PostgreSQL 7.2.1 Documentation
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# 3.8. pg_group

This catalog defines groups and stores what users belong to what groups. Groups are created with the CREATE GROUP command. Consult the Administrator's Guide 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 3-8. 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

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