DDE to MySQL: Writing DDE to MySQL database

DDE TO MYSQL: WRITING DDE TO MYSQL DATABASE

Configuring how to write DDE data to a MySQL database is very much similar to configuring how to write data to MSSQL. Only main differences are described in this manual.

1. Download and install the 32-bit version of MySQL ODBC Connector (the ODBC driver) for MySQL from mysql.org.

Fig. 1 Driver section

2. The structure of a table in the database will look like this:

2.1 In case of writing a lot of DDE items

CREATE TABLE `dde_data` ( `REC_ID` int(11) NOT NULL AUTO_INCREMENT, `TIMESTAMP` datetime DEFAULT NULL, `ITEM_NAME` varchar(25) NOT NULL, `ITEM_VALUE` varchar(255) DEFAULT NULL, PRIMARY KEY (`REC_ID`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1;

2.2 In case of writing several DDE items

CREATE TABLE `dde_data_2` ( `REC_ID` int(11) NOT NULL AUTO_INCREMENT, `TIMESTAMP` datetime NOT NULL, `ITEM1` varchar(30) DEFAULT NULL, `ITEM2` varchar(30) DEFAULT NULL, PRIMARY KEY (`REC_ID`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1;

If you specify any other data type than String for ITEM1 or ITEM2 in the DDE settings, you should create the columns of the corresponding types while creating a table.

3. Create an ODBC data source for your MySQL database.

4. During “Binding”, you should take into account that the names of the table and its columns are case-sensitive in MySQL.

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