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CREATE CONVERSION(7)	PostgreSQL 9.3.2 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 9.3.2		     2013		  CREATE CONVERSION(7)
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