database.mod/postgresql.mod/include/catalog/pg_init_privs.h

/*-------------------------------------------------------------------------
 *
 * pg_init_privs.h
 *	  definition of the "initial privileges" system catalog (pg_init_privs)
 *
 * NOTE: an object is identified by the OID of the row that primarily
 * defines the object, plus the OID of the table that that row appears in.
 * For example, a function is identified by the OID of its pg_proc row
 * plus the pg_class OID of table pg_proc.  This allows unique identification
 * of objects without assuming that OIDs are unique across tables.
 *
 * Since attributes don't have OIDs of their own, we identify an attribute
 * privilege by the objoid+classoid of its parent table, plus an "objsubid"
 * giving the attribute column number.  "objsubid" must be zero in a privilege
 * for a table itself, so that it is distinct from any column privilege.
 * Currently, objsubid is unused and zero for all other kinds of objects.
 *
 * Because the contents of this table depend on what is done with the other
 * objects in the system (and, in particular, may change due to changes in
 * system_views.sql), there is no pg_init_privs.dat file. The initial contents
 * are loaded near the end of initdb.
 *
 *
 * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/catalog/pg_init_privs.h
 *
 * NOTES
 *	  The Catalog.pm module reads this file and derives schema
 *	  information.
 *
 *-------------------------------------------------------------------------
 */
#ifndef PG_INIT_PRIVS_H
#define PG_INIT_PRIVS_H

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

/* ----------------
 *		pg_init_privs definition.  cpp turns this into
 *		typedef struct FormData_pg_init_privs
 * ----------------
 */
CATALOG(pg_init_privs,3394,InitPrivsRelationId)
{
	Oid			objoid;			/* OID of object itself */
	Oid			classoid BKI_LOOKUP(pg_class);	/* OID of table containing
												 * object */
	int32		objsubid;		/* column number, or 0 if not used */
	char		privtype;		/* from initdb or extension? */

#ifdef CATALOG_VARLEN			/* variable-length fields start here */
	aclitem		initprivs[1] BKI_FORCE_NOT_NULL;	/* initial privs on object */
#endif
} FormData_pg_init_privs;

/* ----------------
 *		Form_pg_init_privs corresponds to a pointer to a tuple with
 *		the format of pg_init_privs relation.
 * ----------------
 */
typedef FormData_pg_init_privs * Form_pg_init_privs;

DECLARE_TOAST(pg_init_privs, 4155, 4156);

DECLARE_UNIQUE_INDEX_PKEY(pg_init_privs_o_c_o_index, 3395, InitPrivsObjIndexId, on pg_init_privs using btree(objoid oid_ops, classoid oid_ops, objsubid int4_ops));

/*
 * It is important to know if the initial privileges are from initdb or from an
 * extension.  This enum is used to provide that differentiation and the two
 * places which populate this table (initdb and during CREATE EXTENSION, see
 * recordExtensionInitPriv()) know to use the correct values.
 */

typedef enum InitPrivsType
{
	INITPRIVS_INITDB = 'i',
	INITPRIVS_EXTENSION = 'e'
} InitPrivsType;

#endif							/* PG_INIT_PRIVS_H */