Page History

...

This flag should be set to true to enable vectorized mode of the reduce-side GROUP BY query execution. The default value is true.

hive.vectorized.execution.mapjoin.native.enabled

• Default Value: true
• Added In: Hive 1.2.0 with HIVE-9824

This flag should be set to true to enable native (i.e. non-pass through) vectorization of queries using MapJoin.

hive.vectorized.execution.mapjoin.native.multikey.only.enabled

• Default Value: false

• Added In: Hive 1.2.0 with HIVE-9824

This flag should be set to true to restrict use of native vector map join hash tables to the MultiKey in queries using MapJoin.

hive.vectorized.execution.mapjoin.minmax.enabled

• Default Value: false
• Added In: Hive 1.2.0 with HIVE-9824

This flag should be set to true to enable vector map join hash tables to use max / max filtering for integer join queries using MapJoin.

hive.vectorized.execution.mapjoin.overflow.repeated.threshold

• Default Value: -1
• Added In: Hive 1.2.0 with HIVE-9824

The number of small table rows for a match in vector map join hash tables where we use the repeated field optimization in overflow vectorized row batch for join queries using MapJoin. A value of -1 means do use the join result optimization. Otherwise, threshold value can be 0 to maximum integer.

hive.vectorized.execution.mapjoin.native.fast.hashtable.enabled

• Default Value: false
• Added In: Hive 1.2.0 with HIVE-9824

This flag should be set to true to enable use of native fast vector map join hash tables in queries using MapJoin.

hive.vectorized.groupby.checkinterval

• Default Value: 100000
• Added In: Hive 0.13.0 with HIVE-5692

...

For WebHCat configuration, see Configuration Variables in the WebHCat manual.