omego/db.py is sensitive to .psqlrc settings about omego HOT 1 OPEN

Looks like the behaviour depends on your PG version:

https://www.postgresql.org/docs/9.4/static/app-psql.html

-c command
--command=command

Specifies that psql is to execute one command string, command, and then exit. This is useful in shell scripts. Start-up files (psqlrc and ~/.psqlrc) are ignored with this option.

https://www.postgresql.org/docs/9.6/static/app-psql.html

-c command
--command=command

Specifies that psql is to execute the given command string, command. This option can be repeated and combined in any order with the -f option. When either -c or -f is specified, psql does not read commands from standard input; instead it terminates after processing all the -c and -f options in sequence.

The docs suggest -X

from omego.