Re: ALTER TABLE ... ALTER COLUMN ... SET DISTINCT

On Tue, May 5, 2009 at 12:13 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>> On Mon, May 4, 2009 at 10:41 PM, Joshua Tolley <eggyknap(at)gmail(dot)com> wrote:
>>> A question: why does attdistinct become entry #5 instead of going at the end?
>>> I assume it's because the order here controls the column order, and it makes
>>> sense to have attdistinct next to attstattarget, since they're related. Is
>>> that right? Thanks in advance...
>
>> Yep, that was my thought.
>
> We generally want fixed-size columns before variable-size ones, to ease
> accessing them from C code.  So it shouldn't go at the end in any case.
> Beyond that it's mostly aesthetics, with maybe some thought for avoiding
> unnecessary alignment padding.

I thought about that as well; it should be OK where it is, in that regard.

...Robert