Partial revert for debug output
Partial revert for debug output

This is a partial revert of 2531c55cb471b972357d3b541e641167f026b533
that broke at least PostgreSQL driver. It seems that trying to read the
stdout of one of the command was not a good idea.

sileht/pifpaf,jd/pifpaf,jd/pifpaf,sileht/pifpaf,sileht/pifpaf