RFC - change of behaviour of pg_get_userbyid & pg_get_viewdef?

Two routines do eccentric things when they can't find required supporting
data:

pg_get_userbyid

    returns 'unknown (UID=<uid-number>)' when the UID does not exist.

pg_get_viewdef

    returns 'Not a view' when passed a non-existant or non-view table
    it also signals errors when the underlying metadata can not be found.

The proposal is to return NULL in the above cases - in the final case,
probably also generate a NOTICE.

Does anybody have a problem with this? Think it's a bad idea etc?



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