diff --git a/src/include/tcop/variable.h b/src/include/tcop/variable.h
index 4792cac9656114e53f4fd36532530a88c75f1f8f..dbe1b5babd85bf8f16784b00066a8fb9c66cc25d 100644
--- a/src/include/tcop/variable.h
+++ b/src/include/tcop/variable.h
@@ -2,9 +2,11 @@
  * Headers for handling of 'SET var TO', 'SHOW var' and 'RESET var'
  * statements
  *
- * $Id: variable.h,v 1.6 1997/09/08 02:39:21 momjian Exp $
+ * $Id: variable.h,v 1.7 1997/11/07 06:45:16 thomas Exp $
  *
  */
+#ifndef VARIABLE_H
+#define VARIABLE_H 1
 
 enum DateFormat
 {
@@ -27,3 +29,30 @@ extern struct PGVariables PGVariables;
 bool		SetPGVariable(const char *, const char *);
 bool		GetPGVariable(const char *);
 bool		ResetPGVariable(const char *);
+
+extern bool set_date(void);
+extern bool show_date(void);
+extern bool reset_date(void);
+extern bool parse_date(const char *);
+extern bool set_timezone(void);
+extern bool show_timezone(void);
+extern bool reset_timezone(void);
+extern bool parse_timezone(const char *);
+extern bool set_cost_heap(void);
+extern bool show_cost_heap(void);
+extern bool reset_cost_heap(void);
+extern bool parse_cost_heap(const char *);
+extern bool set_cost_index(void);
+extern bool show_cost_index(void);
+extern bool reset_cost_index(void);
+extern bool parse_cost_index(const char *);
+extern bool set_r_plans(void);
+extern bool show_r_plans(void);
+extern bool reset_r_plans(void);
+extern bool parse_r_plans(const char *);
+extern bool set_geqo(void);
+extern bool show_geqo(void);
+extern bool reset_geqo(void);
+extern bool parse_geqo(const char *);
+
+#endif /* VARIABLE_H */