10-14-2016 02:07 PM
i am learning the Hive i find out below hight lighted sentence not i am not able to understand . Ideally partion is to centralize store some data but if the data in that patition not only contain the patitioned data it is meaning less right ?Please help to explain
For example, all "US" data from "2009-12-23" is a partition of the page_views table. Note however, that just because a partition is named 2009-12-23 does not mean that it contains all or only data from that date; partitions are named after dates for convenience; it is the user's job to guarantee the relationship between partition name and data content! Partition columns are virtual columns, they are not part of the data itself but are derived on load.
10-17-2016 05:18 AM
10-17-2016 08:51 AM
thank you for your reply . my text is from Hive onlime document . so you mean the document is wrong should contain the same value .