Hi James, Is this implementation present in the GitHub repo of Phoenix? If yes, can you provide me the package name/classes? I haven't got the opportunity to try out Phoenix yet but i would like to have a look at the implementation.
Thanks, Anil Gupta On Thu, May 16, 2013 at 4:15 PM, James Taylor <jtay...@salesforce.com>wrote: > Hi Anil, > No HBase changes were required. We're already leveraging coprocessors in > HBase which is a key enabler. The other pieces needed are: > - a type system > - a means to evaluate an ORDER BY expression on the server > - memory tracking/throttling (the topN for each region are held in memory > until the client does a merge sort) > Phoenix has all these, so it was just a matter of packaging them up to > support this. > > Thanks, > James > > > On 05/16/2013 02:02 PM, anil gupta wrote: > >> Hi James, >> >> You have mentioned support for TopN query. Can you provide me HBase Jira >> ticket for that. I am also doing similar stuff in >> https://issues.apache.org/**jira/browse/HBASE-7474<https://issues.apache.org/jira/browse/HBASE-7474>. >> I am interested in >> knowing the details about that implementation. >> >> Thanks, >> Anil Gupta >> >> >> On Thu, May 16, 2013 at 12:29 PM, James Taylor <jtay...@salesforce.com >> >wrote: >> >> We are pleased to announce the immediate availability of Phoenix 1.2 ( >>> https://github.com/****forcedotcom/phoenix/wiki/****Download<https://github.com/**forcedotcom/phoenix/wiki/**Download> >>> <https://github.com/**forcedotcom/phoenix/wiki/**Download<https://github.com/forcedotcom/phoenix/wiki/Download> >>> >). >>> >>> Here are some of the release highlights: >>> >>> * Improve performance of multi-point and multi-range queries (20x plus) >>> using new skip scan >>> * Support TopN queries (3-70x faster than Hive) >>> * Control row key order when defining primary key columns >>> * Salt tables declaratively to prevent hot spotting >>> * Specify columns dynamically at query time >>> * Write Phoenix-compliant HFiles from Pig scripts and Map/Reduce jobs >>> * Support SELECT DISTINCT >>> * Leverage essential column family feature >>> * Bundle command line terminal interface >>> * Specify scale and precision on decimal type >>> * Support fixed length binary type >>> * Add TO_CHAR, TO_NUMBER, COALESCE, UPPER, LOWER, and REVERSE built-in >>> functions >>> >>> HBase 0.94.4 or above is required with HBase 0.94.7 being recommended. >>> For >>> more detail, please see our announcement: http://phoenix-hbase.blogspot. >>> **** >>> com/2013/05/announcing-****phoenix-12.html<http://** >>> phoenix-hbase.blogspot.com/**2013/05/announcing-phoenix-12.**html<http://phoenix-hbase.blogspot.com/2013/05/announcing-phoenix-12.html> >>> > >>> >>> Regards, >>> >>> James >>> @JamesPlusPlus >>> http://phoenix-hbase.blogspot.****com/ <http://phoenix-hbase.** >>> blogspot.com/ <http://phoenix-hbase.blogspot.com/>> >>> >>> >> >> > -- Thanks & Regards, Anil Gupta
