Page History

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Support was added for timestamp (HIVE-6394), decimal (HIVE-6367), and char and varchar (HIVE-7735) data types.   Support was also added for column rename with use of the flag parquet.column.index.access (HIVE-6938). Parquet column names were previously case sensitive (query had to use column case that matches exactly what was in the metastore), but became case insensitive (HIVE-7554).

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Support for remaining Parquet data types was added (HIVE-6384).

Hive 2.2.0

Adjust timestamp values written to/read from parquet files using a table property (HIVE-12767).

Resources

• Parquet Website
• Format specification
• Feature Matrix
• The striping and assembly algorithms from the Dremel paper
• Dremel paper
• Dremel made simple with Parquet