init

db_include/catalog/pg_shdepend.h

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+/*-------------------------------------------------------------------------
+ *
+ * pg_shdepend.h
+ *	  definition of the "shared dependency" system catalog (pg_shdepend)
+ *
+ * pg_shdepend has no preloaded contents, so there is no pg_shdepend.dat
+ * file; system-defined dependencies are loaded into it during a late stage
+ * of the initdb process.
+ *
+ * NOTE: we do not represent all possible dependency pairs in pg_shdepend;
+ * for example, there's not much value in creating an explicit dependency
+ * from a relation to its database.  Currently, only dependencies on roles
+ * are explicitly stored in pg_shdepend.
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/catalog/pg_shdepend.h
+ *
+ * NOTES
+ *	  The Catalog.pm module reads this file and derives schema
+ *	  information.
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_SHDEPEND_H
+#define PG_SHDEPEND_H
+
+#include "catalog/genbki.h"
+#include "catalog/pg_shdepend_d.h"
+
+/* ----------------
+ *		pg_shdepend definition.  cpp turns this into
+ *		typedef struct FormData_pg_shdepend
+ * ----------------
+ */
+CATALOG(pg_shdepend,1214,SharedDependRelationId) BKI_SHARED_RELATION
+{
+	/*
+	 * Identification of the dependent (referencing) object.
+	 *
+	 * These fields are all zeroes for a DEPENDENCY_PIN entry.  Also, dbid can
+	 * be zero to denote a shared object.
+	 */
+	Oid			dbid BKI_LOOKUP_OPT(pg_database);	/* OID of database
+													 * containing object */
+	Oid			classid BKI_LOOKUP_OPT(pg_class);	/* OID of table containing
+													 * object */
+	Oid			objid;			/* OID of object itself */
+	int32		objsubid;		/* column number, or 0 if not used */
+
+	/*
+	 * Identification of the independent (referenced) object.  This is always
+	 * a shared object, so we need no database ID field.  We don't bother with
+	 * a sub-object ID either.
+	 */
+	Oid			refclassid BKI_LOOKUP(pg_class);	/* OID of table containing
+													 * object */
+	Oid			refobjid;		/* OID of object itself */
+
+	/*
+	 * Precise semantics of the relationship are specified by the deptype
+	 * field.  See SharedDependencyType in catalog/dependency.h.
+	 */
+	char		deptype;		/* see codes in dependency.h */
+} FormData_pg_shdepend;
+
+/* ----------------
+ *		Form_pg_shdepend corresponds to a pointer to a row with
+ *		the format of pg_shdepend relation.
+ * ----------------
+ */
+typedef FormData_pg_shdepend *Form_pg_shdepend;
+
+DECLARE_INDEX(pg_shdepend_depender_index, 1232, on pg_shdepend using btree(dbid oid_ops, classid oid_ops, objid oid_ops, objsubid int4_ops));
+#define SharedDependDependerIndexId		1232
+DECLARE_INDEX(pg_shdepend_reference_index, 1233, on pg_shdepend using btree(refclassid oid_ops, refobjid oid_ops));
+#define SharedDependReferenceIndexId	1233
+
+#endif							/* PG_SHDEPEND_H */