Tom Lane wrote:
> AFAICS, getting SIMILAR TO to operate per spec would require adding some
> sort of translation function that converts the spec-style pattern into
> a Posix pattern that our regex match engine would handle. This would at
> least require adding ^ and $ around the pattern, converting the escape
> character if any, and translating % and _ into .* and . respectively.
> There are probably some differences of detail that we'd need to fix
> later, but that would get it to a state where we need not be ashamed
> to release it.
>
> We already have a similar mechanism for handling LIKE ... ESCAPE
> clauses, so it doesn't seem too difficult to do. But I haven't got
> time for it...
It seems like a merge of regex and LIKE patterns. ANSI doesn't have
regex so maybe SIMILAR TO is their solution to that.
-- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610)
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