如何在蜂巢中删除一周中给定日期的分区

Question

Able to drop a partition for a given day of the week ie Thursday, by hardcoding the value.

ALTER TABLE logs DROP IF EXISTS PARTITION(date=2014-10-30);

How to drop a partition for last Thursday(date=2014-10-30) with out hardcoding date value?

Answer 1

One way to dynamically pass date to the hiveql statement is by using hive variables, let assume we have hive script named alter.hql and its contents are:

alter.hql

ALTER TABLE logs DROP IF EXISTS PARTITION (date='${hiveconf:date}');

And you can invoke the alter.hql by passing the date variable to it:

hive -hiveconf date='2014-10-30' -f alter.hql