Returns true if the instance corresponding to the CUBRIDOID exists. If otherwise, it returns false.
Boolean isInstance()
String sql = "select foo from foo" ;
CUBRIDResultSet rs = (CUBRIDResultSet)stmt.executeQuery(sql);
while (rs.next ()) {
CUBRIDOID oid = rs.getOID(1);
System.out.print("isInstance : " + oid.isInstance()); // true
oid.remove(); // remove the object in the oid
System.out.print("After remove, isInstance : "
+ oid.isInstance()); // false
}