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create_conversion(7) [redhat man page]

CREATE 
CONVERSION(7)						   SQL Commands 					      CREATE CONVERSION(7)

NAME

       CREATE CONVERSION - define a user-defined conversion

SYNOPSIS

       CREATE [DEFAULT] CONVERSION conversion_name
	   FOR source_encoding TO dest_encoding FROM funcname

DESCRIPTION

       CREATE  CONVERSION defines a new encoding conversion. Conversion names may be used in the CONVERT() function to specify a particular encod-
       ing conversion. Also, conversions that are marked DEFAULT can be used for automatic encoding conversion between frontend and  backend.  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 the execute right on the function and the create right on the destination schema.  "PARAM-
       ETERS"

       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.

       conversion_name
	      The  name  of  the  conversion.  The conversion name may 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.

       source_encoding
	      The destination encoding name.

       funcname
	      The function used to perform the conversion. The function name may 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)
		   CSTRING,  -- destination string (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 may be changed in a future release.

EXAMPLES

       To create a conversion from encoding UNICODE to LATIN1 using myfunc:

       CREATE CONVERSION myconv FOR 'UNICODE' TO 'LATIN1' FROM myfunc;

COMPATIBILITY

       CREATE CONVERSION is a PostgreSQL extension.  There is no CREATE CONVERSION statement in SQL99.

SEE ALSO

       CREATE FUNCTION [create_function(7)], DROP CONVERSION [drop_conversion(7)], PostgreSQL Programmer's Guide

SQL - Language Statements					    2002-11-22						      CREATE CONVERSION(7)

Check Out this Related 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)
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