Adding a field name length in index pattern display

[Leaf-Lin]

Describe the feature:
Is it possible to add another column with the field name length and sortable so that one can identify if there's some problem with mapping explosion (which usually happens with long field names)

Describe a specific use case for the feature:

If the table can be a data grid with all columns configureable (like kibana discover), that will be even better!

Similarly, Elasticsearch also has an issue on restricting default field name length to try avoiding mapping explosion problem. elastic/elasticsearch#58952

Currently, there's no easy way to sort all the fields from all indices and find out which indices or which fields are problematic which often leads to an unstable cluster. If you save your GET _mapping into a mapping.json file, you can use the following jq command to extract the field name length information:

jq -c 'to_entries[] | .value.mappings.doc.properties | select(.!=null) | keys[] ' mapping.json | awk '{ print length-2, $0 }' | sort -n | uniq

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)

[elasticmachine]

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

[kertal]

Closing this because it's not planned to be resolved in the foreseeable future. It will be tracked in our Icebox and will be re-opened if our priorities change. Feel free to re-open if you think it should be melted sooner.