https://github.com/toddtreece/lib_mysqludf_mongodb

MySQL UDF for inserting data into MongoDB
https://github.com/toddtreece/lib_mysqludf_mongodb

Last synced: about 2 months ago
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MySQL UDF for inserting data into MongoDB

• Host: GitHub
• URL: https://github.com/toddtreece/lib_mysqludf_mongodb
• Owner: toddtreece
• License: gpl-3.0
• Created: 2011-10-11T21:55:03.000Z (almost 13 years ago)
• Default Branch: master
• Last Pushed: 2012-02-03T21:33:28.000Z (over 12 years ago)
• Last Synced: 2024-04-06T08:34:49.713Z (6 months ago)
• Language: C
• Homepage:
• Size: 138 KB
• Stars: 16
• Watchers: 3
• Forks: 6
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# lib_mysqludf_mongodb

lib_mysqludf_mongodb

Copyright 2011 Todd Treece

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program.  If not, see [http://www.gnu.org/licenses/](http://www.gnu.org/licenses/).

## Hunh?

The goal of the project is to allow MySQL triggers to store data in MongoDB.  By tracking MySQL changes (inserts/updates/deletes) in MongoDB, backing up system critical data will become faster and easier.

## Requirements

*  [MongoDB C Driver](http://www.mongodb.org/display/DOCS/C+Language+Center)

*  libmysql-dev

## Installation

### Tested on Ubuntu Server 10.04.3 LTS x86_64

* MongoDB version v1.2.2

* MySQL version 5.1.41-3ubuntu12.10

* gcc version 4.4.3

  

### Compiling lib_mysqludf_mongodb

* Use git to clone the Mongo C Driver repo into /usr/local/lib

* Complile the latest version of MongoDB C Diver using the instructions provided [here](http://api.mongodb.org/c/current/building.html).  * Do not use v0.4 of the driver as the instructions state. Compile using HEAD. *

- - -

    $ gcc --std=c99 -shared -Wall -fPIC \

      -I/usr/include/mysql \

      -I/usr/local/lib/mongo-c-driver/src \

      /usr/lib/libmongoc.so \

      /usr/lib/libbson.so \

      server.c \

      io.c \

      version.c \

      encodings.c \

      -o lib_mysqludf_mongodb.so

    $ sudo cp lib_mysqludf_mongodb.so /usr/lib/mysql/plugin/lib_mysqludf_mongodb.so

    $ sudo service mysql restart

### Registering the UDF functions with MySQL

    USE mysql;

    DROP FUNCTION IF EXISTS mongodb_udf_version;

    DROP FUNCTION IF EXISTS mongodb_connect;

    DROP FUNCTION IF EXISTS mongodb_disconnect;

    DROP FUNCTION IF EXISTS mongodb_save;

    CREATE FUNCTION mongodb_udf_version RETURNS STRING SONAME "lib_mysqludf_mongodb.so";

    CREATE FUNCTION mongodb_connect RETURNS STRING SONAME "lib_mysqludf_mongodb.so";

    CREATE FUNCTION mongodb_disconnect RETURNS STRING SONAME "lib_mysqludf_mongodb.so";

    CREATE FUNCTION mongodb_save RETURNS STRING SONAME "lib_mysqludf_mongodb.so";

## Usage

    -- connecting to mongoDB:

    -- this will only need to be called once

    -- and can be placed in a mysql startup script.

    --

    -- in my.cnf add a line in the [mysqld] block

    -- that points to your startup script.

    -- i.e. init-file = /var/lib/mysql/init.sql

    SELECT mongodb_connect("127.0.0.1", 27017);

    -- sample query

    SELECT mongodb_save('test.customers' AS 'collection', firstname, lastname) FROM customers ORDER BY id DESC LIMIT 0,10;

    -- mongodb insert from mysql trigger sample  --

    DELIMITER $$

    DROP TRIGGER IF EXISTS mongodb_update_trigger $$

     

    CREATE TRIGGER mongodb_update_trigger BEFORE UPDATE ON users

      

      FOR EACH ROW BEGIN

      

        SET @save = (

          SELECT mongodb_save(

            'history.users' AS 'collection',

            NEW.id AS 'id',

            NEW.username AS 'username',

            NEW.firstname AS 'firstname', 

            NEW.lastname  AS 'lastname',

            NEW.email AS 'email',

            'update' AS 'history_type',

            NOW() AS 'timestamp'

          )

        );

     

      END;

    $$

    DELIMITER ;

    -- end trigger sample --

    -- disconnect from mongoDB

    SELECT mongodb_disconnect();