I have field name xyz , want to append value of this field in outputcsv filename
Where is your field located ? Is it in an index ? Are you trying to combine fields from multiple sources ?
Official documentation for output CSV is in Splunk docs :
So all you have to do is make sure your field is there before you run the outputcsv command:
index=yourindex sourcetype=yoursourcetype | fields fields_you_want_to_keep | outputcsv MyTestCsvFile
Pease provide some sample data if you want you help with your specific SPL.
Something like this..
| map search="search index=_internal| fields host,sourcetype,source|outputlookup $myCSVFile$.csv"
Above is an example.. Change it to your own searches to generate the xyz field and then apply it to the output of another search to generate outputlookup