Re: pg_index.indislossy - Mailing list pgsql-hackers

From Oleg Bartunov
Subject Re: pg_index.indislossy
Date
Msg-id Pine.GSO.4.33.0105151158510.15894-100000@ra.sai.msu.su
Whole thread Raw
In response to pg_index.indislossy  (Bruce Momjian <pgman@candle.pha.pa.us>)
Responses Re: pg_index.indislossy
List pgsql-hackers
GiST certainly use it ! Please don't remove.
GiST uses compression/decompression technique which could
produce false drops.
Oleg
On Mon, 14 May 2001, Bruce Momjian wrote:

> Can someone tell me what we use indislossy for?  The only comment I
> could find was:
>
>     /*
>      * WITH clause reinstated to handle lossy indices. -- JMH, 7/22/96
>      */
>     foreach(pl, parameterList)
>     {
>         DefElem    *param = (DefElem *) lfirst(pl);
>
>         if (!strcasecmp(param->defname, "islossy"))
>             lossy = true;
>         else
>             elog(NOTICE, "Unrecognized index attribute \"%s\" ignored",
>                  param->defname);
>     }
>
> and
>
>     bool        indislossy;     /* do we fetch false tuples (lossy
>                                  * compression)? */
>
> Should I remove this column?
>
>
>
Regards,    Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83



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