"
><A
NAME="AEN114250"
>E.2.3.1.1. Locking</A
></H4
><P
></P
><UL
><LI
><P
>        Prevent non-key-field row updates from blocking foreign key checks
        (&Aacute;lvaro Herrera, Noah Misch, Andres Freund, Alexander
        Shulgin, Marti Raudsepp, Alexander Shulgin)
       </P
><P
>        This change improves concurrency and reduces the probability of
        deadlocks when updating tables involved in a foreign-key constraint.
        <TT
CLASS="COMMAND"
>UPDATE</TT
>s that do not change any columns r