54.36. pg_parameter_acl #
 The catalog pg_parameter_acl records configuration parameters for which privileges have been granted to one or more roles. No entry is made for parameters that have default privileges. 
 Unlike most system catalogs, pg_parameter_acl is shared across all databases of a cluster: there is only one copy of pg_parameter_acl per cluster, not one per database. 
Table 54.36. pg_parameter_acl Columns
Column Type Description  | 
|---|
 Row identifier  | 
 The name of a configuration parameter for which privileges are granted  | 
 Access privileges; see Section 5.8 for details  |