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Note: The following description applies both to Postgres-XC and PostgreSQL if not described explicitly. You can read PostgreSQL as Postgres-XC except for version number, which is specific to each product.
The catalog pg_default_acl stores initial privileges to be assigned to newly created objects.
Table 47-18. pg_default_acl Columns
| Name | Type | References | Description |
|---|---|---|---|
| oid | oid | Row identifier (hidden attribute; must be explicitly selected) | |
| defaclrole | oid | pg_authid.oid | The OID of the role associated with this entry |
| defaclnamespace | oid | pg_namespace.oid | The OID of the namespace associated with this entry, or 0 if none |
| defaclobjtype | char | Type of object this entry is for: r = relation (table, view), S = sequence, f = function, T = type | |
| defaclacl | aclitem[] | Access privileges that this type of object should have on creation |
A pg_default_acl entry shows the initial privileges to be assigned to an object belonging to the indicated user. There are currently two types of entry: "global" entries with defaclnamespace = 0, and "per-schema" entries that reference a particular schema. If a global entry is present then it overrides the normal hard-wired default privileges for the object type. A per-schema entry, if present, represents privileges to be added to the global or hard-wired default privileges.
Note that when an ACL entry in another catalog is null, it is taken to represent the hard-wired default privileges for its object, not whatever might be in pg_default_acl at the moment. pg_default_acl is only consulted during object creation.