Make saved search fields renameable in Lens / dashboards

[xIndeonx]

Description

In some dashboards, I have added saved searches. Currently, the columns carry the name of the field. This is not optimal however, as the full field length can be long or hard to understand for viewers of the dashboard. What I mean are these fields:

(Note, I photoshopped the documents out, the info's are there)

It would therefore be great if you could rename these (just as they are displayed to the user), IE host.os.type = OS .I know this is possible with ESQL (with rename X as Y), however it is not a viable option for us due to performance reasons.

[elasticmachine]

Pinging @elastic/kibana-visualizations (Team:Visualizations)

[markov00]

Hi @xIndeonx you can already rename a field name by adding a custom label.
Open the saved search in discover, then click on the column name options and select Edit data view field.
There you can add a custom label. This label will then appear in the table header

Please don't hesitate to reopen this if the problem is different.

[elasticmachine]

Pinging @elastic/kibana-data-discovery (Team:DataDiscovery)

[Erikg346]

Hey @markov00,
I think your approach works if you are using a data view for one use.
The issue I experience is that we might use a data view for different use cases and different dashboards. Changing the field name by the data view, will cause it to have the same name across all which isn't ideal.

[davismcphee]

@Erikg346 Although not exactly what you're asking for, another option would be to create a temporary data view with the same index pattern by clicking "Use without saving" in the data view creation flyout, then adding a custom label to one of its fields. This way it wouldn't affect the persisted data view used elsewhere.

You could also add a runtime field to the existing data view under a new name that targets the same underlying value, but this may come with some performance impact.