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Tag Archives: hive
When using the load function to populate a Hive table, it’s important to understand what Hive does with the actual data files when the input data resides on your local file system or on the HDFS file system. For example, … Continue reading
Hive offers several collection data types: struct, map and array. These data types don’t necessarily make a lot of sense if you are moving the data from the well-structured world of the RDBMS but if you are working directly with … Continue reading
Like Pig and other scripting languages, Hive provides you with the ability to create parameterized scripts – greatly increasing the re-usability of the scripts. To take advantage, write your Hive scripts like this: select yearid, sum(HR) from batting_stats where teamid … Continue reading
Hive supports the concept of a database as a logical collection of objects stored in separate catalogs or namespaces. One neat thing that you can do with Hive is add extended properties to your database that are displayed when describing … Continue reading