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The ORC file format was introduced in Hive 0.11.0. See ORC Files for details.

Besides the configuration properties listed in this section, some properties in other sections are also related to ORC:

• hive.default.fileformat
• hive.stats.gather.num.threads

hive.exec.orc.memory.pool

• Default Value: 0.5
• Added In: Hive 0.11.0

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When set to true Hive will answer a few queries like min, max, and count(1) purely using statistics stored in the metastore. For basic statistics collection, set the configuration property hive.stats.autogather to true. For more advanced statistics collection, run ANALYZE TABLE queries.

hive.stats.gather.num.threads

• Default Value: 10
• Added In: Hive 0.13.0 with HIVE-6578

Number of threads used by partialscan/noscan analyze command for partitioned tables. This is applicable only for file formats that implement the StatsProvidingRecordReader interface (like ORC).

Authentication/Authorization

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