Changes after discussion/review with Sanja

sql/parse_file.cc:
  Fix after discussion/review with Sanja: removed rename_view from sql_view to general function rename_in_schema_file
  (so it can be used for other .frm types like triggers too)
sql/parse_file.h:
  added prototype for rename_in_schema_file
sql/sql_rename.cc:
  simplified code (thanks to Sanja)
sql/sql_view.cc:
  moved rename_view_files to rename_in_schema_file (parse_file.cc)
  corrected MYF parameter from MY_WME to 0.

sql/parse_file.cc

@@ -333,6 +333,59 @@ err_w_file:
   DBUG_RETURN(TRUE);
 }
 
+/*
+  Renames a frm file (including backups) in same schema
+
+  SYNOPSIS
+    rename_in_schema_file
+    schema            name of given schema           
+    old_name          original file name
+    new_name          new file name
+    revision          revision number
+    num_view_backups  number of backups
+
+  RETURN
+    0 - OK 
+    1 - Error (only if renaming of frm failed)
+
+*/
+my_bool rename_in_schema_file(const char *schema, const char *old_name, 
+                              const char *new_name, ulonglong revision, 
+                              uint num_view_backups)
+{
+  char old_path[FN_REFLEN], new_path[FN_REFLEN], arc_path[FN_REFLEN];
+
+  strxnmov(old_path, FN_REFLEN, mysql_data_home, "/", schema, "/",
+           old_name, reg_ext, NullS);
+  (void) unpack_filename(old_path, old_path);
+
+  strxnmov(new_path, FN_REFLEN, mysql_data_home, "/", schema, "/",
+           new_name, reg_ext, NullS);
+  (void) unpack_filename(new_path, new_path);
+
+  if (my_rename(old_path, new_path, MYF(MY_WME)))
+    return 1;
+
+  /* check if arc_dir exists */
+  strxnmov(arc_path, FN_REFLEN, mysql_data_home, "/", schema, "/arc", NullS);
+  (void) unpack_filename(arc_path, arc_path);
+  
+  if (revision > 0 && !access(arc_path, F_OK))
+  {
+    ulonglong limit= (revision > num_view_backups) ? revision - num_view_backups : 0;
+    while (revision > limit) {
+      my_snprintf(old_path, FN_REFLEN, "%s/%s%s-%04lu",
+		  arc_path, old_name, reg_ext, (ulong)revision);
+      (void) unpack_filename(old_path, old_path);
+      my_snprintf(new_path, FN_REFLEN, "%s/%s%s-%04lu",
+		  arc_path, new_name, reg_ext, (ulong)revision);
+      (void) unpack_filename(new_path, new_path);
+      my_rename(old_path, new_path, MYF(0));
+      revision--;
+    }
+  }
+  return 0;
+}
 
 /*
   Prepare frm to parse (read to memory)

sql/parse_file.h

@@ -48,6 +48,9 @@ my_bool
 sql_create_definition_file(const LEX_STRING *dir, const  LEX_STRING *file_name,
 			   const LEX_STRING *type,
 			   gptr base, File_option *parameters, uint versions);
+my_bool rename_in_schema_file(const char *schema, const char *old_name, 
+                              const char *new_name, ulonglong revision, 
+                              uint num_view_backups);
 
 class File_parser: public Sql_alloc
 {

sql/sql_rename.cc

@@ -138,7 +138,7 @@ rename_tables(THD *thd, TABLE_LIST *table_list, bool skip_error)
 
   for (ren_table= table_list; ren_table; ren_table= new_table->next_local)
   {
-    db_type table_type;
+    int rc= 1;
     char name[FN_REFLEN];
     const char *new_alias, *old_alias;
 
