RE: Help with Java

My condolences to you.

On Tue, 3 Dec 2002, DENNIS WILLIAMS wrote:

> John - I forwarded your message to one of our newly-trained Java
> programmers. He replied with:
> The code is incomplete, how are they handling the connection.
> Obviously the while loops are messing each other up.
> There are multiple ways of handling this.
> If I see the complete code I can be more specific.
>
> Dennis Williams
> DBA, 40%OCP
> Lifetouch, Inc.
> dwilliams_at_lifetouch.com
>
>
> -----Original Message-----
> Sent: Tuesday, December 03, 2002 12:25 PM
> To: Multiple recipients of list ORACLE-L
>
>
> All,
>
> I am beginning the journey into JAVA and have hit an odd behavior
> (well, probably not, but I can't see any reason for it). I am
> building a list of tablespaces and the datafiles that belong to them.
> The open to the database is working fine. When I use:
>
> ResultSet myTablespaces = myStatement.executeQuery(
> "SELECT tablespace_name " +
> "FROM dba_tablespaces " +
> "WHERE contents = 'PERMANENT'"
> );
>
> while (myTablespaces.next()) {
> // retrieve the user from the row in the ResultSet using the
> // getString() method
> ct = ct + 1;
> String tablespace = myTablespaces.getString(1);
> System.out.println("Tablespace " + ct + " is: " + tablespace);
> }
> myTablespace.close();
>
> I am generating a list of tablespaces and the output is as expected.
> When I add a second result set, the first datafile of the first tablespace
> returns and then the program completes:
>
> ResultSet myTablespaces = myStatement.executeQuery(
> "SELECT tablespace_name " +
> "FROM dba_tablespaces " +
> "WHERE contents = 'PERMANENT'"
> );
> while (myTablespaces.next()) {
> // retrieve the user from the row in the ResultSet using the
> // getString() method
> ct = ct + 1;
> String tablespace = myTablespaces.getString(1);
> System.out.println("Tablespace " + ct + " is: " + tablespace);
>
> ResultSet myDataFiles = myStatement.executeQuery(
> "SELECT file_name " +
> "FROM dba_data_files " +
> "WHERE tablespace_name = '" + tablespace + "'"
> );
>
> while (myDataFiles.next()) {
> String filename = myDataFiles.getString(1);
> System.out.println(" " + filename);
> }
> myDataFiles.close();
> }
> myTablespaces.close();
>
>
> Anybody with some Java experience have any insite?
>
> As always, TIA,
>
> John P Weatherman
> Database Administrator
> Replacements Ltd.
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: John Weatherman
> INET: john.weatherman_at_replacements.com
>
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> Author: DENNIS WILLIAMS
> INET: DWILLIAMS_at_LIFETOUCH.COM
>
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Author: Alex
  INET: axs_at_m-net.arbornet.org

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