http://wiki.apache.org/hadoop/Hive/LanguageManual/VirtualColumns
On Mon, Sep 20, 2010 at 10:42 AM, yongqiang he <heyongqiang...@gmail.com> wrote: > INPUT__FILE__NAME, BLOCK__OFFSET__INSIDE__FILE > Both virtual column names use TWO underscores . > > On Mon, Sep 20, 2010 at 9:26 AM, Edward Capriolo <edlinuxg...@gmail.com> > wrote: >> On Mon, Sep 20, 2010 at 6:29 AM, lei liu <liulei...@gmail.com> wrote: >>> I use INPUT_FILENAME and BLOCKOFFSETINSIDE_FILE, but there is same error. >>> hive> select INPUT_FILENAME, BLOCKOFFSETINSIDE_FILE from person1; >>> FAILED: Error in semantic analysis: line 1:7 Invalid Table Alias or Column >>> Reference INPUT_FILENAME >>> >>> 2010/9/20 Thiruvel Thirumoolan <thiru...@yahoo-inc.com> >>>> >>>> I dont think https://issues.apache.org/jira/browse/HIVE-417 which added >>>> virtual columns was committed to 0.6. >>>> >>>> On Sep 20, 2010, at 3:47 PM, Thiruvel Thirumoolan wrote: >>>> >>>> It should be INPUT__FILE__NAME and BLOCK__OFFSET__INSIDE__FILE. >>>> >>>> On Sep 20, 2010, at 3:15 PM, lei liu wrote: >>>> >>>> I use hive0.6 version and execute 'select INPUT_FILE_NAME, >>>> BLOCK_OFFSET_INSIDE_FILE from person1' statement, hive0.6 throws below >>>> error: >>>> >>>> FAILED: Error in semantic analysis: line 1:7 Invalid Table Alias or Column >>>> Reference INPUT_FILE_NAME error. >>>> >>>> Don't hive0.6 support virtual columns? >>>> >>>> >>>> >>>> >>> >>> >> You have to be careful here. The wiki represents trunk, not a >> particular release. >> >> I started the process of moving the wiki to XDOC documentation for >> just this reason, so we can have accurate concise documentation for a >> release. version/feature confusion is very prevalent to those outside >> of hive. >> >> Currently the culture is in place for jira and wiki. I do not see it, >> because I often spend 10 hours working on a feature. While writing the >> xdoc for that feature probably takes about 8 minutes, and updating the >> wiki takes about 3. >> >> I imagine the majority of committers (at Facebook) they have an >> internal wiki and their users are less confused. The very astute users >> dig deep and figure out how to use the less documented features, but >> (here) some people just stop and ask at the first wiki inaccuracy. The >> long delay to crank out hive-6 has not helped the issue. If i had to >> hazard a guess right now I would say 80% of deployments are running a >> trunk between 5 branch and now. >> >> Edward >> >
