title: Application Insights purge data from custom data source
body: <p>I load custom data into an application insights app via a Azure Function programatically on a schedule. The workflow is essentially loading a json file onto an azure storage account, calling post to a particular endpoint with body containing link with sas token to json file, and then the ingest cycle occurs loading the json into the custom data source. What I have noticed is that the ingestion cycle concatonates old records with the new JSON - and I need to PURGE the data before triggering a new ingestion so the JSON file always represents the complete state of the data set. </p>
  
  <p>Is there any API used to purge data from an application insights custom data source programatically ? </p>