Use RelationGetNumberOfAttributes to get number of columns in CStoreGetForeignPaths.
Use RelationGetNumberOfAttributes to get number of columns in CStoreGetForeignPaths.

olivermel/cstore_fdw,cpcloud/cstore_fdw,cpcloud/cstore_fdw,olivermel/cstore_fdw,citusdata/cstore_fdw,olivermel/cstore_fdw,citusdata/cstore_fdw