Re: moveToInsertRow - Mailing list pgsql-jdbc

Dennis,

My understanding of an updateable result set is that you would first
have to get the result set from the db and then change something in it,
then update it.

In your case this won't work, I don't think there is any way you could
switch databases on it half way through the update.

The driver does handle batches, but I would be leary doing it this way,
my preference would probably be just to read a row, and  then write a
row.

Dave

-----Original Message-----
From: Dennis R. Gesker [mailto:dennis@gesker.com]
Sent: Wednesday, March 06, 2002 4:36 PM
To: Dave@micro-automation.net
Cc: pgsql-jdbc@postgresql.org
Subject: Re: [JDBC] moveToInsertRow


I actually only need to be able to update a single table. I have some
tables which reside in a MS-SQL database. I basically am writing some
routines that will pull the appropriate information from the MS-SQL
database and place this data into my Pg database. I was planning to pull

the information I need from the MS-SQL database (located in several
tables via a join) as a single resultSet containing only what I need
then loop through this result set writing into the appropriate table of
the Pg database via an updatable result set from the Pg connection.

Maybe there is a better (more efficient?) way to go about this. Since
using an updatable rs on the Pg side dosen't seem to be an option  I
wonder if looping throught the MS-SQL rs creating a big batch of insert
statments then executing the batch at once into Pg would be the way to
go. I'll have to look into the documentation of the Pg JDBC driver to
see if it can handle a batches of SQL statements.

I would certainly welcome any ideas or advice as I'm still working my
way up the learning curve.

Dennis


Dave Cramer wrote:

>There are some people looking at implementing the UpdateableResultSet
>methods, but I have no idea when.
>
>I do have a question though. How do you expect them to work? AFAIK It's

>only possible to update a result set that is from a single table.
>
>The driver would still end up issuing an update sql statement.
>
>Dave
>
>-----Original Message-----
>From: pgsql-jdbc-owner@postgresql.org
>[mailto:pgsql-jdbc-owner@postgresql.org] On Behalf Of Dennis R. Gesker
>Sent: Wednesday, March 06, 2002 3:32 PM
>To: pgsql-jdbc@postgresql.org
>Subject: [JDBC] moveToInsertRow
>
>
>Hello:
>
>I'm currently getting the following error using the moveToInsertRow
>method with an updatable result set using what (I think but am not
>entirely sure) is the current version of the JDBC driver for use with
>PostgreSQL. I found the jar containing this driver at
>jdbc.postgresql.org.
>
>This method is not yet implemented.
>      at org.postgresql.Driver.notImplemented(Driver.java:440)
>      at
>org.postgresql.jdbc2.UpdateableResultSet.moveToInsertRow(UpdateableResu
l
>tSet.java:98)
>
>
>Is there a stable version of this driver available that implements the
>moveToInsertRow capabilities on an updatable result set? If not is this

>method planned for sometime in the future?
>

--
Dennis Roman Gesker        ICQ: 194047
dennis@gesker.com        Fax: 413.740.4653

Seek freedom and become captive to your desires. Seek discipline and
find your liberty. -- F.H. 1985