Is there a Mendix-way to check if an attribute-value does exist in the database-table? The most straightforward way is to retrieve the table from Database with an XPath contraint [attribute = value]. But that will return me one record if it exists, or Null otherwise. That works fine, but does more than I need to know. I want to do this with as little processing as possible and want a boolean-return only. So without retrieving any record at all.
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