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From Brandon Goodin <brandon.goo...@gmail.com>
Subject Re: ClobTypeHandlerCallback For Oracle 9i
Date Wed, 25 May 2005 18:09:25 GMT
from what i've heard around here. you should be using the 10g driver.
It works with 9i and functions better.

Brandon

On 5/24/05, Ronn <ronn.jr@gmail.com> wrote:
> Hi,
> 
> I am trying to insert clobs into Oracle 9i with Oracle 10g JDBC drivers.
> The problems I'm facing are:
> 
> 1) Tried using iBatis ClobTypeHandlerCallback, but encountered error
> of unable to setString with > 32K
> 
> 2) Override ClobTypeHandlerCallback's setParameter to remove the last line
> //setter.setString((String)parameter);
> so that I can bypass the error. It works if I am inserting 1 clob
> only. If I'm inserting 2 clobs,
> e.g. (key, clob1, clob2), it will work fine if the clobs are small. If
> i'm inserting 2 very large clobs, the order of the clobs in the
> database is reversed, i.e. it becomes (key,clob2,clob1). My fellow
> developers and I have totally no idea why this actually happened.
> 
> So what I did was to do an insert for the first clob, then follow by
> an update on the 2nd clob.
> 
> 3) Once in a while, I am getting "io exception: software caused
> connection abort: socket write error" or "No more data to read" when I
> do an insertion of clob. This really kills my App. Does anyone has the
> solution to this?
> 
> 4) I thought the above problem may be caused by the removal of
> setter.setString((String)parameter), hence I tried the alternative of
> using Spring's ClobStringTypeHandler instead. However, I got a
> ClassCastException when it is parsing the SqlMap's Parameter.
> 
> Does anyone has solution for inserting clobs which are > 32K and will
> not encounter the socket write error?
> 
> Is anyone using the oracle.sql.CLOB solution? Ever hit the socket
> write error or no more data to read error?
> 
> I will appreciate some help here. Thanks!
> 
> Regards,
> Ronn
> 
> >Can you use the Oracle 10g driver?
> 
> >Cheers,
> >Clinton
> 
> 
> On Wed, 9 Feb 2005 17:42:45 -0000, Peter Nunn <[EMAIL PROTECTED]> wrote:
> > I've been trying (for a while now) to implement a TypeHandlerCallback that
> > can WRITE clobs under Oracle 9i. It appears that this isn't possible. If
> > anyone has a solution to this then I'd be grateful for your assistance. Up to
> > now I haven't seen a workable solution.
> >
> > So far I have tried the following:
> >
> > 1) Call setter.setString(s).
> >
> > This fails because setString(x) has an upper limit of 4K.
> >
> > 2) Call setter.setCharacterStream(reader, s.length()). i.e. use same approach
> > as 2.0.9 ClobTypeHandlerCallback implementation.
> >
> > This doesn't work either.
> >
> > 3) Attempt to work with Oracle extension, namely oracle.sql.CLOB. The
> > preferred solution.
> >
> > This isn't possible because you cannot create an instance of oracle.sql.CLOB
> > directly. You need to either:
> >
> > a) create a temporary CLOB via a call to CLOB.createTemporary(...). This
> > requires a Connection object. Since ParameterSetter doesn't expose the
> > PreparedStatement we cannot get hold of the Connection object. So this
> > approach is a non-starter. Even if we did have the connection things aren't
> > straightforward because we need an OracleConnection... which you won't have
> > if you are using a DataSource to obtain your connections.
> >
> > b) execute a SELECT statement to obtain a ResultSet then obtain the CLOB
> > instance by calling ResultSet.getClob("field"). This clearly isn't an option
> > from within a TypeHandlerCallback.
> >
> > I'd really appreciate some help here... I've hit a brick wall. As of now I've
> > come to the conclusion that iBatis cannot handle CLOBS in Oracle prior to
> > 10g. This is clearly an issue.
> >
> > So the only remaining option is to write a JDBC Dao implementation and bypass
> > SQLMAPS...any improvements upon this?
> >
> > Peter Nunn
> > Senior Java Developer
> > EMAP UK IT
> > Telephone: 020 7017 3601
> > Mobile: 07866 670 530
> >
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