Page History

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• trunk/conf - This directory contains the packaged hive-default.xml and hive-site.xml.
• trunk/data - This directory contains some data sets and configurations used in the hive tests.
• trunk/ivy - This directory contains the ivy files used by the build infrastructure to manage dependencies on different hadoop versions.
• trunk/lib - This directory contains the run time libraries needed by Hive.
• trunk/testlibs - This directory contains the junit.jar used by the junit target in the build infrastructure.
• trunk/testutils (Deprecated)

Hive SerDe

What is a ! SerDe?

• !SerDe is a short name for "Serializer and Deserializer."
• Hive uses SerDe (and !FileFormat) to read and write table rows.
• HDFS files -!-> InputFileFormat )--> <key, value> -(-> Deserializer --> Row object
• Row object --> Serializer )--> <key, value> -(!-> OutputFileFormat --> HDFS files

Note that the "key" part is ignored when reading, and is always a constant when writing. Basically row object is stored into the "value".

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Compiling and Running Hive

Hive now uses maven for build, see updated hive maven build instructions

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Hive can be made to compile against different versions of Hadoop.

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