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A variety utilized to percentage sampling. By changing this quantity, person will alter the subsets of knowledge sampled.

No matter whether to optimize multi group by question to crank out an individual M/R work system. When the multi group by query has widespread team by keys, It will likely be optimized to generate just one M/R job.

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LDAP attribute title within the user object which contains groups of which the user is usually a direct member, except for the first group, that's represented from the primaryGroupId. For example: memberOf.

Indicates no matter whether replication dump ought to include things like specifics of ACID tables. It should be made use of at the side of hive.

If turned on, splits generated by ORC will incorporate metadata about the stripes while in the file. This info is read remotely (from your client or HiveServer2 device) and despatched to all of the tasks.

Regardless of whether Hive should quickly mail progress facts to TaskTracker when using UDTF's to stop the undertaking having killed due to inactivity. End users need to be careful because this may avoid TaskTracker from killing duties with infinite loops.

By default Tez will request on the other hand quite a few CPUs MapReduce is configured to use for each container. This can be accustomed to overwrite the default.

The maximum facts dimension with the dimension table that generates partition pruning information. If reaches this limit, the optimization will probably be turned off.

No matter if Hive fetches bitvector when computing quantity of distinctive values (ndv). Maintain it established to Fake if you wish to utilize the outdated schema without bitvectors.

When hive.enhance.limittranspose is correct, this variable specifies the minimal share (fractional) reduction with the measurement from the outer enter from the sign up for or input in the union that the optimizer ought to get in an effort to use the rule.

A consumer-specified tailor made LDAP question which will be accustomed to grant/deny an authentication request. In find the event the consumer is a component from the query's consequence established, authentication succeeds. See Custom Query String for details.

To scrub up the Hive scratch Listing although starting up the Hive server (or HiveServer2). It's not an option for a multi-consumer surroundings since it will accidentally take out the scratch Listing in use.

Setting this flag to accurate will deal with legacy timestamps as time zone agnostic. Setting it to Untrue will take care of legacy timestamps as UTC-normalized.