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CREATE CONVERSION(7)	PostgreSQL 9.6.20 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 9.6.20		     2020		  CREATE CONVERSION(7)
NAME | SYNOPSIS | DESCRIPTION | PARAMETERS | NOTES | EXAMPLES | COMPATIBILITY | SEE ALSO

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=CREATE_CONVERSION&sektion=7&manpath=FreeBSD+13.0-RELEASE+and+Ports>

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