I create a small (4 lines) patch for databases/postgres.py
def _append_from(self, text, stmt):
return text.replace(' WHERE', ' FROM ' + string.join([table.name
for table in stmt.kwargs['postgres_from']], ', ') + ' WHERE')
def visit_update(self, update_stmt):
text = super(PGCompiler, self).visit_update(update_stmt)
if 'postgres_returning' in update_stmt.kwargs:
text = self._append_returning(text, update_stmt)
if 'postgres_from' in update_stmt.kwargs:
text = self._append_from(text, update_stmt)
return text
But I think that text.replace(...) is ugly, may be you know how to
insert FROM clause before WHERE without replacements?
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