On Wed, Sep 13, 2017 at 12:12 AM, Michael Paquier <michael.paqu...@gmail.com > wrote: > > Foreign tables do not have physical storage assigned to by default. At > least heap_create() tells so, create_storage being set to false for a > foreign table. So there is nothing to clean up normally. Or is > cstore_fdw using directly heap_create with its own relfilenode set, > creating a physical storage? >
cstore_fdw (in store_data_in_internal_storage branch) calls RelationCreateStorage() after CREATE FOREIGN TABLE completes [1]. Later it also creates the FSM fork and uses it for storing some metadata. [1] https://github.com/citusdata/cstore_fdw/blob/store_data_in_internal_storage/cstore_fdw.c#L237
