We estimate 1 month for both us to complete these issues/todos and
1 month extra to write documentation, so we certainly are not ready
for 8.2, most probable 8.3. We're looking for sponsorship of our work.
Oleg
On Sat, 15 Jul 2006, Teodor Sigaev wrote:
tsearch2 is functionality that definitely should be in core eventually,
but even Oleg still says it's not done. Aside from the documentation
issue, it's not clear that we've got a stable API for it.
Issues/TODO to move tsearch2 into core (by fast look)
* memory management. Dictionaries and tsearch2 itself cache a lot
of data in memory allocated by malloc/palloc(TopContext) and
not all can be correctly freed by reset_tsearch() function.
* tsearch2 doesn't automatically reinit dictionary/configuration
after configuration changes
* Also, dictionary doesn't automatically recompile its files if they
were changed
* It will be good to store shared information (such as
dictionary's structure) in shared memory. For example,
ispell dict takes for compile its files about 1-5 seconds, sharing
should help
* I suppose, at least snowball stemmers should be compiled in
postgresql or compiled them into separate *.so libs. Sources
of all snowball's files take ~1Mb on disk. The goal is easier
configuration for end-user. Ispell dict's files take 1-3 Mb per
language.
* Now database can be created with another encoding then cluster was
initialized, but locale can't be changed. Tsearch2 depends on locale
because of lower/upper casing and isalpha(and somr another is*). So,
it's possible to get unworking tsearch2 configuration.
I'm going to vacation tomorrow for two week, so I havn't time to resolve that
issues before feature freeze, sorry.
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Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83
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