1/*-------------------------------------------------------------------------
2 *
3 * pg_shdepend.h
4 * definition of the "shared dependency" system catalog (pg_shdepend)
5 *
6 * pg_shdepend has no preloaded contents, so there is no pg_shdepend.dat
7 * file; system-defined dependencies are loaded into it during a late stage
8 * of the initdb process.
9 *
10 * NOTE: we do not represent all possible dependency pairs in pg_shdepend;
11 * for example, there's not much value in creating an explicit dependency
12 * from a relation to its database. Currently, only dependencies on roles
13 * are explicitly stored in pg_shdepend.
14 *
15 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
16 * Portions Copyright (c) 1994, Regents of the University of California
17 *
18 * src/include/catalog/pg_shdepend.h
19 *
20 * NOTES
21 * The Catalog.pm module reads this file and derives schema
22 * information.
23 *
24 *-------------------------------------------------------------------------
25 */
26#ifndef PG_SHDEPEND_H
27#define PG_SHDEPEND_H
28
29#include "catalog/genbki.h"
30#include "catalog/pg_shdepend_d.h"
31
32/* ----------------
33 * pg_shdepend definition. cpp turns this into
34 * typedef struct FormData_pg_shdepend
35 * ----------------
36 */
37CATALOG(pg_shdepend,1214,SharedDependRelationId) BKI_SHARED_RELATION
38{
39 /*
40 * Identification of the dependent (referencing) object.
41 *
42 * These fields are all zeroes for a DEPENDENCY_PIN entry. Also, dbid can
43 * be zero to denote a shared object.
44 */
45 Oid dbid; /* OID of database containing object */
46 Oid classid; /* OID of table containing object */
47 Oid objid; /* OID of object itself */
48 int32 objsubid; /* column number, or 0 if not used */
49
50 /*
51 * Identification of the independent (referenced) object. This is always
52 * a shared object, so we need no database ID field. We don't bother with
53 * a sub-object ID either.
54 */
55 Oid refclassid; /* OID of table containing object */
56 Oid refobjid; /* OID of object itself */
57
58 /*
59 * Precise semantics of the relationship are specified by the deptype
60 * field. See SharedDependencyType in catalog/dependency.h.
61 */
62 char deptype; /* see codes in dependency.h */
63} FormData_pg_shdepend;
64
65/* ----------------
66 * Form_pg_shdepend corresponds to a pointer to a row with
67 * the format of pg_shdepend relation.
68 * ----------------
69 */
70typedef FormData_pg_shdepend *Form_pg_shdepend;
71
72#endif /* PG_SHDEPEND_H */
73