Searching saved objects should match anywhere in object name

[cchaos]

Adding to #14729, when searching saved objects, whether in the "Add panel" flyout in dashboards, or the "Select source" of a new visualization, should be able to match user's input to any where within the object's name not just the beginning.

Example: I'm trying to search for all my eCommerce objects, so I just type com but I get 0 results. I would have assumed it should match 'eCommerce'.

cc @flash1293

[elasticmachine]

Pinging @elastic/kibana-platform

[timroes]

@elastic/kibana-platform this is due to the way we currently using the standard analyzer for that field, and such an underscore won't cause us into terms splitting. Also we're only using suffix wildcards for search, so there is no chance you'll find that unless searching for something like kibana (which would automatically be kibana*). I am not sure what would be the recommended solution here. Should we use a non default analyzer splitting on all non character and exclude the _ for that, since it might be a character more often used for separating your name? Should be allow wildcard prefix (potentially slow)? Should we just keep this as it currently is, since it's the way the standard analyzer works?

[flash1293]

We could add a field with a reversed token filter for title and description https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-reverse-tokenfilter.html, this should give us the equivalent of wildcard prefixes without performance cost, right? I’m not sure how much performance matters in this case, because the searched document count doesn’t exceed a few thousand in normal use cases

[Leaf-Lin]

I'm facing this issue as well.
Is it underscore or the standard analyzer causing words to break up unexpectedly?

When I was trying to add new visualization into the dashboard, searching for ess only gives me somehow unexpected object hits:

I'm expecting the following hits: