to truncate a Sybase table on startup:

@Startup
@Singleton(name = "SybaseTruncInitializer")
public class SybaseTruncInitializer {

    @Resource(mappedName = "java:jboss/datasources/my-sybase")
    private DataSource datasource;

    @PostConstruct
    public void init() throws Exception {
        Connection con = datasource.getConnection();
        try {
            CallableStatement cs = con.prepareCall("{call sp_trunc_temp_tables}");
            try {
                cs.execute();
            ...

• Sybase raises the exception below:

com.sybase.jdbc4.jdbc.SybSQLException: TRUNCATE TABLE command not allowed within multi-statement transaction.