Re: like/ilike improvements

Tom Lane wrote:
>
> 3. UTF8: % can advance bytewise.  _ must check it is on a first byte
> (else return match failure) and if so do NextChar.  So primitives
> are NextChar, NextByte, ByteEq, IsFirstByte.
>
>
>   

We should only be able to get out of step from the "%_" case, I believe, 
so we should only need to do the first-byte test in that case (which is 
in a different code path from the normal "_" case. Does that seem right?

cheers

andrew