When hive.enhance.limittranspose is real, this variable specifies the nominal reduction within the number of tuples of your outer input on the sign up for or input of your union that the optimizer need to get to be able to use the rule.
Allow for JDO question pushdown for integral partition columns in metastore. Off by default. This enhances metastore general performance for integral columns, especially if there is certainly numerous partitions.
Regardless of whether to eliminate the union and drive the operators between union along with the filesink earlier mentioned union. This avoids an extra scan in the output by union.
This configuration house permits the consumer to deliver a comma-divided list of URLs which provide the sort and placement of Hadoop credential providers.
When Untrue, would not make a lock file and thus the cleardanglingscratchdir Software simply cannot remove any dangling scratch directories.
If This really is set to legitimate, mapjoin optimization in Hive/Spark will use resource file sizes related to the TableScan original site operator on the foundation in the operator tree, as an alternative to working with operator statistics.
Enables HiveServer2 to send out development bar update details. This really is available provided that the execution motor is tez.
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A comma separated listing of customers that can be extra to your ADMIN role if the metastore starts off up. Extra users can nonetheless be additional afterward.
When enabled, dynamic partitioning column will probably be globally sorted. Using this method we will retain just this article one report author open up for each partition benefit while in the reducer thereby lessening the memory tension on reducers.
Placing this flag to genuine will address legacy timestamps as time zone agnostic. Location it to Phony will address legacy timestamps as UTC-normalized.
This flag really should be established to real to help vector map join hash tables to work with max / max filtering for integer be part of queries applying MapJoin.
A quantity used to share sampling. By transforming this range, consumer will change the subsets of knowledge sampled.
This quantity means the amount of memory the local task can take to hold The true secret/value into an in-memory hash desk when this map be part of is followed by a gaggle by.