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pg_include/catalog/pg_depend.h

@@ -0,0 +1,90 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_depend.h
+ *	  definition of the system "dependency" relation (pg_depend)
+ *	  along with the relation's initial contents.
+ *
+ *
+ * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/catalog/pg_depend.h
+ *
+ * NOTES
+ *	  the genbki.pl script reads this file and generates .bki
+ *	  information from the DATA() statements.
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_DEPEND_H
+#define PG_DEPEND_H
+
+#include "catalog/genbki.h"
+
+/* ----------------
+ *		pg_depend definition.  cpp turns this into
+ *		typedef struct FormData_pg_depend
+ * ----------------
+ */
+#define DependRelationId  2608
+
+CATALOG(pg_depend,2608) BKI_WITHOUT_OIDS
+{
+	/*
+	 * Identification of the dependent (referencing) object.
+	 *
+	 * These fields are all zeroes for a DEPENDENCY_PIN entry.
+	 */
+	Oid			classid;		/* OID of table containing object */
+	Oid			objid;			/* OID of object itself */
+	int4		objsubid;		/* column number, or 0 if not used */
+
+	/*
+	 * Identification of the independent (referenced) object.
+	 */
+	Oid			refclassid;		/* OID of table containing object */
+	Oid			refobjid;		/* OID of object itself */
+	int4		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;
+
+/* ----------------
+ *		compiler constants for pg_depend
+ * ----------------
+ */
+#define Natts_pg_depend				7
+#define Anum_pg_depend_classid		1
+#define Anum_pg_depend_objid		2
+#define Anum_pg_depend_objsubid		3
+#define Anum_pg_depend_refclassid	4
+#define Anum_pg_depend_refobjid		5
+#define Anum_pg_depend_refobjsubid	6
+#define Anum_pg_depend_deptype		7
+
+
+/*
+ * pg_depend has no preloaded contents; 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.
+ */
+
+#endif   /* PG_DEPEND_H */