We are using DSS Select REST API to extract endofday data .Using below endpoint
Providing the REST body as :
Providing market_fields and market_instrument_list_id as list .
In a different thread I got to know its possible to get the total RowCount of extract as Header in the response itself, could you help me how shall I get that programmatically (Any parameters to add/update in above REST body ? ) I want to test this using POSTMAN. We have been using python application which we migrated to scala one.
I'm sorry to say that is not possible. The Header/Footer functionality that delivers the RowCount is not available for the 4 Tick History extractions (ElektronTimeseriesExtractionRequest is one of them), it is only available for templates defined for scheduled DSS extractions, as discussed in this separate thread.
As a side note, I recommend you do not use the Extract end point, and replace it with the ExtractWithNotes endpoint. The Extract end point is being deprecated, as explained here.