How to deal with "oid" field when it contains NULL ?

Hi,

 

    I am retrieving value of "oid" field using "getBlob(columnName)" method of ResultSet .

It is working fine if that field contains some "oid" reference . But if the field contains

NULL , then it is throwing following error .

 

    "FastPath call returned ERROR:  inv_open: large object 0 not found"

 

    I am able to solve the problem using the following way .

   

    ResultSet rs ;

    //If the value of reference is 0 , then there is no Blob value in the row for the column "columnX".

    if(rs.getInt("columnX") != 0){

        Blob someBlob = rs.getBlob("columnX");

    }

 

    Is there any better way than this ?

    Thanks in advance.

 

Regards,

Ravi