/usr/man2/cat.l/create_conversion.l.Z

NAME

       CREATE CONVERSION - define a new encoding conversion

SYNOPSIS

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

DESCRIPTION

       CREATE CONVERSION defines a new conversion between character set encod-
       ings. Conversion names may be used in the convert function to specify a
       particular  encoding  conversion.  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 may  be  schema-
              qualified.  If  it is not, the conversion is defined in the cur-
              rent schema. The conversion name must be unique within a schema.

       source_encoding
              The source encoding name.

       dest_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)
                  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 may 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  CON-
       VERSION statement in the SQL standard.

SEE ALSO

       ALTER  CONVERSION  [alter_conversion(l)], CREATE FUNCTION [create_func-
       tion(l)], DROP CONVERSION [drop_conversion(l)]

SQL - Language Statements         2005-11-05               CREATE CONVERSION()