< UNDER CONSTRUCTION >
CockroachDB includes a set of system catalogs that provide non-stored data to client applications. System catalogs are available as schemas preloaded to every database and a full list of tables and their descriptions in each system catalog is provided in the following links:
information_schema: a schema provided for compatibility with the SQL standard.
crdb_internal: a schema with information about CockroachDB internals.
pg_catalog: a schema provided for compatibility with PostgreSQL.
pg_extension: a schema catalog with information about CockroachDB extensions.