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version 11.2 (Modified)
Database methods are methods that are automatically executed by 4D when a general session event occurs.
To create or open and edit a database method:
1. Open the Explorer window.
2. Select the Methods page.
3. Expand the Database Methods theme.
4. Double click on the method.
or:
1. Select the method.
2. Press Enter or Return.
You edit a database method in the same way as any other method.
You cannot call a database method from another method. Database methods are automatically invoked by 4D at certain points in a working session. The following table summarizes execution of database methods:
| Database Method | 4D local | 4D Server | 4D remote |
| On Startup | Yes, Once | No | Yes, Once |
| On Exit | Yes, Once | No | Yes, Once |
| On Drop | Yes, Multiple | No | Yes, Multiple |
| On Web Connection | Yes, Multiple | Yes, Multiple | Yes, Multiple |
| On Web Authentication | Yes, Multiple | Yes, Multiple | Yes, Multiple |
| On Backup Startup | Yes, Multiple | Yes, Multiple | Yes, Multiple |
| On Backup Shutdown | Yes, Multiple | Yes, Multiple | Yes, Multiple |
| On Server Startup | No | Yes, Once | No |
| On Server Shutdown | No | Yes, Once | No |
| On Server Open Connection | No | Yes, Multiple | No |
| On Server Close Connection | No | Yes, Multiple | No |
| On SQL Authentication | Yes, Multiple | Yes, Multiple | Yes, Multiple |
For detailed information about each of the database methods, see the following sections:
• On Web Connection Database Method
• On Web Authentication Database Method
• On Backup Startup Database Method
• On Backup Shutdown Database Method
• On SQL Authentication Database Method
• On Server Startup Database Method (4D Server Reference manual)
• On Server Shutdown Database Method (4D Server Reference manual)
• On Server Open Connection Database Method (4D Server Reference manual)
• On Server Close Connection Database Method (4D Server Reference manual)
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