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Historical version. PostgreSQL 7.2 reached end of support in February 2007. See the current manual for supported releases.

PostgreSQL 7.2.8 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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