Following this thread, I came across the following post that states that according to the JDBC specification, invoking PreparedStatement.setObject(index, null) should set a nullable column to NULL:
http://www.mail-archive.com/[EMAIL PROTECTED]/msg06987.html However, nowhere does the documentation for java.sql.PreparedStatement.setObject discuss NULL values: http://java.sun.com/j2se/1.4.2/docs/api/java/sql/PreparedStatement.html#setObject(int, java.lang.Object) It states: "The given argument will be converted to the corresponding SQL type before being sent to the database," but it says nothing about how it handles a null object reference. Derek -----Original Message----- From: Keith [mailto:[EMAIL PROTECTED] Sent: May 19, 2004 10:28 AM To: [EMAIL PROTECTED] Subject: Re: [JSTL] How do I enter a null value with <sql:param>? This was on the Users list and was my problem. But mine had to do specifically with the <sql:dateParam> and the Oracle JDBC driver. The regular <sql:param> worked fine for me when I passed it a null value. Link to the starting thread in the archive: http://www.mail-archive.com/[EMAIL PROTECTED]/msg06748.html Keith ---------- Original Message ----------- From: Wolfgang Röckelein <[EMAIL PROTECTED]> To: Tag Libraries Users List <[EMAIL PROTECTED]> Sent: Wed, 19 May 2004 16:05:14 +0200 Subject: Re: [JSTL] How do I enter a null value with <sql:param>? > Derek Mahar wrote: > > > Your solution is equivalent to Case 2 that I listed in my original > > message. The Microsoft SQL Server JDBC driver complains with a > > JspException: > > > > javax.servlet.ServletException: javax.servlet.jsp.JspException: > > INSERT INTO tblTest(a) VALUES (?) > > : [Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]Syntax error > > converting the nvarchar value 'null' to a column of data type int. > > > > However, the JDBC driver accepts and correctly processes the > > following > > query: > > > > <sql:update> > > INSERT INTO tblTestDerek VALUES (null) > > </sql:update> > > > > In light of this, I suspect that there may be an error in the > > implementation of <sql:param> where it treats "null" as a string > > argument rather than as an SQL null argument. > > Please search the (user & devel) list. We discussed this problem a > while ago and > came to the conclusing that this is a problem caused by the JDBC driver used. > The subject might have been "SQL Update problem with Dates" > > Regards, > Wolfgang > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] ------- End of Original Message ------- --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] NOTICE: This email contains privileged and confidential information and is intended only for the individual to whom it is addressed. If you are not the named addressee, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this transmission by mistake and delete this communication from your system. E-mail transmission cannot be guaranteed to be secured or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. AVIS: Le présent courriel contient des renseignements de nature privilégiée et confidentielle et n’est destiné qu'à la personne à qui il est adressé. Si vous n’êtes pas le destinataire prévu, vous êtes par les présentes avisés que toute diffusion, distribution ou reproduction de cette communication est strictement interdite. Si vous avez reçu ce courriel par erreur, veuillez en aviser immédiatement l’expéditeur et le supprimer de votre système. Notez que la transmission de courriel ne peut en aucun cas être considéré comme inviolable ou exempt d’erreur puisque les informations qu’il contient pourraient être interceptés, corrompues, perdues, détruites, arrivées en retard ou incomplètes ou contenir un virus. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
