This metadata table contains system pgpro_metastore information, and it is not intended to be updated by users.

The uri column contains initial serialized URIs associated with uri or tmp_uri values of the pga_storage metadata table.

The path column contains paths to root directories of storages. This is the only relevant column for local storages, and its values usually match uri values, except for prefixes specifying the storage type:

Remaining columns contain arbitrary URIs for S3 storages.

For more information, refer to RFS 3968 and to the official AWS documentation.