Welcome to psql  8 . 1 . 3 , the PostgreSQL interactive terminal.

Type:  \copyright for distribution terms
       \h for help with SQL commands
       \? for help with psql commands
       \g or terminate with semicolon to execute query
       \q to quit

atslog=#  select count(duration) from c2  where timeofcall  >='2006-11-1' and timeofcall<'2006-11-30';
 count  
--------
  437228 
( 1  row)

atslog=#  select count(duration) from c1  where timeofcall  >='2006-11-1' and timeofcall<'2006-11-30';
 count  
--------
  437228 
( 1  row)

atslog=#  select count(duration) from c1;                                                             
  count  
---------
  2985488 
( 1  row)

atslog=#  select count(duration) from c2;
  count  
---------
  2985488 
( 1  row)

atslog=# 

--------------------------------------а вот лог------------------
tail -f $PGDATA/serverlog 
LOG:  checkpoint record is at  0 /74D34418
LOG:  redo record is at  0 /74D34418; undo record is at  0 / 0 ; shutdown TRUE
LOG:  next transaction ID:  1544818 ; next OID:  273907 
LOG:  next MultiXactId:  1 ; next MultiXactOffset:  0 
LOG:  database system is ready
LOG:  transaction ID wrap limit is  1075277484 , limited by database "tst1"
LOG:  statement: select count(duration) from c2  where timeofcall  >='2006-11-1' and timeofcall<'2006-11-30';
LOG:  duration:  5499 . 181  ms
LOG:  statement: select count(duration) from c1  where timeofcall  >='2006-11-1' and timeofcall<'2006-11-30';
LOG:  duration:  3347 . 500  ms
LOG:  statement: select count(duration) from c1;
LOG:  duration:  6358 . 656  ms
LOG:  statement: select count(duration) from c2;
LOG:  duration:  1854 . 537  ms
-----------------------------------чуть  не забыл структуру таблиц-----------------------
atslog=# \d c2
                  Table "public.c2"
   Column   |            Type             | Modifiers 
------------+-----------------------------+-----------
 timeofcall | timestamp without time zone | 
 forwarded  | character( 3 )                | 
 internally | smallint                    | 
 co         | smallint                    | 
 way        | character( 3 )                | 
 number     | numeric( 100 , 0 )              | 
 duration   | integer                     | 
 cost       | numeric( 100 , 3 )              | 
--------------------------------------------------------------------------------------------
atslog=# \d c1
                  Table "public.c1"
   Column   |            Type             | Modifiers 
------------+-----------------------------+-----------
 timeofcall | timestamp without time zone | 
 forwarded  | character( 3 )                | 
 internally | smallint                    | 
 co         | smallint                    | 
 way        | character( 3 )                | 
 number     | numeric( 100 , 0 )              | 
 duration   | integer                     | 
 cost       | numeric( 100 , 3 )              | 
Rules:
    c1_yy06mm07_ins AS
    ON INSERT TO c1
   WHERE new.timeofcall >= '2006-07-01'::date AND new.timeofcall < '2006-08-01'::date DO INSTEAD  INS
_yy06mm07 (timeofcall, forwarded, internally, co, way, number, duration, cost) 
  VALUES (new.timeofcall, new.forwarded, new.internally, new.co, new.way, new.number, new.duration, n
    c1_yy06mm08_ins AS
    ON INSERT TO c1
   WHERE new.timeofcall >= '2006-08-01'::date AND new.timeofcall < '2006-09-01'::date DO INSTEAD  INS
_yy06mm08 (timeofcall, forwarded, internally, co, way, number, duration, cost) 
  VALUES (new.timeofcall, new.forwarded, new.internally, new.co, new.way, new.number, new.duration, n
    c1_yy06mm09_ins AS
    ON INSERT TO c1
   WHERE new.timeofcall >= '2006-09-01'::date AND new.timeofcall < '2006-10-01'::date DO INSTEAD  INS
_yy06mm09 (timeofcall, forwarded, internally, co, way, number, duration, cost) 
  VALUES (new.timeofcall, new.forwarded, new.internally, new.co, new.way, new.number, new.duration, n
    c1_yy06mm10_ins AS
......