create_schema(7)

1CREATE SCHEMA(7)                 SQL Commands                 CREATE SCHEMA(7)
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NAME

6       CREATE SCHEMA - define a new schema
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SYNOPSIS

10       CREATE SCHEMA schemaname [ AUTHORIZATION username ] [ schema_element [ ... ] ]
11       CREATE SCHEMA AUTHORIZATION username [ schema_element [ ... ] ]
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DESCRIPTION

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

35       schemaname
36              The name of a schema to be created. If this is omitted, the user
37              name is used as the schema name. The name cannot begin with pg_,
38              as such names are reserved for system schemas.
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40       username
41              The name of the user  who  will  own  the  schema.  If  omitted,
42              defaults  to the user executing the command. Only superusers can
43              create schemas owned by users other than themselves.
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45       schema_element
46              An SQL statement defining an object to  be  created  within  the
47              schema. Currently, only CREATE TABLE, CREATE VIEW, CREATE INDEX,
48              CREATE SEQUENCE,  CREATE  TRIGGER  and  GRANT  are  accepted  as
49              clauses within CREATE SCHEMA. Other kinds of objects may be cre‐
50              ated in separate commands after the schema is created.
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NOTES

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

57       Create a schema:
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59       CREATE SCHEMA myschema;
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62       Create a schema for user joe; the schema will also be named joe:
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64       CREATE SCHEMA AUTHORIZATION joe;
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67       Create a schema and create a table and view within it:
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69       CREATE SCHEMA hollywood
70           CREATE TABLE films (title text, release date, awards text[])
71           CREATE VIEW winners AS
72               SELECT title, release FROM films WHERE awards IS NOT NULL;
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74       Notice that the individual subcommands do not end with semicolons.
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76       The following is an equivalent way of accomplishing the same result:
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78       CREATE SCHEMA hollywood;
79       CREATE TABLE hollywood.films (title text, release date, awards text[]);
80       CREATE VIEW hollywood.winners AS
81           SELECT title, release FROM hollywood.films WHERE awards IS NOT NULL;
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COMPATIBILITY

85       The  SQL  standard  allows  a  DEFAULT  CHARACTER  SET clause in CREATE
86       SCHEMA, as well as more subcommand types than are presently accepted by
87       PostgreSQL.
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89       The  SQL  standard  specifies that the subcommands in CREATE SCHEMA can
90       appear in any order. The present  PostgreSQL  implementation  does  not
91       handle  all  cases of forward references in subcommands; it might some‐
92       times be necessary to reorder the subcommands in order to avoid forward
93       references.
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95       According  to  the  SQL standard, the owner of a schema always owns all
96       objects within it. PostgreSQL allows schemas to contain  objects  owned
97       by  users  other  than  the  schema  owner. This can happen only if the
98       schema owner grants the CREATE privilege on his schema to someone else.
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