Complete instruction in a trigger

Hi...
People, i wanna know how can i know inside of a function whar the 
trigger called, i mean which instruction SQL it called.

I do not wanna know if it´s a insert, update or delete (tp_op), i need 
to know the complete instruction.

For example, i need to know something like this:

update phones set number = '9999-2222';

Do you know if maybe exists a tg_stantement?

Thanks very much... see ya


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