This catalog defines groups and stores what users belong to what groups. Groups are created with the CREATE GROUP command. See Chapter 5 for information about user permission management.
Because user and group identities are cluster-wide, pg_group is shared across all databases of a cluster: there is only one copy of pg_group per cluster, not one per database.
Table 20-8. pg_group Columns
| Name | Type | References | Description |
|---|---|---|---|
| groname | name | Name of the group | |
| grosysid | int4 | An arbitrary number to identify this group | |
| grolist | int4[] | pg_shadow.usesysid | An array containing the ids of the users in this group |