I am developing a report using iReport where I want to add a condition for null values. It's working with single select option as:
(city=$P{p_city} or $P{p_city} is null)
It means here if we do not pass any value for the city parameter, the report will work, but this is not working in case of a multiselect option. We have to choose a "Collection" value expression in iReport when we create a parameter:
($X{IN, country,p_country} or $P{p_country} is null)
I have created two input controls in JasperReports Server to run this report. One is a single select, "Select City" and the other is a multi select, "Select country", and the report is running without passing a value for the "Select city" parameter, but for the "select country" parameter, we must pass the value, because "Select country" is multi select and a Collection type parameter and you can not add null condition in a query as for the city parameter.
How we can modify the JRXML query?
You could put your condition like this city IN ($P!{p_city})
Then you could call by the url with:
The $X feature handles this automatically. In your case you have this in your query:
That gets converted to
1 = 1
in the case where your Collection is null. So there is no reason to add$P{p_country} is null
into the query.When the value of Collection parameter is NULL then to hide all the data output is done by bellow print when expression on table component.
notes:
$X{IN,filed_Name,param_Name}
in SQL query but here we have to take it as$P{Collection_parameter_Name}