https://github.com/ajermakovics/presto-hazelcast

PrestoDB connector for Hazelcast. Run SQL on an in-memory data grid.
https://github.com/ajermakovics/presto-hazelcast

Last synced: 12 months ago
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PrestoDB connector for Hazelcast. Run SQL on an in-memory data grid.

• Host: GitHub
• URL: https://github.com/ajermakovics/presto-hazelcast
• Owner: ajermakovics
• License: mit
• Created: 2014-10-05T11:05:38.000Z (almost 12 years ago)
• Default Branch: master
• Last Pushed: 2015-06-12T15:49:17.000Z (about 11 years ago)
• Last Synced: 2025-03-25T07:35:04.479Z (over 1 year ago)
• Language: HTML
• Homepage:
• Size: 556 KB
• Stars: 13
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
presto-hazelcast

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

[PrestoDb](http://prestodb.io/) connector for [Hazelcast](http://hazelcast.org/).

Presto is an open source distributed SQL query engine for running interactive analytic queries against data sources of all sizes ranging from gigabytes to petabytes. 

This is an **experiment** in using PrestoDb to run SQL queries on top of Hazelcast. It starts a PrestoDb server and an embedded Hazelcast instance. The connector is used to query maps as if they were tables. Objects in maps are treated as rows.

Usage

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

1. Start the server using gradle (2+). This will start the server on port 8383:

 - `gradle runServer`

 

2. Download presto [client](http://prestodb.io/docs/current/installation/cli.html) and run it using:

 - `./presto --server localhost:8383 --catalog hazelcast --schema maps` 

3. Run some SQL queries

 - `SHOW TABLES;` 

 - `SELECT active, SUM(sales) FROM employees GROUP BY active;`

 - Joins:

 - `SELECT departments.name, SUM(sales) FROM departments INNER JOIN employees ON id = department GROUP BY departments.name;`

The server comes with some example data in table *emplyees*.

You can connect to the embedded Hazelcast instance (port 5701) using a client and put some more data in.

Config

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

Config is in src/main/resources

Run from IDE

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

Main class: main.HazelcastPresto  

Wroking dir: src/main/resources  

JVM Args: -ea -Xmx1G -Dconfig=config.properties -Dlog.levels-file=log.properties  

The code for the connector itself is in the *plugin* package.

TODOs

=====

Lots of things to improve:

 - use map key as an id

 - make distributed and partiton aware

 - result paging

 - make configurable

 - ...