at is we complete execution of earlier
      statements before running parse analysis and planning on the
      following ones.  This eliminates a long-standing issue, in that DDL
      that should affect the behavior of a later statement will now behave as
      expected.
     </P
></LI
><LI
><P
>      Restore pre-9.2 cost estimates for index usage (Tom Lane)
     </P
><P
>      An ill-considered change of a fudge factor led to undesirably high
      cost estimates for use of very large indexes.
     </P
>