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Greatest amount of objects (tables/partitions) can be retrieved from metastore in one batch. The higher the quantity, the considerably less the volume of spherical journeys is needed to the Hive metastore server, but it surely may also trigger larger memory necessity in the client side.
Annotation on the operator tree with statistics data demands column statistics. Column statistics are fetched through the metastore.
This home is used in LDAP lookup queries when acquiring LDAP team names that a particular user belongs to. The value in the LDAP attribute, indicated by this residence, ought to be a complete DN with the user or perhaps the short username or userid.
Aside from the configuration Qualities outlined During this area, some HiveServer2 Attributes are stated in other sections:
To estimate the size of data flowing via operators in Hive/Tez (for reducer estimation and so on.), common row dimension is multiplied with the whole quantity of rows coming out of each and every operator.
This flag must be set to accurate to enable vectorized manner of query execution. The default value is fake.
In unsecure method, legitimate will trigger the metastore to execute DFS functions utilizing the consumer's documented consumer and team permissions.
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No matter whether to read here optimize multi group by question to create just one M/R task approach. In the event the multi group by question has widespread group by link keys, It will probably be optimized to deliver one M/R task.
If the amount of keys in a very dictionary is bigger than this portion of the total quantity of non-null rows, convert off dictionary encoding. Use one to normally use dictionary encoding.
A comma separated list of builtin UDFs that aren't allowed to be executed. A UDF that is definitely included in the checklist will return an error if invoked from a question.
Identify from the identifier manufacturing unit about his to work with when producing desk/column names and so forth. 'datanucleus' is used for backward compatibility.
String employed like a prefix when car making column alias. By default the prefix label is going to be appended having a column posture selection to kind the column alias. Auto era would take place if an combination functionality is Utilized in a pick clause with out an express alias.