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apache / impala / 21c50f8dbb7ef75dbb56bee07590a710993f4d64
commit21c50f8dbb7ef75dbb56bee07590a710993f4d64[log] [tgz]
authorVihang Karajgaonkar <vihangk1@apache.org>Tue Aug 25 12:22:26 2020 -0700
committerVihang Karajgaonkar <vihang@cloudera.com>Wed Aug 26 17:08:43 2020 +0000
treeed61b9d7e7cbab769b714b5f23d0f638e4eba4a0
parent28d94851b1418ddd57e4c046646f7a2df0e702d7 [diff]
IMPALA-4364: [Addendum] Compare specific fields in StorageDescriptor

The query option REFRESH_UPDATED_HMS_PARTITIONS was introduced
earlier in IMPALA-4364 to detect changes in the partition
objects in HMS when a refresh table command is issued. Originally,
it relied on using the StorageDescriptor#equals() method to
determine if the Partition in catalogd is same as partition
in HMS with while executing the refresh statement.

However, using StorageDescriptor#equals() is dependent on HMS
version and may introduce inconsistent behaviors after upgrades.
For example, when we backported the original patch to older
distribution which uses Hive-2, the SkewedInfo field of
StorageDescriptor is not null. This field causes the comparison
logic to fail, since catalogd doesn't store the SkewedInfo
field in the cached StorageDescriptor to optimize memory usage.

This patch modifies the comparison logic to use explicit
implementation in HdfsPartition class which compares only
some fields which are cached in the HdfsPartition object.

Testing:
1. Added a new test for the comparison method.
2. Modified existing test for the query option.

Change-Id: I90c797060265f8f508d0b150e15da3d0f9961b9b
Reviewed-on: http://gerrit.cloudera.org:8080/16363
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Reviewed-by: Vihang Karajgaonkar <vihang@cloudera.com>
4 files changed
tree: ed61b9d7e7cbab769b714b5f23d0f638e4eba4a0
  1. be/
  2. bin/
  3. cmake_modules/
  4. common/
  5. docker/
  6. docs/
  7. ext-data-source/
  8. fe/
  9. impala-parent/
  10. infra/
  11. lib/
  12. query-event-hook-api/
  13. security/
  14. shaded-deps/
  15. shell/
  16. ssh_keys/
  17. testdata/
  18. tests/
  19. www/
  20. .clang-format
  21. .clang-tidy
  22. .gitattributes
  23. .gitignore
  24. buildall.sh
  25. CMakeLists.txt
  26. EXPORT_CONTROL.md
  27. LICENSE.txt
  28. LOGS.md
  29. NOTICE.txt
  30. README-build.md
  31. README.md
  32. setup.cfg
README.md

Welcome to Impala

Lightning-fast, distributed SQL queries for petabytes of data stored in Apache Hadoop clusters.

Impala is a modern, massively-distributed, massively-parallel, C++ query engine that lets you analyze, transform and combine data from a variety of data sources:

  • Best of breed performance and scalability.
  • Support for data stored in HDFS, Apache HBase, Apache Kudu, Amazon S3, Azure Data Lake Storage, Apache Hadoop Ozone and more!
  • Wide analytic SQL support, including window functions and subqueries.
  • On-the-fly code generation using LLVM to generate lightning-fast code tailored specifically to each individual query.
  • Support for the most commonly-used Hadoop file formats, including Apache Parquet and Apache ORC.
  • Support for industry-standard security protocols, including Kerberos, LDAP and TLS.
  • Apache-licensed, 100% open source.

More about Impala

To learn more about Impala as a business user, or to try Impala live or in a VM, please visit the Impala homepage. Detailed documentation for administrators and users is available at Apache Impala documentation.

If you are interested in contributing to Impala as a developer, or learning more about Impala's internals and architecture, visit the Impala wiki.

Supported Platforms

Impala only supports Linux at the moment.

Export Control Notice

This distribution uses cryptographic software and may be subject to export controls. Please refer to EXPORT_CONTROL.md for more information.

Build Instructions

See Impala's developer documentation to get started.

Detailed build notes has some detailed information on the project layout and build.