Hi, Thank you for the reply. I tried with the following setting, but I got the same result. (with num_rows=0)
hive.stats.dbconnectionstring=jdbc:derby:;databaseName=/tmp/TempStatsStore;create=true Is there any clue ? On Wed, Aug 29, 2012 at 4:09 PM, rohithsharma <rohithsharm...@huawei.com> wrote: > I resolved the issue with following way. > > Configure > "hive.stats.dbconnectionstring=jdbc:derby:;databaseName=/home/TempStore". > This works only in single node cluster. > > > Please check HIVE-3324. > > > -----Original Message----- > From: Hiroyuki Yamada [mailto:mogwa...@gmail.com] > Sent: Wednesday, August 29, 2012 11:57 AM > To: user@hive.apache.org > Subject: num_rows is always 0 in statistics > > Hi, > > I have run "analyse table" command several times to get statistics, > but I always get num_rows=0 like below. > (also, raw_data_size is 0) > > ----- > hive> analyze table lineitem compute statistics; > Total MapReduce jobs = 1 > Launching Job 1 out of 1 > Number of reduce tasks is set to 0 since there's no reduce operator > Starting Job = job_201208291425_0011, Tracking URL = > http://hadoop-node1:50030/jobdetails.jsp?jobid=job_201208291425_0011 > Kill Command = /usr/lib/hadoop-0.20/bin/hadoop job > -Dmapred.job.tracker=hadoop-node1:8021 -kill job_201208291425_0011 > Hadoop job information for Stage-0: number of mappers: 3; number of > reducers: 0 > 2012-08-29 15:16:16,133 Stage-0 map = 0%, reduce = 0% > 2012-08-29 15:16:20,154 Stage-0 map = 100%, reduce = 0% > 2012-08-29 15:16:22,168 Stage-0 map = 100%, reduce = 100% > Ended Job = job_201208291425_0011 > Table sf1.lineitem stats: [num_partitions: 0, num_files: 1, num_rows: > 0, total_size: 759863287, raw_data_size: 0] > ----- > > I tried the version 0.7.1, 0.8.1, 0.9.0 and > the same result. > Is there anything else I have to do to make it work ? > > Also, is statistics only works for managed tables ? > I tried it for external tables and it doesn't seem working. (all the > values are 0 ) > > Thanks, > > Hiroyuki >
