Re: Column storage positions

Martijn van Oosterhout wrote:
> On Wed, Feb 21, 2007 at 03:59:12PM +0100, Florian G. Pflug wrote:
>> I think you'd want to have a flag per field that tell you if the user
>> has overridden the storage pos for that specific field. Otherwise,
>> the next time you have to chance to optimize the ordering, you might
>> throw away changes that the admin has done on purpose. 
> 
> Why would you want to let the admin have any say at all about the
> storage order?

It wasn't my idea - the OP proposed a "alter table <table> alter column 
<col> set storage position <pos>" command. But if you're gonna decouple
the storage order from the attnum, they why don't let the dba tweak it?

Since you have at least two possible optimization speeds - for size, or
for fast access to specifc fields, creating a one-size-fits-all ordering
rule seems hard...

greetings, Florian Pflug