Can this awasome add the range selection Feature?
liuzhijun opened this issue · comments
can take a reference here:
https://plyvel.readthedocs.io/en/latest/user.html#iterators
samples like:
for key, value in db.iterator(start=b'key-2', stop=b'key-4'):
for key, value in db.iterator(start=b'key-3'):
for key, value in db.iterator(start=b'key-2', include_start=False, stop=b'key-5', include_stop=True):
for key, value in db.iterator(prefix=b'ke'):
...etc
I can also submit a PR if ok.
Thank you !!
It sort of already exists with the iterkeys method.
I think I would also rather base the API on https://grantjenks.com/docs/sortedcontainers/sortedlist.html#sortedcontainers.SortedList.irange
Please describe your use case further.
Yes, I think it's OK.
Sorted Containers's irange api also works!
The idea that the requirements for range selection was come from the foundationdb's api.
From here: https://apple.github.io/foundationdb/data-modeling.html#the-core-data-model
What's more amazing is the tuple based key operation(pack and uppack) in foundation db's Python API that can apply to any sorted persistent storage that lead to a amazing OLTP persitent layer.
take a api usage here: https://apple.github.io/foundationdb/class-scheduling.html
the tuple based api here: https://apple.github.io/foundationdb/api-python.html#api-python-tuple-layer
That's all why I think the persistent container should support range selection based on the start and end key.
Thank you again for your kindly comment and such a amazoning library !!