Re: Proposal: CREATE CONVERSION

Here is a proposal for new pg_conversion system table. Comments?

/*-------------------------------------------------------------------------
*
* pg_conversion.h
* definition of the system "conversion" relation (pg_conversion)
* along with the relation's initial contents.
*
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id$
*
* NOTES
* the genbki.sh script reads this file and generates .bki
* information from the DATA() statements.
*
*-------------------------------------------------------------------------
*/
#ifndef PG_CONVERSION_H
#define PG_CONVERSION_H

/* ----------------
* postgres.h contains the system type definitions and the
* CATALOG(), BOOTSTRAP and DATA() sugar words so this file
* can be read by both genbki.sh and the C compiler.
* ----------------
*/

/* ----------------------------------------------------------------
* pg_conversion definition.
*
* cpp turns this into typedef struct FormData_pg_namespace
*
* conname name of the conversion
* connamespace name space which the conversion belongs to
* conowner ower of the conversion
* conforencoding FOR encoding id
* contoencoding TO encoding id
* conproc OID of the conversion proc
* ----------------------------------------------------------------
*/
CATALOG(pg_conversion)
{
NameData conname;
Oid connamespace;
int4 conowner;
int4 conforencoding;
int4 contoencoding;
Oid conproc;
} FormData_pg_conversion;

/* ----------------
* Form_pg_conversion corresponds to a pointer to a tuple with
* the format of pg_conversion relation.
* ----------------
*/
typedef FormData_pg_conversion *Form_pg_conversion;

/* ----------------
* compiler constants for pg_conversion
* ----------------
*/

#define Natts_pg_conversion 6
#define Anum_pg_conversion_conpname 1
#define Anum_pg_conversion_connamespace 2
#define Anum_pg_conversion_conowner 3
#define Anum_pg_conversion_conforencoding 4
#define Anum_pg_conversion_contoencoding 5
#define Anum_pg_conversion_conproc 6

/* ----------------
* initial contents of pg_conversion
* ---------------
*/

/*
* prototypes for functions in pg_conversion.c
*/
extern Oid ConversionCreate(const char *conname, Oid connamespace,
int32 conowner,
int4 conforencoding, int4 contoencoding,
Oid conproc);

#endif /* PG_CONVERSION_H */