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From "Derek Mahar" <DMa...@penson.ca>
Subject RE: [JSTL] How do I enter a null value with <sql:param>?
Date Wed, 19 May 2004 16:16:41 GMT
I still do not believe this is a JDBC driver problem for reasons that I have given in two previous
posts.

-----Original Message-----
From: Wolfgang Röckelein [mailto:wolfgang.roeckelein@wiwi.uni-regensburg.de] 
Sent: May 19, 2004 10:05 AM
To: Tag Libraries Users List
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


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