Add some assertions to view reloption macros

In these macros, the rd_options pointer is cast to ViewOption *.  Add
some assertions that the passed-in relation is actually a view before
doing that.

Author: Nikolay Shaplov <dhyan@nataraj.su>
Discussion: https://www.postgresql.org/message-id/flat/3634983.eHpMQ1mJnI@x200m

Author: petere

src/include/utils/rel.h

@@ -351,17 +351,19 @@ typedef struct ViewOptions
  *		Returns whether the relation is security view, or not.  Note multiple
  *		eval of argument!
  */
-#define RelationIsSecurityView(relation)	\
-	((relation)->rd_options ?				\
-	 ((ViewOptions *) (relation)->rd_options)->security_barrier : false)
+#define RelationIsSecurityView(relation)									\
+	(AssertMacro(relation->rd_rel->relkind == RELKIND_VIEW),				\
+	 (relation)->rd_options ?												\
+	  ((ViewOptions *) (relation)->rd_options)->security_barrier : false)
 
 /*
  * RelationHasCheckOption
  *		Returns true if the relation is a view defined with either the local
  *		or the cascaded check option.  Note multiple eval of argument!
  */
 #define RelationHasCheckOption(relation)									\
-	((relation)->rd_options &&												\
+	(AssertMacro(relation->rd_rel->relkind == RELKIND_VIEW),				\
+	 (relation)->rd_options &&												\
 	 ((ViewOptions *) (relation)->rd_options)->check_option !=				\
 	 VIEW_OPTION_CHECK_OPTION_NOT_SET)
 
@@ -371,7 +373,8 @@ typedef struct ViewOptions
  *		option.  Note multiple eval of argument!
  */
 #define RelationHasLocalCheckOption(relation)								\
-	((relation)->rd_options &&												\
+	(AssertMacro(relation->rd_rel->relkind == RELKIND_VIEW),				\
+	 (relation)->rd_options &&												\
 	 ((ViewOptions *) (relation)->rd_options)->check_option ==				\
 	 VIEW_OPTION_CHECK_OPTION_LOCAL)
 
@@ -381,7 +384,8 @@ typedef struct ViewOptions
  *		option.  Note multiple eval of argument!
  */
 #define RelationHasCascadedCheckOption(relation)							\
-	((relation)->rd_options &&												\
+	(AssertMacro(relation->rd_rel->relkind == RELKIND_VIEW),				\
+	 (relation)->rd_options &&												\
 	 ((ViewOptions *) (relation)->rd_options)->check_option ==				\
 	  VIEW_OPTION_CHECK_OPTION_CASCADED)