Glad this is getting some love. This is seriously good software. Have you guys supported generic substring search yet? I recall it was not supported as of a few months ago.
No just curious. I understand how your indexing structure based on SSTables could find it challenging to support substring search in general. I think it tradeoff between fast querying and flexible functionality
Is it for a field with a high cardinality? If you tell us more about your use case, maybe we can find a workaround.