@kumdollar tree compass wrote: Example: Flowfile data branches,name,id,acc,serialNo parent1,abc,123,1234567788,1 child1,eee,345 child2,rrr,678 parent2,mno,786,97865662762,2 child1,ttt,764 child2,ryy,456 output: parent1,abc,123,1234567788,1 child1,eee,345,1234567788,1 child2,rrr,678,1234567788,1 parent2,mno,786,97865662762,2 child1,ttt,764,97865662762,2 child2,ryy,456,97865662762,2 I have to add the parent last two columns details to Childs of the same parent like parent1 last column details to child1, child2 rows in the flow file. Please suggest a possible way to use the processor. Hello, @kum    You can achieve this in NiFi using the following approach: Extract the Parent Values: Use a processor like EvaluateJsonPath or UpdateAttribute to extract the parent last two columns' details from the FlowFile attributes and store them in new attributes. Merge Parent Values with Child Rows: Use a processor like UpdateRecord or ExecuteScript to merge the parent values with the child rows. You'll need to write a custom script or configuration to append the parent values to each child row based on the parent's ID. Here's a basic example using UpdateRecord processor: Configure a schema that includes all columns from both parent and child rows. Use a Record Reader to read the data. Use a Record Writer to write the data. In the UpdateRecord processor, use a RecordPath to conditionally update child rows with parent values based on their ID. Use RecordPath expressions to refer to parent values.   for line in flowfile: if line.startswith("child"): # Get parent values from attributes parent_values = flowfile.getAttribute("parent_values") # Append parent values to the child row child_row = line + "," + parent_values # Write the modified child row to the output FlowFile output_flowfile.write(child_row) else: # If it's a parent row, update the parent values attribute parent_values = extract_parent_values(line) flowfile.setAttribute("parent_values", parent_values)     I hope my suggestion is helpful to you.   Best Regard, angela683h ... View more