Question

How can I add a sub where statement in SQL if my Boolean parameter is true in JasperReports?
For example, I have my SQL as below:

SELECT * FROM shops WHERE region = "Canada" ORDER BY name

If my parameter is true, I would like to add and isactive = 'Y' just before ORDER BY.
Anybody knows how I can achieve this?

Answer 1

You can add additional parameter for setting additional clause value. After that you can use $P!{} syntax in query.

The sample:

<parameter name="param" class="java.lang.Boolean"/>
<parameter name="whereCond" class="java.lang.String" isForPrompting="false">
    <defaultValueExpression><![CDATA[$P{param} ? " AND isactive='Y'" : ""]]></defaultValueExpression>
</parameter>
<queryString>
    <![CDATA[SELECT * FROM shops WHERE region='Canada' $P!{whereCond} ORDER BY name]]>
</queryString>