mirror of
https://github.com/apache/impala.git
synced 2026-01-07 09:02:19 -05:00
d2d3f4c1a6
This uses the existing infrastructure for codegening builtin UDAs and for codegening calls to UDFs. GetUdf() is refactored to support both UDFs and UDAs. IR UDAs are still not allowed by the frontend. It's unclear if we want to enable them going forward because of the difficulties in testing and supporting IR UDFs/UDAs. This also fixes some bugs with the Get*Type() methods of FunctionContext. GetArgType() and related methods now always return the logical input types of the aggregate function. Getting the tests to pass required fixing IMPALA-4878 because they called GetIntermediateType(). Testing: test_udfs.py tests UDAs with codegen enabled and disabled. Added some asserts to test UDAs to check that the correct types are passed in via the FunctionContext. Change-Id: Id1708eaa96eb76fb9bec5eeabf209f81c88eec2f Reviewed-on: http://gerrit.cloudera.org:8080/5161 Reviewed-by: Dan Hecht <dhecht@cloudera.com> Tested-by: Impala Public 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.
Supported Platforms
Impala only supports Linux at the moment.
Build Instructions
See bin/bootstrap_build.sh.
Export Control Notice
This distribution uses cryptographic software and may be subject to export controls. Please refer to EXPORT_CONTROL.md for more information.