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)

CREATE 
COLLATION(7)					  PostgreSQL 9.2.7 Documentation				       CREATE COLLATION(7)

NAME

       CREATE_COLLATION - define a new collation

SYNOPSIS

       CREATE COLLATION name (
	   [ LOCALE = locale, ]
	   [ LC_COLLATE = lc_collate, ]
	   [ LC_CTYPE = lc_ctype ]
       )
       CREATE COLLATION name FROM existing_collation

DESCRIPTION

       CREATE COLLATION defines a new collation using the specified operating system locale settings, or by copying an existing collation.

       To be able to create a collation, you must have CREATE privilege on the destination schema.

PARAMETERS

       name
	   The name of the collation. The collation name can be schema-qualified. If it is not, the collation is defined in the current schema.
	   The collation name must be unique within that schema. (The system catalogs can contain collations with the same name for other
	   encodings, but these are ignored if the database encoding does not match.)

       locale
	   This is a shortcut for setting LC_COLLATE and LC_CTYPE at once. If you specify this, you cannot specify either of those parameters.

       lc_collate
	   Use the specified operating system locale for the LC_COLLATE locale category. The locale must be applicable to the current database
	   encoding. (See CREATE DATABASE (CREATE_DATABASE(7)) for the precise rules.)

       lc_ctype
	   Use the specified operating system locale for the LC_CTYPE locale category. The locale must be applicable to the current database
	   encoding. (See CREATE DATABASE (CREATE_DATABASE(7)) for the precise rules.)

       existing_collation
	   The name of an existing collation to copy. The new collation will have the same properties as the existing one, but it will be an
	   independent object.

NOTES

       Use DROP COLLATION to remove user-defined collations.

       See Section 22.2, "Collation Support", in the documentation for more information about collation support in PostgreSQL.

EXAMPLES

       To create a collation from the operating system locale fr_FR.utf8 (assuming the current database encoding is UTF8):

	   CREATE COLLATION french (LOCALE = 'fr_FR.utf8');

       To create a collation from an existing collation:

	   CREATE COLLATION german FROM "de_DE";

       This can be convenient to be able to use operating-system-independent collation names in applications.

COMPATIBILITY

       There is a CREATE COLLATION statement in the SQL standard, but it is limited to copying an existing collation. The syntax to create a new
       collation is a PostgreSQL extension.

SEE ALSO

       ALTER COLLATION (ALTER_COLLATION(7)), DROP COLLATION (DROP_COLLATION(7))

PostgreSQL 9.2.7						    2014-02-17						       CREATE COLLATION(7)