Sadananda, Look at Oozie workflow.
Regards Abhishek On Jan 28, 2013, at 11:05 PM, Sadananda Hegde <saduhe...@gmail.com> wrote: > Hello, > > My hive table is partitioned by year, month and day. I have defined it as > external table. The M/R job correctly loads the files into the daily > subfolders. The hdfs files will be loaded to > <hivetable>/year=yyyy/month=mm/day=dd/ folders by the scheduled M/R jobs. The > M/R job has some business logic in determining the values for year, month and > day; so one run might create / load files into multiple sub -folders > (multiple days). I am able to query the tables after adding partitions using > ALTER TABLE ADD PARTITION statement. But how do I automate the partition > creation step? Basically this script needs to identify the subfolders created > by the M/R job and create corresponding ALTER TABLE ADD PARTITION statements. > > For example, say the M/R job loads files into the following 3 sub-folders > > /user/hive/warehouse/sales/year=2013/month=1/day=21 > /user/hive/warehouse/sales/year=2013/month=1/day=22 > /user/hive/warehouse/sales/year=2013/month=1/day=23 > > Then it should create 3 alter table statements > > ALTER TABLE sales ADD PARTITION (year=2013, month=1, day=21); > ALTER TABLE sales ADD PARTITION (year=2013, month=1, day=22); > ALTER TABLE sales ADD PARTITION (year=2013, month=1, day=23); > > I thought of changing M/R jobs to load all files into same folder, then first > load the files into non-partitioned table and then to load the partitioned > table from non-partitioned table (using dynamic partition); but would prefer > to avoid that extra step if possible (esp. since data is already in the > correct sub-folders). > > Any help would greately be appreciated. > > Regards, > Sadu > >
