Re: [GENERAL] jdbc driver, error trapping.

From: Peter T Mount <peter(at)retep(dot)org(dot)uk>
To: Matthew Taylor <bmatthewtaylor(at)hotmail(dot)com>
Cc: pgsql-jdbc(at)postgresql(dot)org
Subject: Re: [GENERAL] jdbc driver, error trapping.
Date: 2001-01-25 09:26:03
Message-ID: 980414763.3a6ff12b5438b@webmail.retep.org.uk
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-general pgsql-jdbc

Quoting Matthew Taylor <bmatthewtaylor(at)hotmail(dot)com>:

Redirected to pgsql-jdbc(at)postgresql(dot)org

> I might have missed the obvious, but currently having the following
> behaviour.
>
>
> If I run the following java code,
>
> try{
> ResultSet rs = stmt.executeQuery("select blah from blah");
> while(rs.next())
> {
> System.out.println("result = "+rs.getString("blah") );
> }
> rs.close();
> }catch (Exception ex)
> {
> System.out.println("error="+ex.toString() );
> }
>
> on a table that has NO records in it, I get an error thrown 'No results
> were
> returned by the query'. I would like to keep the try catch blocks since
>
> 1. I am converting from Oracle backend which works fine otherwise.
> 2. some of my sql is dynamically generated, hence the try catch normally
>
> only picks up bad sql.
>
> any suggestions?? It's late and I'm prol not thinking straight...

Hmmm, your code shouldn't be throwing SQLException, but be returning an empty
ResultSet. What happens if you run your query through psql?

The exception you are seeing is where the backend is not returning anything,
not even an empty result set.

Peter

--
Peter Mount peter(at)retep(dot)org(dot)uk
PostgreSQL JDBC Driver: http://www.retep.org.uk/postgres/
RetepPDF PDF library for Java: http://www.retep.org.uk/pdf/

In response to

Browse pgsql-general by date

  From Date Subject
Next Message Dr R.Adscheid 2001-01-25 09:38:24 vacuum
Previous Message Ronnie Esguerra 2001-01-25 08:46:32 database transfer

Browse pgsql-jdbc by date

  From Date Subject
Next Message Michael Stephenson 2001-01-25 09:54:41 Re: [PATCHES] Re: [INTERFACES] Patch for JDBC timestamp problems
Previous Message Peter T Mount 2001-01-25 09:22:46 Re: Re: Postgresql JDBC driver - Support for Scrollable Result Sets