for loop - How to partition large Hive table with many categories -


i want partition table in hive every unique item in row creates partition. there ~250 partitions 4 billion row table to loop or distinct. here thoughts in code (which have not worked)

alter table mytable add if not exists

partition( mycolumn = distinct mycolumn);

or there kind of loop in hive? require udf? hive answer preferable if possible.

thanks.

just use dynamic partitions
https://cwiki.apache.org/confluence/display/hive/tutorial#tutorial-dynamicpartitioninsert

it partition creation on go


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