Sri lanka web server - APPENDIX B n HIBERNATE TOOLS 275 n HIBERNATE
APPENDIX B n HIBERNATE TOOLS 275 n HIBERNATE TOOLS 275 nCaution There are currently no safeguards built in here. If the configured database user has table deletion privileges, running SchemaExport in this way will drop and re-create all of your tables with no further warning! If you select Run SchemaExport from this menu, the database view will be updated to reflect the changes, and you will be able to drill down to view the individual table column names and data types, as shown in Figure B-15. Figure B-15. A column-level view of the newly generated database nNote When you run SchemaExport for the first time, you may see error messages in the event log view related to attempts to drop nonexistent tables. These result from unconditional DROP commands to remove preexisting tables. They should go away if you run SchemaExport a second time and assuming this is the case, they can be safely ignored. As always, given that the tools are still beta versions at the time of writing, this behavior may have improved by the time you read this book. This view does not offer the sort of comprehensive access to the database metadata that is available from some tools, and it does not permit you to directly change any of the features. It does, however, offer a useful visual confirmation that the appropriate tables and columns have been created. Running the Test Program For the purpose of generating some test data for manipulation in the remainder of this section, we have created a test application (available with the other source code for this book on the Apress web site) to populate the database with some suitable records. Now that you have created an appropriate database schema, it is possible to run this application. Switch back to the Java perspective and add a new Java Application run configuration for the PopulateNotesclass. You will need to add the path to your JDBC driver to the configuration on the Classpath tab.
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