Re: [HACKERS] PATCH: make plpgsql IN args mutable (v1)

Jeff Davis wrote:
> If mutable IN parameters were allowed, I don't even think it could be
> allowable to call them from the SQL level, you could only from another
> function.
>
> For instance, what would it mean if you did something like:
>
> SELECT foo(a) FROM mytable;
>
> Where foo() mutated it's IN argument? Would that really be an UPDATE?
>
>
>   

No, surely the mutated value will only be visible within the scope of 
the function, i.e. it will be a purely local copy that gets altered.

cheers

andrew


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