Benjamin Arai <me@xxxxxxxxxxxxxxxx> writes:
> We are thinking of modifying our system to use COPY to replace these
> large INSERT transactions but we are concerned that it will greatly
> impact the user experience (i.e., exclusively lock the table during the
> copy process). First, does COPY grab an exclusive lock? Second, is
> there a better way to load data?
No, and no. Use COPY.
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
