When hive.improve.limittranspose is real, this variable specifies the minimum reduction during the number of tuples from the outer input of your sign up for or enter of your union which the optimizer should get in an effort to use the rule.
Should really the metastore do authorization checks in opposition to the fundamental storage for operations like fall-partition (disallow the drop-partition When the user in question does not have permissions to delete the corresponding Listing on the storage).
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The utmost duration with the query string to retail outlet inside the lock. The default benefit is 1000000, Considering that the information limit of the znode is 1MB
If turned on, splits produced by ORC will involve metadata in regards to the stripes in the file. This knowledge is read remotely (from your customer or HiveServer2 device) and despatched to all the duties.
Whether or not Hive should automatically deliver progress details to TaskTracker when using UDTF's to prevent the process having killed due to inactivity. Consumers really should be cautious since this could reduce TaskTracker from killing responsibilities with infinite loops.
Listing of comma-divided keys taking place in table properties which will get inherited to freshly developed partitions. * implies each of the keys will get inherited.
When car reducer parallelism is enabled this component will be used to set a lower limit for the range of reducers that Tez specifies.
Specifies a completely competent area user to employ when binding to LDAP for authentication, in place of using the person alone. This allows for situations where all click here to read users don't have research permissions on LDAP, rather requiring just the bind consumer to possess research permissions.
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Standard mistake allowed for NDV estimates, expressed in share. This gives a tradeoff amongst precision and compute Value. A decrease worth with the error indicates higher precision and an increased compute Charge. (NDV suggests variety of my latest blog post distinct values.)
No matter whether to enhance multi group by query to generate a single M/R job plan. If the multi team by question has widespread group by keys, It's going to be optimized to produce just one M/R occupation. (This configuration property was eradicated in release 0.9.0.)
When enabled, dynamic partitioning column will likely be globally sorted. In this manner we can easily maintain only one document writer open for each partition worth from the reducer thus lessening the memory pressure on reducers.