How does JSTL set sql:param types?

Question

Specifically I'm using PostgreSQL 8 with JDBC driver 8 and I'm simply trying to pass an sql param with value 1 as an int like this:
<sql:param value="1"/> should be passed as intbut:
<sql:param value="1"/> passed as varchar
<sql:param value="${1}"/> passed as bigint
<sql:param value="${1 - 1 + 1}"/> passed as bigint
<sql:param value="${1 / 1}"/> passed as double precisionI don't know why an int value is passed as bigint, and where the disconnect is between JSTL and the JDBC driver. Is there a way to coerce this param as an int using JSTL and EL?

Answer 1

>
Does passing the value as a String/BigInt cause
problems with your sql queries?Yes, PostgreSQL JDBC driver v8 has very strict typing, so passing varchar or long parameter to FUNCTION foo(int4) results in function not found errors.
Anyway I managed to workaround this by creating an Integer attribute and passing it to the sql param tag
<%
  request.setAttribute("one", new Integer(1));
%>
<sql:param value="${one}"/>