postgres schema exporter
go get -u github.com/mguzelevich/pex/cmd/...
go build github.com/mguzelevich/pex/cmd/...
$ echo "dbname=<DBNAME> sslmode=disable" | ./pex
$ echo "dbname=<DBNAME> user=<USER> password=<PASSWD> host=<HOST> sslmode=disable" | ./pex
$ echo "dbname=<DBNAME> sslmode=disable" | ./pex -f dot | dot -Tpng > /tmp/databases.png && pqiv /tmp/databases.png