Provided by: postgresql-client-8.4_8.4.11-1_i386 bug

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
       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.

       funcname
              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.

SEE ALSO

       ALTER     CONVERSION     [alter_conversion(7)],     CREATE     FUNCTION
       [create_function(7)], DROP CONVERSION [drop_conversion(7)]