We presently have an optimization allowing the leading component of a string to be matched in a KEYED expression. eg
I := myindex( field[1..LENGTH(S)] = S );
I am using this in our geohashing logic.
Usually I have four strings of the same length - all of which I need to match to in this manner.
I := myindex( KEYED(field[1..4] IN myset) );
fails. I can obviously fake this with 4 index fetches and a concat - but it would be nice for the platform to support it