pg_conversion.h

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/*-------------------------------------------------------------------------
 *
 * pg_conversion.h
 *    definition of the "conversion" system catalog (pg_conversion)
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/catalog/pg_conversion.h
 *
 * NOTES
 *    The Catalog.pm module reads this file and derives schema
 *    information.
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_CONVERSION_H
#define PG_CONVERSION_H
 
#include "catalog/genbki.h"
#include "catalog/objectaddress.h"
#include "catalog/pg_conversion_d.h"    /* IWYU pragma: export */
 
/* ----------------
 *      pg_conversion definition.  cpp turns this into
 *      typedef struct FormData_pg_conversion
 * ----------------
 */
CATALOG(pg_conversion,2607,ConversionRelationId)
{
    /* oid */
    Oid         oid;
 
    /* name of the conversion */
    NameData    conname;
 
    /* namespace that the conversion belongs to */
    Oid         connamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
    /* owner of the conversion */
    Oid         conowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
    /* FOR encoding id */
    int32       conforencoding BKI_LOOKUP(encoding);
 
    /* TO encoding id */
    int32       contoencoding BKI_LOOKUP(encoding);
 
    /* OID of the conversion proc */
    regproc     conproc BKI_LOOKUP(pg_proc);
 
    /* true if this is a default conversion */
    bool        condefault BKI_DEFAULT(t);
} 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;
 
DECLARE_UNIQUE_INDEX(pg_conversion_default_index, 2668, ConversionDefaultIndexId, pg_conversion, btree(connamespace oid_ops, conforencoding int4_ops, contoencoding int4_ops, oid oid_ops));
DECLARE_UNIQUE_INDEX(pg_conversion_name_nsp_index, 2669, ConversionNameNspIndexId, pg_conversion, btree(conname name_ops, connamespace oid_ops));
DECLARE_UNIQUE_INDEX_PKEY(pg_conversion_oid_index, 2670, ConversionOidIndexId, pg_conversion, btree(oid oid_ops));
 
MAKE_SYSCACHE(CONDEFAULT, pg_conversion_default_index, 8);
MAKE_SYSCACHE(CONNAMENSP, pg_conversion_name_nsp_index, 8);
MAKE_SYSCACHE(CONVOID, pg_conversion_oid_index, 8);
 
 
extern ObjectAddress ConversionCreate(const char *conname, Oid connamespace,
                                      Oid conowner,
                                      int32 conforencoding, int32 contoencoding,
                                      Oid conproc, bool def);
extern Oid  FindDefaultConversion(Oid name_space, int32 for_encoding,
                                  int32 to_encoding);
 
#endif                          /* PG_CONVERSION_H */