GridDB Python Client

Overview

GridDB Python Client has been renewed.

New GridDB Python Client is developed using GridDB Java API(Java Client), JPype and Apache Arrow.

Operating environment

Building of the library and execution of the sample programs have been checked in the following environment.

OS: Ubuntu 22.04 (x64) / RockyLinux 9.4 (x64) / Windows 11 (x64) / MacOS 12 (x86_64)
Python: 3.12
Java: 8
GridDB Java API: V5.8 CE
GridDB server: V5.8 CE, Ubuntu 22.04 (x64)

QuickStart

This repository includes GridDB Python Client and GridDB JavaAPI Adapter for Apache Arrow. GridDB Python Client needs GridDB JavaAPI Adapter for Apache Arrow.

Preparations

(GridDB JavaAPI Adapter for Apache Arrow)

$ cd java
$ mvn install
$ cd ..

The following file is created under target/ folder.

• gridstore-arrow-X.Y.Z.jar

(GridDB Python Client)

$ cd python
$ python -m pip install .
$ cd ..

JPype, pyarrow, GridDB Python Client(griddb_python) are installed.

How to run sample (on Linux, Ubuntu, MacOS)

Install GridDB Server.
GridDB Server need to be started in advance.

$ cd sample

1. Download GridDB Java API on sample folder

$ curl -L -o gridstore.jar https://repo1.maven.org/maven2/com/github/griddb/gridstore/5.8.0/gridstore-5.8.0.jar

2. Place GridDB JavaAPI Adapter for Apache Arrow on sample folder

$ cp ../java/target/gridstore-arrow-X.Y.Z.jar gridstore-arrow.jar

3. Run sample

$ python3 sample1.py <GridDB notification address> <GridDB notification port>
    <GridDB cluster name> <GridDB user> <GridDB password>
  --> Person: name=name02 status=False count=2 lob=[65, 66, 67, 68, 69, 70, 71, 72, 73, 74]

Note:

Please insert the following description in python code.

import jpype
jpype.startJVM(classpath=["./gridstore.jar", "./gridstore-arrow.jar"])
import griddb_python as griddb

When you set the path of gridstore.jar and gridstore-arrow.jar into the environment variable "CLASSPATH", You can use GridDB Python Client without "import jpype" and "startJVM()" like old GridDB Python Client.

$ export CLASSPATH=$CLASSPATH:./gridstore.jar:./gridstore-arrow.jar

import griddb_python as griddb

Function

(Available)

• STRING, BOOL, BYTE, SHORT, INTEGER, LONG, FLOAT, DOUBLE, TIMESTAMP(milli-second), BLOB type for GridDB
• Put single row, get row with key
• Normal query, aggregation with TQL
• Multi-Put/Get/Query (batch processing)
• Compsite RowKey, Composite Index GEOMETRY type and TIMESTAP(micro/nano-second) type [since Python Client V5.8]
• Put/Get/Fetch with Apache Arrow [since Python Client V5.8]
• Operations for Partitioning table [since Python Client V5.8]

(Not available compared to Python Client V0.8)

• Array type for GridDB
• Timeseries-specific function
• Implicit data type conversion

Please refer to the following files for more detailed information.

• Python Client API Reference(Japanese)

Community

• Issues
  Use the GitHub issue function if you have any requests, questions, or bug reports.
• PullRequest
  Use the GitHub pull request function if you want to contribute code. You'll need to agree GridDB Contributor License Agreement(CLA_rev1.1.pdf). By using the GitHub pull request function, you shall be deemed to have agreed to GridDB Contributor License Agreement.

License

GridDB Python Client source license is Apache License, version 2.0.

Trademarks

Apache Arrow, Arrow are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries.