Postgres Pro
Downloads
Home   >   mailing lists

pgsql: Tweak choose_bitmap_and() heuristics in the light of example - Mailing list pgsql-committers

From [email protected] (Tom Lane)
Subject pgsql: Tweak choose_bitmap_and() heuristics in the light of example
Date
Msg-id [email protected]
Whole thread Raw
List pgsql-committers
Tree view 
Log Message:
-----------
Tweak choose_bitmap_and() heuristics in the light of example provided in bug
#2075: consider an index redundant if any of its index conditions were already
used, rather than if all of them were.  Also, make the selectivity comparison
a bit fuzzy, so that very small differences in estimated selectivities don't
skew the results.

Modified Files:
--------------
    pgsql/src/backend/optimizer/path:
        indxpath.c (r1.194 -> r1.195)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/indxpath.c.diff?r1=1.194&r2=1.195)

pgsql-committers by date:

Previous
From: [email protected] (Tom Lane)
Date:
Subject: pgsql: Tweak choose_bitmap_and() heuristics in the light of example
Next
From: [email protected] (Tom Lane)
Date:
Subject: pgsql: Rearrange code in pg_atoi() to avoid assuming that isspace()