Andrew Dunstan <[EMAIL PROTECTED]> writes:
> And is it to be unique per machine, or per cluster (since you can have
> many postgresql clusters on one machine).
Actually, there are *lots* of ambiguities there. For instance, if you
pg_dump and reload a cluster do you want the ID to change or stay the
same? How about copying the $PGDATA tree to another server? How about
redirecting the same cluster to listen on a new port number?
regards, tom lane
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
