Oracle Database Discussions

Hi,

Can someone answer this please?. I'm bit perplexed by the elapsed time in my v$sql

UPDATE ods_router_tables SET last_data_received = :b1, last_data_received_dst = :b3 WHERE
table_name = :b2 AND NVL(last_data_received,TO_DATE('01-JAN-1980','DD-MON-YYYY')) < :b1

Executions: 2786327
Disk reads: 0
Buffer gets: 6023381
Rows processed: 423713
Optimizer cost: 1
Sorts: 0
CPU Time: 898500000
Elapsed Time: 1.84467440681166E19

This table is quite small, only 44 records and if i run the statement in Sql plus, it runs in a
flash. But why this enormous Elapsed time in V$SQL. Is my conversion of this time to
seconds/execution correct?

Elapsed time in seconds/execution: 1.84467440681166E19/1000000/2786327=6620451 seconds!

I guess there is something seriously wrong here. I'm running on a 4 CPU server. DB version is 9.2.

I see similar figures in some of the innocent looking Insert statements as well.

thanks in advance,
Sunil