Can I use CallableStatement in JSTL?

Question

Is it possible to use CallableStatements in JSTL? I would like to be able to do something like this:
<sql:update var="res" sql="{ ? = call rms.campaigns.s_code_update(?, ?, ?, ?) }" >
<sql:param value="${item1}" />
<sql:param value="${item2}" />
<sql:param value="${item3}" />
<sql:param value="${item4}" />
<sql:param value="${item5}" />
</sql:update>
And then how to retrieve the result (first parameter)? Also, the second parameter is also IN-OUT, how to get its value?
It all works fine in scriplet, of course. And because I am new to OC4J, I don't know how to write a custom tag. Don't really have time to fig the documentation either.
Thank you for response.

Answer 1

I wouldn't use the SQL taglib at all. It is only useful for quick tests, but certainly not for constant/production use. The same applies to scriptlets as well.
Use real Java classes for the business and data logic. Write a DAO class which interacts with the database and write a Servlet class which interacts with the DAO class and sets the results in the request or session scope and forwards the request to the JSP. Finally in the JSP use JSTL/EL to access and iterate over the results.