couchdb-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Adam Kocoloski <kocol...@apache.org>
Subject Re: Candidates for built-in filter functions?
Date Sun, 20 Mar 2016 17:03:00 GMT
Hi Bob, instead of trying to anticipate all popular options what about enabling Mango selectors
as filters? I’d hope that over time the performance of a selector is comparable to a builtin.

Adam

> On Mar 20, 2016, at 12:34 PM, Alexander Shorin <kxepal@gmail.com> wrote:
> 
> On Sun, Mar 20, 2016 at 7:30 PM, Constantin Teodorescu
> <brailateo@gmail.com> wrote:
>> On Sun, Mar 20, 2016 at 6:19 PM, Robert Newson <rnewson@apache.org> wrote:
>> 
>>> As part of a new effort to improve replicator performance I'm planning to
>>> add new built-in filter functions. These run in the Erlang vm; saving the
>>> couchjs round trip.
>>> The first candidate is one that skips deleted documents as it's quite
>>> common to replicate with such a filter to remove deleted tombstones.
>>> This thread is for gathering more suggestions, so please help me out here.
>>> I'd like to reach the level we have for reduce functions which cover a good
>>> deal of the useful / functional cases.
>>> One filter I'm considering would allow filtering by the value of a named
>>> attribute. Something like "include this doc if doc.type equals 'purchase
>>> order'". Both the name and required value would be query parameters.
>>> 
>> 
>> It would be nice also:  _design/* or even something like  _id match regexp
>> ...
>> And the same for doc.type match regexp
> 
> That's the way to have a security issue by giving arbitrary user to
> run any regexp on server side. For instance:
> http://www.regular-expressions.info/catastrophic.html
> 
> --
> ,,,^..^,,,


Mime
View raw message