mirror of
https://github.com/apache/impala.git
synced 2026-01-04 18:00:57 -05:00
1a3d7ffd4f
Enforces that the planner treats IS NOT DISTINCT FROM as eligible for hash joins, but does not find the minimum spanning tree of equivalences for use in optimizing query plans; this is left as future work. Change-Id: I62c5300b1fbd764796116f95efe36573eed4c8d0 Reviewed-on: http://gerrit.cloudera.org:8080/710 Reviewed-by: Jim Apple <jbapple@cloudera.com> Tested-by: Internal Jenkins
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 and Amazon S3.
- Wide analytic SQL support, including window functions and subqueries.
- On-the-fly code generation using LLVM to generate CPU-efficient code tailored specifically to each individual query.
- Support for the most commonly-used Hadoop file formats, including the Apache Parquet (incubating) project.
- 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.
If you are interested in contributing to Impala as a developer, or learning more about Impala's internals and architecture, visit the Impala wiki.