why db block gets = 0?

9.2.0.5 version

when I connect as hr and turn trace on:   select * from regions;

output:

......

Execution Plan

   0 SELECT STATEMENT Optimizer=CHOOSE (Cost=2 Card=4 Bytes=56)    1 0 TABLE ACCESS (FULL) OF 'REGIONS' (Cost=2 Card=4 Bytes=56)

Statistics

          0  recursive calls
          0  db block gets
          4  consistent gets
          0  physical reads
          0  redo size
        534  bytes sent via SQL*Net to client
        499  bytes received via SQL*Net from client
          2  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          4  rows processed

If it's first time I can see physical reads not equal to 0.

My confusion is:
1) I never update regions tables, why there is consistents gets? 2) why db block gets is 0 ? it should have some value because

   I'm reading blocks in current mode.

Thanks for clarification! Received on Fri Oct 08 2004 - 15:02:47 CDT