BUG#9911 RENAME TABLE of type ARCHIVE fails with .ARN file error

 - Different behaviuor in 5.0 pushes a warning when renaming a non existent file. Avoid that by checking that the file exists before renaming.


mysql-test/r/archive.result:
  Warning is not produced anymore
sql/examples/ha_archive.cc:
  Change ha_archive::rename_table to avoid warning when trying to rename non existent file.

mysql-test/r/archive.result

@@ -192,8 +192,6 @@ select count(*) from t3;
 count(*)
 1199
 rename table t3 to t4;
-Warnings:
-Error	7	Error on rename of './test/t3.ARN' to './test/t4.ARN' (Errcode: 2)
 select * from t4 where fld3='bonfire';
 auto	fld1	companynr	fld3	fld4	fld5	fld6
 1191	068504	00	bonfire	corresponds	positively	

sql/examples/ha_archive.cc

@@ -455,17 +455,22 @@ const char **ha_archive::bas_ext() const
 int ha_archive::rename_table(const char * from, const char * to)
 {
   DBUG_ENTER("ha_archive::rename_table");
+  DBUG_PRINT("enter", ("from: %s, to: %s", from, to));
   for (const char **ext=bas_ext(); *ext ; ext++)
   {
-    if (rename_file_ext(from,to,*ext))
+    // Check if the .arn file exists before rename
+    if (!my_strcasecmp(system_charset_info, *ext, ARN))
     {
-      if (my_errno == ENOENT &&
-          !my_strcasecmp(system_charset_info, *ext, ARN))
+      char name[FN_REFLEN];
+      (void)strxnmov(name, FN_REFLEN, from, ARN, NullS);
+      if (access(name, F_OK))
+      {
+        DBUG_PRINT("info", ("%s does not exist on disk, skipping it", name));
         continue;
-
-      DBUG_RETURN(my_errno);
+      }
     }
-
+    if (rename_file_ext(from,to,*ext))
+      DBUG_RETURN(my_errno);
   }
   DBUG_RETURN(0);
 }