kdeschle opened a new pull request, #4902:
URL: https://github.com/apache/hive/pull/4902
<!--
Thanks for sending a pull request! Here are some tips for you:
1. If this is your first time, please read our contributor guidelines:
https://cwiki.apache.org/confluence/display/Hive/HowToContribute
2. Ensure that you have created an issue on the Hive project JIRA:
https://issues.apache.org/jira/projects/HIVE/summary
3. Ensure you have added or run the appropriate tests for your PR:
4. If the PR is unfinished, add '[WIP]' in your PR title, e.g.,
'[WIP]HIVE-XXXXX: Your PR title ...'.
5. Be sure to keep the PR description updated to reflect all changes.
6. Please write your PR title to summarize what this PR proposes.
7. If possible, provide a concise example to reproduce the issue for a
faster review.
-->
### What changes were proposed in this pull request?
Performance improvements to the Hive JDBC driver to allow for high
performance fetching.
<!--
Please clarify what changes you are proposing. The purpose of this section
is to outline the changes and how this PR fixes the issue.
If possible, please consider writing useful notes for better and faster
reviews in your PR. See the examples below.
1. If you refactor some codes with changing classes, showing the class
hierarchy will help reviewers.
2. If you fix some SQL features, you can provide some references of other
DBMSes.
3. If there is design documentation, please add the link.
4. If there is a discussion in the mailing list, please add the link.
-->
HIVE-27882: Fix missing classes in standalone jar [Michael Smith]
HIVE-27886: Configure Hadoop security for Kerberos when required [Michael
Smith]
HIVE-27887: Provide reasonable defaults for ResultSetMetaData [Michael Smith]
HIVE-27873: Fix getOperationStatus() handling and optimize result fetch path
[Kurt Deschler]
HIVE-27872: Support multi-stream parallel fetch in JDBC driver [Kurt
Deschler]
HIVE-27874: Support datatype conversion on fetch threads [Kurt Deschler]
### Why are the changes needed?
<!--
Please clarify why the changes are needed. For instance,
1. If you propose a new API, clarify the use case for a new API.
2. If you fix a bug, you can clarify why it is a bug.
-->
JDBC performance with large datasets was very slow, especially when
connected to Impala via HS2 protocol
### Does this PR introduce _any_ user-facing change?
<!--
Note that it means *any* user-facing change including all aspects such as
the documentation fix.
If yes, please clarify the previous behavior and the change this PR proposes
- provide the console output, description, screenshot and/or a reproducable
example to show the behavior difference if possible.
If possible, please also clarify if this is a user-facing change compared to
the released Hive versions or within the unreleased branches such as master.
If no, write 'No'.
-->
-new JDBC connection parameter 'fetchThreads'
-fetchSize is enforce for prepared statements
-JDBC standalone JAR can be dynamically loaded
-custom hiveconf is no longer required to use the JDBC jar
### Is the change a dependency upgrade?
<!--
If yes, please attach a file with output from mvn dependency:tree to
validate a complete upgrade of dependency.
If no, write 'No'.
-->
No
### How was this patch tested?
<!--
If tests were added, say they were added here. Please make sure to add some
test cases that check the changes thoroughly including negative and positive
cases if possible.
If it was tested in a way different from regular unit tests, please clarify
how you tested step by step, ideally copy and paste-able, so that other
reviewers can test and check, and descendants can verify in the future.
If tests were not added, please describe why they were not added and/or why
it was difficult to add.
-->
Ran existing JDBC regression tests
Manual testing multi-stream fetch against Impala
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: gitbox-unsubscr...@hive.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: gitbox-unsubscr...@hive.apache.org
For additional commands, e-mail: gitbox-h...@hive.apache.org
