Create trigger programs

These topics discuss how to create and work with trigger programs.

1. Supply a trigger program. You can write a trigger program in a high-level language (HLL), Structured Query Language (SQL), or control language (CL).
2. Use one of the following methods to add the trigger:
   • The Add Physical File Trigger (ADDPFTRG) command. You must specify your trigger program in the trigger program (PGM) parameter on the command.
   • Add a trigger using iSeries™ Navigator.
   • The CREATE TRIGGER SQL statement.

• Add triggers using iSeries Navigator
  Using iSeries Navigator, you can define system triggers and SQL triggers. Additionally, you can enable or disable a trigger on a physical database file.
• How trigger programs work
  When a user or application issues a change or read operation on a database file that has an associated trigger, the operation calls the appropriate trigger program or programs.
• Other important information about working with triggers
  These topics discuss recommendations, precautions, and error messages for trigger programs. Information about monitoring and commitment control is also included.
• Examples: Trigger programs
  This topic provides examples of trigger programs written in C, COBOL, and RPG.
• Trigger buffer sections
  The trigger buffer has two logical sections: a static section and a variable section.