pg_namespace
   The catalog pg_namespace stores namespaces.
   A namespace is the structure underlying SQL schemas: each namespace
   can have a separate collection of relations, types, etc. without name
   conflicts.
  
Table 48.38. pg_namespace Columns
Column Type Description  | 
|---|
        Row identifier  | 
        Name of the namespace  | 
        Owner of the namespace  | 
        Access privileges; see Section 5.7 for details  |