Package org.hsqldb

Interface Trigger

All Known Implementing Classes:
TriggerSample

public interface Trigger
The interface an HSQLDB TRIGGER must implement. The user-supplied class that implements this must have a default constructor.
Since:
1.7.0
Author:
Peter Hudson
  • Field Details

  • Method Details

    • fire

      void fire(int type, String trigName, String tabName, Object[] oldRow, Object[] newRow)
      The method invoked upon each triggered action.

      When UPDATE triggers are fired, oldRow contains the existing values of the table row and newRow contains the new values.

      For INSERT triggers, oldRow is null and newRow contains the table row to be inserted. For DELETE triggers, newRow is null and oldRow contains the table row to be deleted. type contains the integer index id for trigger type, e.g. TriggerDef.INSERT_AFTER (fredt@users)

      Parameters:
      trigName - the name of the trigger
      tabName - the name of the table upon which the triggered action is occuring
      oldRow - the old row
      newRow - the new row