strange explain

Hi,


I've got performance problem and while I'dont ready to describe it
I'd like to ask about strange explain:

tour=# explain analyze  select * from tours  where            ( operator_id in (2,3,4,5,7) and type_id = 2 )  or
   ( operator_id = 8 and type_id=4 );
 

NOTICE:  QUERY PLAN:

Index Scan using type_idx, type_idx, type_idx, type_idx, type_idx, type_idx on tours  (cost=0.00..12.25 rows=1
width=1091)(actual time=0.26..0.26 rows=0 loops=1)
 
Total runtime: 0.45 msec

EXPLAIN

What does many 'type_idx' means ?

Theare are 2 indices - operator_idx and type_idx.

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