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Re: need help on writing hive query - Hive - [mail # user]
...I did a similar query a few months ago.  In short, I left-padded the page na me with the time stamp, grouped with collect_set, and then used sort_array() .  There was some other cl...
   Author: Matt Tucker, 2012-10-31, 21:53
Re: HIVE NOT EXISTS - Hive - [mail # user]
...Hi Mohit,    Hive doesn’t support correlated subqueries.  In this instance, you  can do a left outer join to find values that are not in a table.    SELECT &nbs...
   Author: Matt Tucker, 2012-10-01, 22:43
Re: Load XML file into HIVE - Hive - [mail # user]
...Hi,  I was working on this several months ago, and ended up having to flatten eac h XML document to one root node per line. I believe that the other option wo uld be to write a custom I...
   Author: Matt Tucker, 2012-08-30, 23:25
Re: Passing date as command line arguments - Hive - [mail # user]
...Hi,  In the command line, you want to wrap 20120709 in double-quotes, as they get  stripped when being passed into the hiveconf variable.  Matt    On Aug 3, 2012, at...
   Author: Matt Tucker, 2012-08-04, 02:15
Re: Dates in Hive - Hive - [mail # user]
...I don't have the language manual in frot of me, but I would suggest casting d ateint to string, then using the unix_timestamp function. From_unixtime shou ld get it back into a date time str...
   Author: Matt Tucker, 2012-06-26, 00:10
Re: Partition deletion w/out using a literal partition value - Hive - [mail # user]
...Hive 0.8.0 has metadata optimizations ([HIVE-1003]), but your best bet is to write a shell script that executes 'show partitions ;', and then loop through the results and drop any partitions...
   Author: Matt Tucker, 2012-02-05, 22:40
Re: move tables into different database - Hive - [mail # user]
...Someone recently posted a command to convert a managed table to an external t able. If you also use that command, there's no expensive copy operation.  You'd probably want to move the d...
   Author: Matt Tucker, 2012-01-31, 01:52
Re: split into less files - Hive - [mail # user]
...It sounds like you want to look at setting hive.merge.mapredfiles to true in  your hive-site.xml.  Just be aware that it will likely add another map step to your jobs to conso lida...
   Author: Matt Tucker, 2011-11-09, 03:05
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