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Working with Parameters
A parameter is a variable whose value is specified at runtime. The most common usage of parameters is to provide filters to pass to the query. For example, you may want to specify an order date as an input parameter, so that the report only displays orders from that date. In this way, you can use parameters as part of the query condition (filter criteria) to ask Report Engine to only retrieve the records which satisfy the specified parameter values at runtime. The runtime parameter dynamically controls the report. This topic describes how you can create parameters in a catalog and apply them in different cases. It also introduces the different methods for specifying parameter values in Designer and how you can import values for parameters from class files in order to use flexible parameter values.
This topic contains the following sections:
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