Context: We are using NiFi to read data from a hive store and generate a csv output file. This output file has to be sent out to different recipients, and each recipient has their own requirement for the file name. Some recipients use static name like "enrollments.csv", but others use more dynamic name like "enrollments_<year>_<month>.csv". We maintain a sql table to store configuration settings for different recipients and file name is one of the settings stored. In the flow, this value is read from the database and assigned to the "filename" attribute, which eventually gets used by PutFile processor when writing content to the disk. The flow looks something like: ExecuteSQLRecord (Read file name configuration from Sql) --> EvaluateJsonPath (Assign read file name to filename attribute) --> SelectHiveQL (Read data from Hive) --> ConvertRecord (Convert data in Avro format to Csv format) --> PutFile (Writes csv file to disk, using filename attribute value for the name). Question: Does a function like eval exist in NiFi where an attribute value containing Expression Language can be evaluated? We are using Expression Language to define and store dynamic file names in sql store, for instance using "enrollments_${now():format('yyyy')}_${now():format('MM')}.csv" to generate file name of "enrollments_<year>_<month>.csv". Though, it doesn't seem to work as filename attribute gets assigned this value in a literal manner; hence needing an extra step to evaluate this expression. If this function doesn't exist, can this requirement be handled in a different way? Any help will be highly appreciated. Thanks! ... View more