par_empty $MYSQL	p_wrapper par_empty \$MYSQL
par_empty $MYSQL	/bin/bash: p_wrapper: command not found
par_empty $PG	p_wrapper par_empty \$PG
par_empty $PG	/bin/bash: p_wrapper: command not found
par_empty $SQLITE	p_wrapper par_empty \$SQLITE
par_empty $SQLITE	/bin/bash: p_wrapper: command not found