add testcase for statement_history and standby_statement_history

src/test/regress/input/pg_proc_test.source

@@ -1,2 +1,10 @@
 select provariadic,oid, proname from pg_proc where arraycontains(proargmodes::char[],ARRAY['v'::char]) order by oid;
 select prokind,length(prokind),count(*) from pg_proc where oid < 16384 group by prokind;
+
+-- The structure of function standby_statement_history must be consistent with table statement_history.
+select
+    (select relnatts from pg_class where relname = 'statement_history' limit 1)
+    =
+    (select array_length(proargnames, 1) - 1 from pg_proc where proname = 'standby_statement_history' order by 1 limit 1)
+    as issame;
+

src/test/regress/output/pg_proc_test.source

@@ -34,3 +34,14 @@ select prokind,length(prokind),count(*) from pg_proc where oid < 16384 group by
 --? f       |      1 |  .*
 (1 row)
 
+-- The structure of function standby_statement_history must be consistent with table statement_history.
+select
+    (select relnatts from pg_class where relname = 'statement_history' limit 1)
+    =
+    (select array_length(proargnames, 1) - 1 from pg_proc where proname = 'standby_statement_history' order by 1 limit 1)
+    as issame;
+ issame 
+--------
+ t
+(1 row)
+