Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

create_conversion(7) [centos man page]

CREATE 
CONVERSION(7) PostgreSQL 9.2.7 Documentation CREATE CONVERSION(7) NAME
CREATE_CONVERSION - define a new encoding conversion SYNOPSIS
CREATE [ DEFAULT ] CONVERSION name FOR source_encoding TO dest_encoding FROM function_name DESCRIPTION
CREATE CONVERSION defines a new conversion between character set encodings. Also, conversions that are marked DEFAULT can be used for automatic encoding conversion between client and server. For this purpose, two conversions, from encoding A to B and from encoding B to A, must be defined. To be able to create a conversion, you must have EXECUTE privilege on the function and CREATE privilege on the destination schema. PARAMETERS
DEFAULT The DEFAULT clause indicates that this conversion is the default for this particular source to destination encoding. There should be only one default encoding in a schema for the encoding pair. name The name of the conversion. The conversion name can be schema-qualified. If it is not, the conversion is defined in the current schema. The conversion name must be unique within a schema. source_encoding The source encoding name. dest_encoding The destination encoding name. function_name The function used to perform the conversion. The function name can be schema-qualified. If it is not, the function will be looked up in the path. The function must have the following signature: conv_proc( integer, -- source encoding ID integer, -- destination encoding ID cstring, -- source string (null terminated C string) internal, -- destination (fill with a null terminated C string) integer -- source string length ) RETURNS void; NOTES
Use DROP CONVERSION to remove user-defined conversions. The privileges required to create a conversion might be changed in a future release. EXAMPLES
To create a conversion from encoding UTF8 to LATIN1 using myfunc: CREATE CONVERSION myconv FOR 'UTF8' TO 'LATIN1' FROM myfunc; COMPATIBILITY
CREATE CONVERSION is a PostgreSQL extension. There is no CREATE CONVERSION statement in the SQL standard, but a CREATE TRANSLATION statement that is very similar in purpose and syntax. SEE ALSO
ALTER CONVERSION (ALTER_CONVERSION(7)), CREATE FUNCTION (CREATE_FUNCTION(7)), DROP CONVERSION (DROP_CONVERSION(7)) PostgreSQL 9.2.7 2014-02-17 CREATE CONVERSION(7)

Check Out this Related Man Page

CREATE 
SCHEMA(7) PostgreSQL 9.2.7 Documentation CREATE SCHEMA(7) NAME
CREATE_SCHEMA - define a new schema SYNOPSIS
CREATE SCHEMA schema_name [ AUTHORIZATION user_name ] [ schema_element [ ... ] ] CREATE SCHEMA AUTHORIZATION user_name [ schema_element [ ... ] ] DESCRIPTION
CREATE SCHEMA enters a new schema into the current database. The schema name must be distinct from the name of any existing schema in the current database. A schema is essentially a namespace: it contains named objects (tables, data types, functions, and operators) whose names can duplicate those of other objects existing in other schemas. Named objects are accessed either by "qualifying" their names with the schema name as a prefix, or by setting a search path that includes the desired schema(s). A CREATE command specifying an unqualified object name creates the object in the current schema (the one at the front of the search path, which can be determined with the function current_schema). Optionally, CREATE SCHEMA can include subcommands to create objects within the new schema. The subcommands are treated essentially the same as separate commands issued after creating the schema, except that if the AUTHORIZATION clause is used, all the created objects will be owned by that user. PARAMETERS
schema_name The name of a schema to be created. If this is omitted, the user_name is used as the schema name. The name cannot begin with pg_, as such names are reserved for system schemas. user_name The role name of the user who will own the new schema. If omitted, defaults to the user executing the command. To create a schema owned by another role, you must be a direct or indirect member of that role, or be a superuser. schema_element An SQL statement defining an object to be created within the schema. Currently, only CREATE TABLE, CREATE VIEW, CREATE INDEX, CREATE SEQUENCE, CREATE TRIGGER and GRANT are accepted as clauses within CREATE SCHEMA. Other kinds of objects may be created in separate commands after the schema is created. NOTES
To create a schema, the invoking user must have the CREATE privilege for the current database. (Of course, superusers bypass this check.) EXAMPLES
Create a schema: CREATE SCHEMA myschema; Create a schema for user joe; the schema will also be named joe: CREATE SCHEMA AUTHORIZATION joe; Create a schema and create a table and view within it: CREATE SCHEMA hollywood CREATE TABLE films (title text, release date, awards text[]) CREATE VIEW winners AS SELECT title, release FROM films WHERE awards IS NOT NULL; Notice that the individual subcommands do not end with semicolons. The following is an equivalent way of accomplishing the same result: CREATE SCHEMA hollywood; CREATE TABLE hollywood.films (title text, release date, awards text[]); CREATE VIEW hollywood.winners AS SELECT title, release FROM hollywood.films WHERE awards IS NOT NULL; COMPATIBILITY
The SQL standard allows a DEFAULT CHARACTER SET clause in CREATE SCHEMA, as well as more subcommand types than are presently accepted by PostgreSQL. The SQL standard specifies that the subcommands in CREATE SCHEMA can appear in any order. The present PostgreSQL implementation does not handle all cases of forward references in subcommands; it might sometimes be necessary to reorder the subcommands in order to avoid forward references. According to the SQL standard, the owner of a schema always owns all objects within it. PostgreSQL allows schemas to contain objects owned by users other than the schema owner. This can happen only if the schema owner grants the CREATE privilege on his schema to someone else, or a superuser chooses to create objects in it. SEE ALSO
ALTER SCHEMA (ALTER_SCHEMA(7)), DROP SCHEMA (DROP_SCHEMA(7)) PostgreSQL 9.2.7 2014-02-17 CREATE SCHEMA(7)
Man Page