Обсуждение: pgsql: Remove QueryOperand->istrue flag, it was used only in cover

Log Message:
-----------
Remove QueryOperand->istrue flag, it was used only in cover ranking
(ts_rank_cd). Use palloc'ed array in ranking instead of flag.

Modified Files:
--------------
    pgsql/src/backend/utils/adt:
        tsquery.c (r1.6 -> r1.7)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsquery.c?r1=1.6&r2=1.7)
        tsrank.c (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsrank.c?r1=1.5&r2=1.6)
    pgsql/src/include/tsearch:
        ts_type.h (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/tsearch/ts_type.h?r1=1.5&r2=1.6)

Teodor Sigaev wrote:
> Remove QueryOperand->istrue flag, it was used only in cover ranking
> (ts_rank_cd). Use palloc'ed array in ranking instead of flag.

Nice, I played around that myself as well today. I tried to use
Bitmapsets, instead of bool arrays, but that turned out to be
significantly slower than the way it used to be. It looks like that
bool-array method isn't, so that's good.

Increasing the length field in QueryOperand doesn't actually help,
because TSVector still only uses 11-bits for the length. And there's
checks in tsquery.c that forbid values longer than MAXSTRLEN=2^11-1 anyway.

--
  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com

> Nice, I played around that myself as well today. I tried to use
> Bitmapsets, instead of bool arrays, but that turned out to be
> significantly slower than the way it used to be. It looks like that
> bool-array method isn't, so that's good.
Yeah, hope so.
>
> Increasing the length field in QueryOperand doesn't actually help,
> because TSVector still only uses 11-bits for the length. And there's
> checks in tsquery.c that forbid values longer than MAXSTRLEN=2^11-1 anyway.
I know, but I doubt that rename istrue field to unused is much better.


--
Teodor Sigaev                                   E-mail: teodor@sigaev.ru
                                                    WWW: http://www.sigaev.ru/