CREATE_SCHEMA(7)

1CREATE SCHEMA(7)         PostgreSQL 11.6 Documentation        CREATE SCHEMA(7)
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NAME

6       CREATE_SCHEMA - define a new schema
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SYNOPSIS

9       CREATE SCHEMA schema_name [ AUTHORIZATION role_specification ] [ schema_element [ ... ] ]
10       CREATE SCHEMA AUTHORIZATION role_specification [ schema_element [ ... ] ]
11       CREATE SCHEMA IF NOT EXISTS schema_name [ AUTHORIZATION role_specification ]
12       CREATE SCHEMA IF NOT EXISTS AUTHORIZATION role_specification
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14       where role_specification can be:
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16           user_name
17         | CURRENT_USER
18         | SESSION_USER
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DESCRIPTION

21       CREATE SCHEMA enters a new schema into the current database. The schema
22       name must be distinct from the name of any existing schema in the
23       current database.
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25       A schema is essentially a namespace: it contains named objects (tables,
26       data types, functions, and operators) whose names can duplicate those
27       of other objects existing in other schemas. Named objects are accessed
28       either by “qualifying” their names with the schema name as a prefix, or
29       by setting a search path that includes the desired schema(s). A CREATE
30       command specifying an unqualified object name creates the object in the
31       current schema (the one at the front of the search path, which can be
32       determined with the function current_schema).
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34       Optionally, CREATE SCHEMA can include subcommands to create objects
35       within the new schema. The subcommands are treated essentially the same
36       as separate commands issued after creating the schema, except that if
37       the AUTHORIZATION clause is used, all the created objects will be owned
38       by that user.
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PARAMETERS

41       schema_name
42           The name of a schema to be created. If this is omitted, the
43           user_name is used as the schema name. The name cannot begin with
44           pg_, as such names are reserved for system schemas.
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46       user_name
47           The role name of the user who will own the new schema. If omitted,
48           defaults to the user executing the command. To create a schema
49           owned by another role, you must be a direct or indirect member of
50           that role, or be a superuser.
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52       schema_element
53           An SQL statement defining an object to be created within the
54           schema. Currently, only CREATE TABLE, CREATE VIEW, CREATE INDEX,
55           CREATE SEQUENCE, CREATE TRIGGER and GRANT are accepted as clauses
56           within CREATE SCHEMA. Other kinds of objects may be created in
57           separate commands after the schema is created.
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59       IF NOT EXISTS
60           Do nothing (except issuing a notice) if a schema with the same name
61           already exists.  schema_element subcommands cannot be included when
62           this option is used.
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NOTES

65       To create a schema, the invoking user must have the CREATE privilege
66       for the current database. (Of course, superusers bypass this check.)
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EXAMPLES

69       Create a schema:
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71           CREATE SCHEMA myschema;
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73       Create a schema for user joe; the schema will also be named joe:
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75           CREATE SCHEMA AUTHORIZATION joe;
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77       Create a schema named test that will be owned by user joe, unless there
78       already is a schema named test. (It does not matter whether joe owns
79       the pre-existing schema.)
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81           CREATE SCHEMA IF NOT EXISTS test AUTHORIZATION joe;
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83       Create a schema and create a table and view within it:
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85           CREATE SCHEMA hollywood
86               CREATE TABLE films (title text, release date, awards text[])
87               CREATE VIEW winners AS
88                   SELECT title, release FROM films WHERE awards IS NOT NULL;
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90       Notice that the individual subcommands do not end with semicolons.
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92       The following is an equivalent way of accomplishing the same result:
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94           CREATE SCHEMA hollywood;
95           CREATE TABLE hollywood.films (title text, release date, awards text[]);
96           CREATE VIEW hollywood.winners AS
97               SELECT title, release FROM hollywood.films WHERE awards IS NOT NULL;
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COMPATIBILITY

100       The SQL standard allows a DEFAULT CHARACTER SET clause in CREATE
101       SCHEMA, as well as more subcommand types than are presently accepted by
102       PostgreSQL.
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104       The SQL standard specifies that the subcommands in CREATE SCHEMA can
105       appear in any order. The present PostgreSQL implementation does not
106       handle all cases of forward references in subcommands; it might
107       sometimes be necessary to reorder the subcommands in order to avoid
108       forward references.
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110       According to the SQL standard, the owner of a schema always owns all
111       objects within it.  PostgreSQL allows schemas to contain objects owned
112       by users other than the schema owner. This can happen only if the
113       schema owner grants the CREATE privilege on their schema to someone
114       else, or a superuser chooses to create objects in it.
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116       The IF NOT EXISTS option is a PostgreSQL extension.
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