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CREATE TRIGGER
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Authorization
CREATE TRIGGER
Syntax
Must have DBA privilege, RESOURCE privilege or SELECT privilege.
Related statements
DROP TABLE
Creates a trigger for the specified table. A trigger is a special type of automatically executed
stored procedure that helps ensure referential integrity for a database.
Triggers contain Java source code that can use SQL Java classes to carry out database
operations. Triggers are automatically activated when an INSERT, UPDATE, or DELETE statement
changes the trigger’s target table. The Java source code details what actions the trigger takes
when it is activated.
CREATE TRIGGER [ owner_name.]trigname
{ BEFORE | AFTER }
{ INSERT | DELETE | UPDATE [ OF column_name [ , ... ] ] }
ON table_name
[ REFERENCING { OLDROW [ ,NEWROW ] | NEWROW [ ,OLDROW ] } ]
[ FOR EACH { ROW | STATEMENT } ]
[ IMPORT
java_import_clause ]
BEGIN
java_snippet
END
owner_name
trigname
Specifies the owner of the trigger. If the name is different from the user name of the user
executing the statement, then the user must have DBA privileges.
Names the trigger. DROP TRIGGER statements specify the trigger name defined here. SQL
also uses trigname in the name of the Java class that it creates from the Java snippet.
BEFORE | AFTER
Denotes the trigger action time. The trigger action time specifies whether the triggered
action, implemented by java_snippet, executes BEFORE or AFTER the invoking INSERT,
UPDATE, or DELETE statement.
INSERT |DELETE |UPDATE [ OF column_name [ , ...] ]
Denotes the trigger event. The trigger event is the statement that activates the trigger.
If UPDATE is the triggering statement, this clause can include an optional column list. Only
updates to any of the specified columns will activate the trigger. If UPDATE is the triggering