If ORC reader encounters corrupt data, this price will likely be utilized to find out no matter if to skip the corrupt knowledge or toss an exception. The default conduct should be to toss an exception.
Other than the configuration Attributes stated On this portion, some Attributes in other sections may also be linked to ORC:
This flag ought to be set to accurate to enable vectorized method of your cut down-facet Team BY question execution. The default value is correct.
When real, holds a lock file from the scratch Listing. If a Hive approach dies and accidentally leaves a dangling scratchdir behind, the cleardanglingscratchdir Software will remove it.
A comma separated list of hooks which put into practice QueryLifeTimeHook. These will be brought on just before/right after query compilation and in advance of/after query execution, in the get specified.
A summary of comma divided values equivalent to YARN queues of precisely the same name. When HiveServer2 is released in Tez manner, this configuration really should be set for a number of Tez periods to run in parallel over the cluster.
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True: Validate that Variation info saved in metastore matches with one particular from Hive jars. Also disable automatic schema migration endeavor (see datanucleus.
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Maximum dimension (in bytes) with the inputs on which a compact index is immediately utilised. A destructive quantity is akin to infinity.
A comma divided list of hooks which employ QueryLifeTimeHook. These will probably be brought on prior to/just after query compilation and just before/after query execution, in the buy specified.
Whether or not to help TCP keepalive for the metastore server. Keepalive will stop accumulation of fifty percent-open connections.
Apart from the configuration properties shown On this part, some properties in other sections will also be related to ORC:
Annotation with the operator tree with statistics information and facts requires partition level basic statistics like amount of rows, facts size and file sizing. Partition statistics are fetched in the metastore. Fetching partition statistics for every desired partition is usually costly when the number of partitions is superior.