commit | 3b9bbefbaf8ddb3116952caf8c15b97d676386a7 | [log] [tgz] |
---|---|---|
author | Wing Yew Poon <wypoon@cloudera.com> | Wed May 20 19:37:20 2020 +0200 |
committer | Marco Gaido <mgaido@apache.org> | Wed May 20 19:37:20 2020 +0200 |
tree | 9331a17d22a594c59b9d037feb84c04151ef4536 | |
parent | ee7fdfc45d90c0478dcd446bc8a19a217eebe04d [diff] |
[LIVY-754][THRIFT] Encode precision and scale for decimal type. ## What changes were proposed in this pull request? When a `org.apache.livy.thriftserver.session.DataType.DECIMAL` is converted to a `org.apache.hive.service.rpc.thrift.TTypeDesc` for sending a Thrift response to a client request for result set metadata, the `TTypeDesc` contains a `TPrimitiveTypeEntry(TTypeId.DECIMAL_TYPE)` without `TTypeQualifiers` (which are needed to capture the precision and scale). With this change, we include the qualifiers in the `TPrimitiveTypeEntry`. We use both the name and the `DataType` of a field type to construct the `TTypeDesc`. We are able to do this without changing the existing internal representation for data types because we can obtain the precision and scale from the name of the decimal type. ## How was this patch tested? Use beeline to connect to the Thrift server. Do a select from a table with a column of decimal type. Also extended an existing integration test. Author: Wing Yew Poon <wypoon@cloudera.com> Closes #288 from wypoon/LIVY-754.
Apache Livy is an open source REST interface for interacting with Apache Spark from anywhere. It supports executing snippets of code or programs in a Spark context that runs locally or in Apache Hadoop YARN.
Pull requests are welcomed! But before you begin, please check out the Contributing section on the Community page of our website.
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Required python packages for building Livy:
To run Livy, you will also need a Spark installation. You can get Spark releases at https://spark.apache.org/downloads.html.
Livy requires Spark 2.2+. You can switch to a different version of Spark by setting the SPARK_HOME
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Livy is built using Apache Maven. To check out and build Livy, run:
git clone https://github.com/apache/incubator-livy.git cd incubator-livy mvn package
By default Livy is built against Apache Spark 2.2.0, but the version of Spark used when running Livy does not need to match the version used to build Livy. Livy internally handles the differences between different Spark versions.
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