does diskv support range query?
ifq opened this issue · comments
I'm look for a embedded db, and I feel diskv might be a choise. But I need to do some range query.
my scene is: I have some files, about 50000, each file have properties like size, time, tags which stored in db. I need to range query them by time or tags.
Does diskv support this? or in key-value db, how should I achieve this ?
thank you.
diskv is primarily a content-addressable-store, with very basic support for key ordering via the Index functionality.
If you want to do a range query over some property, you can construct your keys so that they contain this information, and write a custom LessFunction which sorts them by the property you care about.
Of course, this only allows one sort-order per diskv instance. If you need arbitrary ordering, it's probably a good sign that need a more sophisticated persistence layer than diskv.
Does that help?
thank you. That helps.
may be I need to reconsider my approach.