The pg_database catalog stores information about the available databases. The pg_database table is shared between all databases of a cluster. Databases are created with the CREATE DATABASE. Consult the Administrator's Guide for details about the meaning of some of the parameters.
Table 3-6. pg_database Columns
| Name | Type | References | Description |
|---|---|---|---|
| datname | name | Database name | |
| datdba | int4 | pg_shadow.usesysid | Owner of the database, initially who created it |
| encoding | int4 | Character/multibyte encoding for this database | |
| datistemplate | bool | If true then this database can be used in the "TEMPLATE" clause of CREATE DATABASE to create the new database as a clone of this one. | |
| datallowconn | bool | If false then no one can connect to this database. This is used to protect the template0 database from being altered. | |
| datlastsysoid | oid | Last oid in existence after the database was created; useful particularly to pg_dump | |
| datpath | text | If the database is stored at an alternative location then this records the location. It's either an environment variable name or an absolute path, depending how it was entered. |