How to Pass a List of Values to an SQL 'IN' Clause in JasperReports?

Passing SQL "IN" Parameter List in JasperReports

When working with SQL "IN" predicates in JasperReports, developers may encounter challenges in dynamically setting the values of the "IN" parameters from Java programs. This article aims to address this issue and provide a comprehensive solution.

The SQL "IN" predicate allows users to specify a list of values to be checked against a column. In JasperReports, the "$P" syntax is typically used to define parameters that are passed from the Java program. However, attempting to pass a list of values using "$P" may lead to incorrect results.

To circumvent this limitation, JasperReports provides a special variable called "$X". Utilizing "$X" in conjunction with the "IN" predicate enables developers to dynamically set the parameter values. The following syntax demonstrates this approach:

select * from customer where $X{IN,customer_role,roles}

In this example, "customer_role" is the column being checked, and "roles" is the parameter that will contain the list of values. By leveraging "$X," JasperReports ensures that multiple values are handled correctly within the "IN" predicate.

Additional resources and documentation related to this topic can be found at the following links:

• [JasperReports Javadocs: $X Variable](https://community.jaspersoft.com/documentation/tibco-jasperreports-v642-developer-guide/embedded-jasperreports-server/java-api/parametertypes-defined#inca_javanull_1)
• [JasperReports Forum: Using $X in IN Predicates](https://community.jaspersoft.com/documentation/tibco-jasperreports-v642-developer-guide/embedded-jasperreports-server/java-api/parametertypes-defined#inca_javanull_1)

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