Hi, Sorry, it works now. Thank you. But, the value is not correct. (about half of real number of rows.) Is this sampled value ? It seems counting every row as far as i checked TableScanOperator.java .
Thanks, Hiroyuki On Wed, Aug 29, 2012 at 5:39 PM, Hiroyuki Yamada <mogwa...@gmail.com> wrote: > 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 >>
