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 >> > > > > > -- > Tyler Hobbs > DataStax >
