1.5.8.Can I drop and re-create the DefaultQuadStorage?
Currently system metadata consist of three "levels":
-
QuadMapFormats
are used to describe transformations of individual SQL values (or types of SQL values),
-
QuadMaps
refers to
QuadMapFormats
(via
QuadMapValues
) and describe some "minimal" independent RDB2RDF transformations,
-
QuadStorages
organizes
QuadMaps
.
QuadStorages
contains
only "symlinks" to maps, if you drop a storage you don't drop all
mappings inside. If you drop the DefaultQuadStorage or some other
built-in thing, it can be safely recovered by DB.DBA.RDF_AUDIT_METADATA
, with first
parameter set to 1. This will keep your own data intact. However we
recommend to write a script that declares all your formats, Linked
Data Views and storages, to be able to reproduce the configuration
after any failures.