Allow scripted_field values to dynamically recalculate with refresh interval

[jclosure]

Describe the feature:

It would be really useful to be able to opt scripted_fields out of request caching. Here is an example of a scripted_field that produces different output each time the Painless script in it runs.

Example

long seconds = (new Date().getTime() - doc['@timestamp'].value) / 1000;
long minutes = seconds / 60;
long hours = minutes / 60;
long days = hours / 24;

long ss = seconds % 60;
long mm = minutes % 60;
long hh = hours % 24;

def[] args = new def[] {hh, mm, ss};
if (days == 0) {
  return String.format ("%02d:%02d:%02d", args);
} else {
  return "days: " + days + ", " + String.format ("%02d:%02d:%02d", args);
}

The Duration till Now field's value gets calculated on initial page load. After that it's cached, it doesn't update each time the automatic refresh happens. The caching behavior doesn't allow for dynamically recalculating query values. It would very powerful and a nice user experience to be able to have Painless scripted_fields rerun each time the refresh interval fires. If possible it would be nice to be able to configure each scripted_field to opt in/out of caching on an individual basis.

[Bargs]

The scripted fields are getting recalculated on each request to Elasticsearch, we're just not showing you the updates. This is more of a general issue with the way the doc table is architected. We solved the problem for non-scripted fields by adding the document's version to the table's ng-repeat track by, but the version obviously doesn't increment when scripted fields change.

We're planning on refactoring the doc table in the future which should make this a non-issue for any doc changes, regardless of field type.

[jclosure]

Perhaps a per field version tracker could be used to invalidate changed values in individual cells in DiscoveryTable.

[lukasolson]

This appears to have been resolved with the doc table rewrite.