System Table as a Temp Table

How to use a system table as a Temporary Table 

We can use a system table as a temp table in our coding just try the following code....

static void CopyPersistedTableToTemp(Args _args)

{

    CustTable custTable;

    CustTable custTmpLedger;

    ;

    custTmpLedger.setTmp();

    custTable.recordLevelSecurity(true);

    while select custTable where custTable.City == 'Toronto'

    {

        custTmpLedger.data(custTable.data());

        custTmpLedger.doInsert();

     }

}

By using this code you can use a system table as a temp table and the good thing in this , this didnt disturb your main table configuration and data in that table. it just create a object of a table and use this object as a temporary.