gandiva | Vectorized processing for Apache Arrow

 by   dremio C++ Version: Current License: No License

kandi X-RAY | gandiva Summary

kandi X-RAY | gandiva Summary

gandiva is a C++ library typically used in Big Data, Spark applications. gandiva has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Vectorized processing for Apache Arrow
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              gandiva has a low active ecosystem.
              It has 438 star(s) with 54 fork(s). There are 85 watchers for this library.
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              It had no major release in the last 6 months.
              gandiva has no issues reported. There are 2 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of gandiva is current.

            kandi-Quality Quality

              gandiva has no bugs reported.

            kandi-Security Security

              gandiva has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              gandiva does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
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              Without a license, all rights are reserved, and you cannot use the library in your applications.

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              gandiva releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.

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            gandiva Key Features

            No Key Features are available at this moment for gandiva.

            gandiva Examples and Code Snippets

            No Code Snippets are available at this moment for gandiva.

            Community Discussions

            QUESTION

            A fatal error has been detected by the Java Runtime Environment when ignite native persistence is on
            Asked 2021-Jun-01 at 11:11

            I try to put Apache Arrow vector in Ignite, this is working fine when I turn off native persistence, but after I turn on native persistence, JVM is crashed every time. I create IntVector first then put it in Ignite:

            ...

            ANSWER

            Answered 2021-Jun-01 at 11:11

            Apache Arrow utilizes a pretty similar idea of Java off-heap storage as Apache Ignite does. For Apache Arrow it means that objects like IntVector don't actually store data in their on-heap layout. They just store a reference to a buffer containing an off-heap address of a physical representation. Technically it's a long offset pointing to a chunk of memory within JVM address space.

            When you restart your JVM, address space changes. But in your Apache Ignite native persistence there's a record holding an old pointer. It leads to a SIGSEGV because it's not in the JVM address anymore (in fact it doesn't even exist after a restart).

            You could use Apache Arrow serialization machinery to store data permanently in Apache Ignite or even somewhere else. But in fact after that you're going to lose Apache Arrow preciousness as a fast in-memory columnar store. It was initially designed to share off-heap data across multiple data-processing solutions.

            Therefore I believe that technically it could be possible to leverage Apache Ignite binary storage format. In that case a custom BinarySerializer should be implemented. After that it would be possible to use it with the Apache Arrow vector classes.

            Source https://stackoverflow.com/questions/67734205

            QUESTION

            PyArrow installation for Xbbg doesn't work
            Asked 2019-Jul-25 at 12:33

            I'm trying to set up a data pipeline between Bloomberg and Python. I have a Bloomberg terminal, a Windows 64-bit machine, Python 3.7.4 and a Sublime Text environment up and working. My goal is to install the XBBG package: https://pypi.org/project/xbbg/.

            I've followed the steps on https://pypi.org/project/xbbg/ and I have installed:

            • Bloomberg C++ SDK version 3.12.1 or higher
            • Bloomberg Open API (need to install manually as shown below)
            • pdblp - pandas wrapper for Bloomberg Open API
            • numpy, pandas, ruamel.yaml

            However the pip install pyarrow installation does not work (see traceback below), even when I tried earlier versions of pyarrow.

            ...

            ANSWER

            Answered 2019-Jul-25 at 12:33

            QUESTION

            Access Gadiva filter result by index in Apache Arrow
            Asked 2018-Dec-14 at 18:24

            Maybe I'm missing something obvious, but for the life of me, I can't figure out how I can access the elements of an array after a Gandiva filter operation.

            I have linked a minimal example which I compile like this:

            ...

            ANSWER

            Answered 2018-Dec-14 at 18:24

            The SelectionVector stores indices, so the type is unsigned, the following works:

            Source https://stackoverflow.com/questions/53750405

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install gandiva

            You can download it from GitHub.

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            The core functionality of Gandiva is implemented in C++. Language bindings are provided for Java.
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            https://github.com/dremio/gandiva.git

          • CLI

            gh repo clone dremio/gandiva

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            git@github.com:dremio/gandiva.git

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