Connecting a schema holder
As described previously, connection can take place automatically using the information that you enter when you create a schema holder. In addition, OpenEdge provides the following techniques for connecting to a schema holder:
- Use the Data Dictionary or Data Administration tool. From the main menu, select Database
Connect and supply the schema holder’s physical name and the appropriate connection parameters. You connect to the data source when you select it as your working database.You cannot use the Utilities Auto–Connect option to connect to an ODBC data source. - Use the Progress 4GL
CONNECTstatement (see its reference entry in the OpenEdge Development: Progress 4GL Reference ). ACONNECTstatement must first list the schema holder and related connection parameters, then the ODBC data source and related parameters.
For example, this command connects a schema holder named holder and an ODBC-supported data source named odbdemo:
You can use combinations of different connection techniques. For example, you can connect the schema holder at startup, then connect to the DataServer using the Progress CONNECT statement. Any combination of connection techniques works, as long as you first connect to the schema holder and then the ODBC data source.
If you are not updating the schema holder, you can specify the Read-only (-RO) connection parameter to enhance DataServer performance.
If you connect to the schema holder and the ODBC data source in a single startup command or connection statement, be sure to specify parameters that affect the schema holder before the Database Name (-db) parameter. Specify only those parameters that affect the ODBC data source connection after the -db parameter.
The following section explains how to connect both a schema holder and an ODBC data source when you start up OpenEdge.