Tyler, A think you could add this values as python constants to pycassa. This would be very useful for many people.
2012/4/24 Drew Kutcharian <d...@venarc.com> > Nice, that's exactly what I was looking for. > > > On Apr 24, 2012, at 11:21 AM, Tyler Hobbs wrote: > > Oh, I just realized that you're asking about the lowest TimeUUID > *overall*, not just for a particular timestamp. Sorry. > > The lowest possible TimeUUID is '00000000-0000-1000-8080-808080808080'. > The highest is 'ffffffff-ffff-1fff-bf7f-7f7f7f7f7f7f'. > > On Tue, Apr 24, 2012 at 12:47 PM, Drew Kutcharian <d...@venarc.com> wrote: > >> Thanks. So looking at the code, to get the lowest possible TimeUUID value >> using your function I should just call convert_time_to_uuid(0) ? >> >> >> On Apr 24, 2012, at 10:15 AM, Tyler Hobbs wrote: >> >> Yes, I have tested it. >> >> On Tue, Apr 24, 2012 at 12:08 PM, Drew Kutcharian <d...@venarc.com>wrote: >> >>> Thanks Tyler. So have you actually tried this with Cassandra? >>> >>> >>> >>> On Apr 24, 2012, at 5:44 AM, Tyler Hobbs wrote: >>> >>> At least for TimeUUIDs, this email I sent to client-dev@ a couple of >>> weeks ago should help to explain things: >>> http://www.mail-archive.com/client-dev@cassandra.apache.org/msg00125.html >>> >>> Looking at the linked pycassa code might be the most useful thing. >>> >>> On Tue, Apr 24, 2012 at 1:46 AM, Drew Kutcharian <d...@venarc.com>wrote: >>> >>>> Hi All, >>>> >>>> Considering that UUIDs are compared as numbers in Java [1], what are >>>> the lowest and highest possible values a valid UUID can have? How about >>>> TimeUUIDs? >>>> >>>> The reason I ask is that I would like to pick a "default" UUID value in >>>> a composite column definition like Composite(UUID1, UUID2) where UUID1 can >>>> be set to the default value if not supplied. In addition, it'd be nice if >>>> the "default" columns are always sorted before the rest of the columns. >>>> >>>> I was thinking of just doing "new UUID(Long.MAX_VALUE, Long.MAX_VALUE)" >>>> or "new UUID(Long.MIN_VALUE, Long.MIN_VALUE)" but not sure if that's going >>>> to cause other issues that I'm not aware of. >>>> >>>> Thanks, >>>> >>>> Drew >>>> >>>> >>>> [1] Here's the compareTo of java.util.UUID as a reference: >>>> >>>> public int compareTo(UUID val) { >>>> // The ordering is intentionally set up so that the UUIDs >>>> // can simply be numerically compared as two numbers >>>> return (this.mostSigBits < val.mostSigBits ? -1 : >>>> (this.mostSigBits > val.mostSigBits ? 1 : >>>> (this.leastSigBits < val.leastSigBits ? -1 : >>>> (this.leastSigBits > val.leastSigBits ? 1 : >>>> 0)))); >>>> } >>>> >>>> >>> >>> >>> -- >>> Tyler Hobbs >>> DataStax <http://datastax.com/> >>> >>> >>> >> >> >> -- >> Tyler Hobbs >> DataStax <http://datastax.com/> >> >> >> > > > -- > Tyler Hobbs > DataStax <http://datastax.com/> > > > -- Carlo Pires 62 8209-1444 TIM 62 3251-1383 Skype: carlopires
