pg_am.h

Go to the documentation of this file.

/*-------------------------------------------------------------------------
 *
 * pg_am.h
 *    definition of the "access method" system catalog (pg_am)
 *
 *
 * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/catalog/pg_am.h
 *
 * NOTES
 *    The Catalog.pm module reads this file and derives schema
 *    information.
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_AM_H
#define PG_AM_H

#include "catalog/genbki.h"
#include "catalog/pg_am_d.h"

/* ----------------
 *      pg_am definition.  cpp turns this into
 *      typedef struct FormData_pg_am
 * ----------------
 */
CATALOG(pg_am,2601,AccessMethodRelationId)
{
    Oid         oid;            /* oid */

    /* access method name */
    NameData    amname;

    /* handler function */
    regproc     amhandler BKI_LOOKUP(pg_proc);

    /* see AMTYPE_xxx constants below */
    char        amtype;
} FormData_pg_am;

/* ----------------
 *      Form_pg_am corresponds to a pointer to a tuple with
 *      the format of pg_am relation.
 * ----------------
 */
typedef FormData_pg_am *Form_pg_am;

#ifdef EXPOSE_TO_CLIENT_CODE

/*
 * Allowed values for amtype
 */
#define AMTYPE_INDEX                    'i' /* index access method */
#define AMTYPE_TABLE                    't' /* table access method */

#endif                          /* EXPOSE_TO_CLIENT_CODE */

#endif                          /* PG_AM_H */