Re: gsoc, oprrest function for text search take 2

Alvaro Herrera wrote:
> Jan Urbański wrote:
>> Heikki Linnakangas wrote:
>
>>> Sounds like a plan. In (2), it's even better to detoast the values
>>> lazily. For a typical one-word tsquery, the binary search will only
>>> look at a small portion of the elements.
>> Hm, how can I do that? Toast is still a bit black magic to me... Do you
>> mean I should stick to having Datums in TextFreq?
>
> Store both the Datum and the text *. If the latter is NULL, then grab
> the datum, detoast and store the result in the text *. Next time you
> need to look at it, it's already detoasted.

Yeah, I got that idea, but then I thought the chances of touching the
same element during binary search twice were very small. Especially now
when the detoasting occurs only when we hit a text Datum that has the
same length as the sought lexeme.
Still, I can do it if people feel like it.

Cheers,
Jan

--
Jan Urbanski
GPG key ID: E583D7D2

ouden estin