Re: Re: Changing the default value of an inherited column

Peter Eisentraut wrote: >Tom Lane writes: > >> It seems that in pre-7.0 Postgres, this works: >> >> create table one(id int default 1, descr text); >> create table two(id int default 2, tag text) inherits (one); >> >> with the net effect that table "two" has just one "id" column with >> default value 2. > >Although the liberty to do anything you want seems appealing at first, I >would think that allowing this is not correct from an OO point of view.

I don't agree; this is equivalent to redefinition of a feature (=method) in
a descendant class, which is perfectly acceptable so long as the feature's
signature (equivalent to column type) remains unchanged.

-- 
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver
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