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https://issues.apache.org/jira/browse/HIVE-23005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Mollitor updated HIVE-23005:
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Attachment: HIVE-23005.3.patch
> Consider Default JDBC Fetch Size From HS2
> -----------------------------------------
>
> Key: HIVE-23005
> URL: https://issues.apache.org/jira/browse/HIVE-23005
> Project: Hive
> Issue Type: Sub-task
> Components: JDBC
> Reporter: David Mollitor
> Assignee: David Mollitor
> Priority: Major
> Attachments: HIVE-23005.1.patch, HIVE-23005.2.patch,
> HIVE-23005.3.patch
>
>
> # Create two fetch sizes: and "init" fetch size and a "default" fetch size.
> The "init" fetch size comes from the JDBC connection string _fetchSize_ (if
> present) and the "default" fetch size comes from
> _HIVE_SERVER2_THRIFT_RESULTSET_DEFAULT_FETCH_SIZE_ the server response to the
> open session request.
> # When a {{Statement}} is created, its starting fetch size is the "init"
> fetch size (may be 0)
> # Manually setting the fetch size on the {{Statement}} to 0, sets the fetch
> size to be the server default
> Setting to zero defaults to the server's instructed default and adheres to:
> bq. If the value specified is zero, then the hint is ignored. The default
> value is zero.
> That is to say, if the fetch size is 0, the default from the server is used,
> otherwise the user can pass a 'hint' and that will be the number of rows
> fetched instead.
> https://docs.oracle.com/javase/8/docs/api/java/sql/Statement.html#setFetchSize-int-
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