Check if $PGDATA/cstore_fdw/<oid> folder exists

Hello,

I want to have cstore_fdw to part of all the databases I create, so I installed this to template1 database.

When creating a new database it doesn't create a folder under cstore_fdw, and I receive an error:
`ERROR: could not open file "/data1/pgsql/data/cstore_fdw/2813186/2813202" for writing: No such file or directory`

To fix this I created a folder with the oid name of my database, and this fixed the problem.

Can we enhance the fdw to check this?

Also what would be the command I have to execute to create that folder from the database (i.e. using SQL)

Regards,
Balazs