07.05.2018 13:57, Gabor Boros mlnglsts@... [firebird-support] wrote:

> So I see what you say. But result of
>
> SELECT CAST(''='' AS CHAR(5)) SIMILAR TO '[A-Z]{2}[0-9A-Z]{2,13}' FROM
> RDB$DATABASE;
>
> is
>
> =======
> <false>

Perhaps, it must be CHAR(4) or VARCHAR. I'm not sure in type of implicit cast result.


--
WBR, SD.