Thread: RULES - Difference between DO and DO INSTEAD

Hello everybody

I'm building some rules for some views that I have, but I did'nt 
understand yet what's the difference between doing a rule with DO or 
with DO INSTEAD.
What's the diference ?

Thanks, Luis Sousa

Luis,

> I'm building some rules for some views that I have, but I did'nt
>  understand yet what's the difference between doing a rule with DO or
>  with DO INSTEAD.
> What's the diference ?

Simple:

CREATE RULE xxx ON UPDATE TO yyy WHERE www=zzz ...

DO ACTION: do the action, then go ahead and update the table.
DO INSTEAD ACTION: do the action, and *do not* update the table.

IMHO, the online docs on Rules and Triggers are quite good.  However,they are scattered around the online
documentation;some is in SQLCommands, some in Programmer's Guide.  Put in some effort into findingall the articles,
it'sworth it.
 

-Josh Berkus

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