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db_include/catalog/pg_depend.h

@@ -0,0 +1,80 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_depend.h
+ *	  definition of the "dependency" system catalog (pg_depend)
+ *
+ * pg_depend has no preloaded contents, so there is no pg_depend.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_depend;
+ * for example, there's not much value in creating an explicit dependency
+ * from an attribute to its relation.  Usually we make a dependency for
+ * cases where the relationship is conditional rather than essential
+ * (for example, not all triggers are dependent on constraints, but all
+ * attributes are dependent on relations) or where the dependency is not
+ * convenient to find from the contents of other catalogs.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/catalog/pg_depend.h
+ *
+ * NOTES
+ *	  The Catalog.pm module reads this file and derives schema
+ *	  information.
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_DEPEND_H
+#define PG_DEPEND_H
+
+#include "catalog/genbki.h"
+#include "catalog/pg_depend_d.h"
+
+/* ----------------
+ *		pg_depend definition.  cpp turns this into
+ *		typedef struct FormData_pg_depend
+ * ----------------
+ */
+CATALOG(pg_depend,2608,DependRelationId)
+{
+	/*
+	 * Identification of the dependent (referencing) object.
+	 *
+	 * These fields are all zeroes for a DEPENDENCY_PIN entry.
+	 */
+	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.
+	 */
+	Oid			refclassid BKI_LOOKUP(pg_class);	/* OID of table containing
+													 * object */
+	Oid			refobjid;		/* OID of object itself */
+	int32		refobjsubid;	/* column number, or 0 if not used */
+
+	/*
+	 * Precise semantics of the relationship are specified by the deptype
+	 * field.  See DependencyType in catalog/dependency.h.
+	 */
+	char		deptype;		/* see codes in dependency.h */
+} FormData_pg_depend;
+
+/* ----------------
+ *		Form_pg_depend corresponds to a pointer to a row with
+ *		the format of pg_depend relation.
+ * ----------------
+ */
+typedef FormData_pg_depend *Form_pg_depend;
+
+DECLARE_INDEX(pg_depend_depender_index, 2673, on pg_depend using btree(classid oid_ops, objid oid_ops, objsubid int4_ops));
+#define DependDependerIndexId  2673
+DECLARE_INDEX(pg_depend_reference_index, 2674, on pg_depend using btree(refclassid oid_ops, refobjid oid_ops, refobjsubid int4_ops));
+#define DependReferenceIndexId	2674
+
+#endif							/* PG_DEPEND_H */