I thought as much.
Thanx for the reply,
Garth
Merlin Moncure wrote:
> On 1/19/07, Garth Keesler <garthk@gdcjk.com> wrote:
>> I have a primary key made up of two varchar(128) columns, typically less
>> than 16 chars each. Concatenating the two columns would still be unique.
>> Would it make sense to concat the two columns, using a unique separator
>> like '~' and index on that single column or would that be more trouble
>> than the potential performance gains?
>
> yes. use a multiple key index. that is what they are for. or let the
> db do it for you:
>
> create table foo (a text, b text, primary key(a,b));
>
> merlin
>
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