dumping data to version control using pg_dump?

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.

+---------------------------------------+-----------------+
: Klint Gore : "Non rhyming :
: EMail : kg(at)kgb(dot)une(dot)edu(dot)au : slang - the :
: Snail : A.B.R.I. : possibilities :
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: Armidale NSW 2351 Australia : L.J.J. :
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