https://github.com/apache/datasketches-hive

Sketch adaptors for Hive.
https://github.com/apache/datasketches-hive

datasketches

Last synced: 10 months ago
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Sketch adaptors for Hive.

• Host: GitHub
• URL: https://github.com/apache/datasketches-hive
• Owner: apache
• License: apache-2.0
• Created: 2015-06-30T00:22:28.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2025-02-24T00:46:07.000Z (11 months ago)
• Last Synced: 2025-03-29T08:10:00.034Z (10 months ago)
• Topics: datasketches
• Language: Java
• Homepage: https://datasketches.apache.org
• Size: 880 KB
• Stars: 50
• Watchers: 20
• Forks: 22
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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=================

# DataSketches Java UDF/UDAF Adaptors for Apache Hive 

Please visit the main [DataSketches website](https://datasketches.apache.org) for more information. 

If you are interested in making contributions to this site please see our [Community](https://datasketches.apache.org/docs/Community/) page for how to contact us.

---

### Hadoop Hive UDFs/UDAFs

See relevant sections under the different sketch types in Java Core Documentation.

## Build Instructions

__NOTE:__ This component accesses resource files for testing. As a result, the directory elements of the full absolute path of the target installation directory must qualify as Java identifiers. In other words, the directory elements must not have any space characters (or non-Java identifier characters) in any of the path elements. This is required by the Oracle Java Specification in order to ensure location-independent access to resources: [See Oracle Location-Independent Access to Resources](https://docs.oracle.com/javase/8/docs/technotes/guides/lang/resources.html)

### JDK8 is required to compile

This DataSketches component is pure Java and you must compile using JDK 8.

### Recommended Build Tool

This DataSketches component is structured as a Maven project and Maven is the recommended Build Tool.

There are two types of tests: normal unit tests and tests run by the strict profile.  

To run normal unit tests:

    $ mvn clean test

To run the strict profile tests:

    $ mvn clean test -P strict

To install jars built from the downloaded source:

    $ mvn clean install -DskipTests=true

This will create the following jars:

* datasketches-hive-X.Y.Z-incubating.jar The compiled main class files.

* datasketches-hive-X.Y.Z-incubating-tests.jar The compiled test class files.

* datasketches-hive-X.Y.Z-incubating-sources.jar The main source files.

* datasketches-hive-X.Y.Z-incubating-test-sources.jar The test source files

* datasketches-hive-X.Y.Z-incubating-javadoc.jar  The compressed Javadocs.

### Dependencies

#### Run-time

This has the following top-level dependencies:

* org.apache.datasketches : datasketches-java

* org.apache.hive : hive-exec

* org.apache.hadoop : hadoop-common

* org.apache.hadoop : hadoop-mapreduce-client-core

#### Testing

See the pom.xml file for test dependencies.