Chapter 5 | Section 5.2 |
Using JDBC/ODBC Operations | JDBC eWay Database Operations (JCD) |
operation. Check with the respective driver’s vendor for further information. This feature is known as Updatable ResultSet.
Note: Refer to the Javadoc for a full description of methods included in the JDBC eWay.
5.2.1The Table
A table OTD represents a database table. It consists of fields and methods. Fields correspond to the columns of a table while methods are the operations that you can apply to the OTD. This allows you to perform Query, Update, Insert, and Delete SQL operations in a table. The ability to update via a ResultSet is called “Updatable ResultSet”, which is a feature supported by this eWay.
By default, the Table OTD has UpdatableConcurrency and ScrollTypeForwardOnly. Normally you do not have to change the default setting.
The type of result returned by the select() method can be specified using:
SetConcurrencytoUpdatable
SetConcurrencytoReadOnly
SetScrollTypetoForwardOnly
SetScrollTypetoScrollSensitive
SetScrollTypetoInsensitive
The Query (Select) Operation
To perform a query operation on a table:
1Execute the select() method with the “where” clause specified if necessary.
2Loop through the ResultSet using the next() method.
3Process the return record within a while() loop.
For example:
package prjJDBC_JCDjcdALL;
public class jcdTableSelect
{
public com.stc.codegen.logger.Logger logger;
public com.stc.codegen.alerter.Alerter alerter;
public com.stc.codegen.util.CollaborationContext collabContext;
public com.stc.codegen.util.TypeConverter typeConverter;
public void receive( com.stc.connector.appconn.file.FileTextMessage input, dtd.otdInputDTD_1394195520.DBemployees otdInputDTD_DBemployees_1, otdJDBC.OtdJDBCOTD otdJDBC_1, dtd.otdOutputDTD882991309.DBemployee otdOutputDTD_DBemployee_1, com.stc.connector.appconn.file.FileApplication FileClient_1 )
throws Throwable
JDBC/ODBC eWay Adapter User’s Guide | 60 | Sun Microsytems, Inc. |
