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There are two ways to disable the emit Null column featureattribute:

1. Add the dbconnector.emitNullColumns=false property to the dbconnector properties file for your installation.

2. OR add the emitNullColumns="false" attribute to the respective element in the configuration.xml file for your installation:
   
   For example:

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Writing rules with http.post and http.put requests eliminates the need to use a Stored stored procedure to update/insert records into your database tables and then call that Stored Procedure from a business rule.

Stored Procedures

You can also execute stored procedures via the database connector. The Database Connector supports the use of Stored Procedures to update/insert data into a database table. Existing stored procedures can still be used. However, using the Post/Put to the Database Connector from a Business Rule accomplishes the same thing and is a more straight forward approach than using a stored procedure.

To use a stored procedure, you must:

• Create a stored procedure to update/insert the values into the database table
• Call this stored procedure in the <retrieve> tag of your configuration.xml query
• Use an http.get statement in your business rule to call this query. The stored procedure will execute and update/insert data into your table

Here is an example of a mySql stored procedure.

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To call this from the mySql command line you would use the command: call GetNewOrderNum(); To call this from the database connector you would add the following to the configuration.xml:

<query name="getOrderNumber">
    <retrieve>
        <statement> w
            call GetNewOrderNum() 
        </statement> 
   </retrieve> 
</query>

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