Using WWW_GET_REPORT
If you call WWW_GET_REPORT in a URL, you can specify the values that the user normally enters on the report selection screen as parameters. When the user clicks on your URL, there is then no need for a selection screen to execute a report, because the values have already been specified. This is particularly useful if most users enter the same selection criteria for a report.
If you use WWW_GET_REPORT to execute a report that has a selection screen, but you do not specify any parameters in the URL, the output corresponds to any default values defined for the report.
Therefore, when you skip the selection screen in this way, try to ensure that you have specified all the values you need in the URL beforehand. Otherwise, your output will be different from that expected.
You can specify parameter values for report variants, select-options, report parameters, checkboxes, and radio buttons in URLs.