I have not been able to work out how to do this is Postgres 8
(pseudo-code)

 if exists table foo
   drop table foo;
 end
 create table foo;

If I go with

  drop table foo;
  create table foo;

then it barfs on an empty db.


The assumption here is that the SQL is coming in on a script via the
programmatic interface.  Slurp in a bunch of SQL commands and then fire
them at the database.



There are a couple of commands that may help you:

\set ON_ERROR_STOP
\unset ON_ERROR_STOP

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