Closest you'll come is using copy...
psql -c "create temp table ...; copy from temp_table to file"
There has been some discussion about allowing COPY to work from either a
view or an arbitrary SELECT statement; check the -hackers archives.
On Thu, Nov 24, 2005 at 06:21:30PM +1100, Klint Gore wrote:
> Is there any way to get pg_dump to run a statement before dumping?
>
> I'd like to do something like
>
> pg_dump -a -c "create temp table params as select * from params where
> key=blah;" -d dev_db -t params -f /svn/db/params.blah
> svn commit /svn/db/params.blah
>
> I'd rather avoid doing
> psql -c "create table params_svn as select * from params where key = blah;"
> pg_dump .
> psql -c "drop table params_svn"
> replace tmptablename realtablename
> svn commit ...
>
> klint.
>
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