We wide use Bitmap() dw function in the computed fields of our data-driven DWs. The display images can be stored as external files or as internal resources in PBD(s). In special case I want to display a specific image if the given source file is not accessible. For the external files I can check it with FileExists() global function. But how can I check such a case if it is not a valid resource was specified for the function?
If you call a global function from the bitmap function you can do more complex calculations including fileexist. Just don't try inline SQL.
Like this:
bitmap(f_determinebitmap)
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