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Allow JDO question pushdown for integral partition columns in metastore. Off by default. This improves metastore efficiency for integral columns, especially if there is certainly a lot of partitions.
When hive.optimize.limittranspose is correct, this variable specifies the small reduction within the amount of tuples on the outer enter of your sign up for or enter of the union that the optimizer ought to get in an effort to implement the rule.
In Hive 0.thirteen.0 and later, if hive.stats.trusted is false and statistics could not be computed correctly, the operation can nonetheless be successful and update the statistics but it sets a partition residence "areStatsAccurate" to false. If the application desires exact statistics, they're able to then be received from the history.
The string the regex are going to be matched against is of the following kind, the place ex is a SQLException:
How many rows While using the similar crucial benefit needs to be cached in memory for every sort-merge-bucket joined table.
The utmost memory for use by map-aspect team aggregation hash table. In case the memory usage is increased than this selection, force to flush knowledge.
Either the location of the HiveServer2 world-wide init file or perhaps a Listing containing a .hiverc file. Should the residence is set, the worth has to be a sound path to an init file or Listing exactly where the init file is found.
To operate the MSCK Repair service Desk command batch-wise. When there is a large number of untracked partitions, by configuring a value into the home it can execute in batches internally. The default price of the home is zero, which means it's going to execute all of the partitions without delay.
If the version of Hadoop that's running supports sub-directories for tables/partitions. Numerous Hive optimizations could be utilized If your Hadoop Variation supports sub-directories for tables/partitions. This support was additional by MAPREDUCE-1501.
A comma divided list of hooks which apply QueryLifeTimeHook. These will likely be triggered ahead of/right after question compilation and right before/right after query execution, during the purchase specified.
Reserved length click to find out more for postfix of statistics key. At present only meaningful for counter type statistics which should continue to keep the duration of the complete statistics crucial smaller sized than the maximum length configured by hive.
Percentage of full memory for use by map-facet team aggregation hash desk, when this group by is accompanied by map be a part of.
Annotation with the operator tree with statistics information and facts calls for partition amount primary statistics like range of rows, details sizing and file sizing. more helpful hints Partition statistics are fetched within the metastore. Fetching partition statistics for every essential partition might be high-priced if the quantity of partitions is large.