Hive date based partitions -

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i have data in following form on hdfs:-

/basedir/yyyymmdd/fixedname/files

where yyyymmdd date folder , files list of files added in directory. need table in hive pick data yyyymmdd/fixedname directory. should work when added new date. e.g. add on 5th march 2013 files added on day go 20130305/fixedname folder. on 6th march 2013, files go 20130306/fixedname folder.

how alter hive table pickup data changing date fixed folder within it?

do have partitioned table? let's have partitioned table column date , want add new data. in case, have add data new directory , tell hive table (specifically metastore) has new partition using alter table add partition command.

let's have not created table yet. in case have create partitioned table , insert data table queries. magic comes when set these 2 flags:

set hive.exec.dynamic.partition=yes set hive.exec.dynamic.partition.mode = nonstrict;

these flags allow dynamic partitions (for more details read here).

remember have directories like: 

/date=yyyymmdd/fixedname/files

so have tell hive pick data subdirectories in recursive way. should set following flag (here there better explanation)

set mapred.input.dir.recursive=true;

finally able make queries date , data in subdirectories date specified in query (/date=yyyymmdd/...).

hope helps you.


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