On Jul 11, 2010, at 10:32 PM, Itagaki Takahiro <itagaki.takahiro@gmail.com> wrote:
> 2010/7/12 Robert Haas <robertmhaas@gmail.com>:
>> I'm all in favor of putting such things in core as are supported by
>> multiple competing products, but is that really true for all of these?
>
> - concat() : MySQL, Oracle, DB2
> - concat_ws() : MySQL,
> - left(), right() : MySQL, SQL Server, DB2
> - reverse() : MySQL, SQL Server, Oracle (as utl_raw.reverse)
>
> concat_sql(), format(), and sprintf() will be our unique features.
I think concat, left, right, and reverse should go into core, and perhaps format also. The rest sound like contrib
materialto me.
...Robert