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.
The name of a configuration parameter for which privileges are granted
Access privileges; see Section 5.7 for details
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