ALTER TRIGGER ON name INSTEAD OF INSERT|UPDATE|DELETE (AS FOR EACH ROW block) | (ENABLED|DISABLED)Alter Trigger
Usage:
Syntax Rules:
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The target, name, must be an updatable view. 
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Triggers are not yet true schema objects. They are scoped only to their view and have no name. 
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An Update Procedures (Triggers) must already exist for the given trigger event. 
| Note | If the default inherent update is chosen in Teiid Designer, any SQL associated with update (shown in a greyed out text box) is not part of the VDB and cannot be enabled with an alter trigger statement. |