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Writing DDE to MySQL

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.

 

dde-to-mysql1

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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