RE: [INTERFACES] JDBC next() method

This looks ok.

queryResult is null if there was an error in the query, so you should
check for that.

However, normal use would have the result parsed within a
while(queryResult.next()) {} loop, so your interpretation is correct.

Peter

--
Peter T Mount, IT Section
petermount@it.maidstone.gov.uk
Anything I write here are my own views, and cannot be taken as the
official words of Maidstone Borough Council

-----Original Message-----
From: Jon Barnett [mailto:jbarnett@pobox.com]
Sent: Wednesday, April 14, 1999 1:57 PM
To: 'pgsql-interfaces@hub.org'
Subject: [INTERFACES] JDBC next() method


I'm not quite sure about the correct operation of the JDBC next()
method.

Suppose I have the following code:

queryResult = dbStatement.executeQuery("select max(history_id) from
history");
if (queryResult.next())
    nextID = queryResult.getLong(1) + 1;
else
    nextID = 0;

With the postgresql JDBC driver, the minimum value for nextID is 1, even
if the
history table is empty.  I had expected that an empty result set would
be
returned if the history table is empty (0 rows returned for the select),
and
queryResult.next() would be false.  Is this an incorrect interpretation
on my
part?

Thanks,

JonB.