@@ -165,21 +165,20 @@ rename_tables(THD *thd, TABLE_LIST *table_list, bool skip_error)
 	    ren_table->db, old_alias,
 	    reg_ext);
     unpack_filename(name, name);
-    if ((frm_type= mysql_frm_type(name)) == FRMTYPE_TABLE &&
-        (table_type= get_table_type(thd, name)) == DB_TYPE_UNKNOWN)
-    {
-      my_error(ER_FILE_NOT_FOUND, MYF(0), name, my_errno);
-      if (!skip_error)
-        DBUG_RETURN(ren_table);
-    }
-    else {
-      int rc= 1;
+
+    frm_type= mysql_frm_type(name);
     switch (frm_type)
     {
       case FRMTYPE_TABLE:
+      {
+        db_type table_type;
+        if ((table_type= get_table_type(thd, name)) == DB_TYPE_UNKNOWN) 
+          my_error(ER_FILE_NOT_FOUND, MYF(0), name, my_errno);
+        else
           rc= mysql_rename_table(table_type, ren_table->db, old_alias,
                                  new_table->db, new_alias);
         break;
+      }
       case FRMTYPE_VIEW:
         /* change of schema is not allowed */
         if (strcmp(ren_table->db, new_table->db))
@@ -188,13 +187,14 @@ rename_tables(THD *thd, TABLE_LIST *table_list, bool skip_error)
         else
           rc= mysql_rename_view(thd, new_alias, ren_table);
         break;
-        case FRMTYPE_ERROR:
       default:
+        DBUG_ASSERT(0); // should never happen
+      case FRMTYPE_ERROR:
         my_error(ER_FILE_NOT_FOUND, MYF(0), name, my_errno);
+        break;
     }
     if (rc && !skip_error)
       DBUG_RETURN(ren_table);
   }
-  }
   DBUG_RETURN(0);
 }

sql/sql_view.cc

@@ -1167,7 +1167,7 @@ frm_type_enum mysql_frm_type(char *path)
   int length;
   DBUG_ENTER("mysql_frm_type");
 
-  if ((file= my_open(path, O_RDONLY | O_SHARE, MYF(MY_WME))) < 0)
+  if ((file= my_open(path, O_RDONLY | O_SHARE, MYF(0))) < 0)
   {
     DBUG_RETURN(FRMTYPE_ERROR);
   }
@@ -1372,43 +1372,21 @@ int view_checksum(THD *thd, TABLE_LIST *view)
           HA_ADMIN_OK);
 }
 
-bool rename_view_files(const char *schema, const char *old_name, 
-                       const char *new_name, ulonglong revision)
-{
-  char old_path[FN_REFLEN], new_path[FN_REFLEN], arc_path[FN_REFLEN];
-
-  strxnmov(old_path, FN_REFLEN, mysql_data_home, "/", schema, "/",
-           old_name, reg_ext, NullS);
-  (void) unpack_filename(old_path, old_path);
-
-  strxnmov(new_path, FN_REFLEN, mysql_data_home, "/", schema, "/",
-           new_name, reg_ext, NullS);
-  (void) unpack_filename(new_path, new_path);
-
-  if (my_rename(old_path, new_path, MYF(MY_WME)))
-    return 1;
+/*
+  rename view
 
-  /* check if arc_dir exists */
-  strxnmov(arc_path, FN_REFLEN, mysql_data_home, "/", schema, "/arc", NullS);
-  (void) unpack_filename(arc_path, arc_path);
+  Synopsis:
+    renames a view
 
-  if (revision && !access(arc_path, F_OK))
-  {
-    while (revision) {
-      my_snprintf(old_path, FN_REFLEN, "%s/%s%s-%04lu",
-		  arc_path, old_name, reg_ext, (ulong)revision);
-      (void) unpack_filename(old_path, old_path);
-      my_snprintf(new_path, FN_REFLEN, "%s/%s%s-%04lu",
-		  arc_path, new_name, reg_ext, (ulong)revision);
-      (void) unpack_filename(new_path, new_path);
-      if (my_rename(old_path, new_path, MYF(0)))
-        return 0;
-      revision--;
-    }
-  }
-  return 0;
-}
+  Parameters:
+    thd        thread handler
+    new_name   new name of view
+    view       view
 
+  Return values:
+    FALSE      Ok 
+    TRUE       Error
+*/
 bool
 mysql_rename_view(THD *thd,
 		   const char *new_name,
@@ -1438,7 +1416,8 @@ mysql_rename_view(THD *thd,
       DBUG_RETURN(1);
 
     /* rename view and it's backups */
-    if (rename_view_files(view->db, view->table_name, new_name, view->revision - 1))
+    if (rename_in_schema_file(view->db, view->table_name, new_name, 
+                              view->revision - 1, num_view_backups))
       DBUG_RETURN(1);
 
     strxnmov(dir_buff, FN_REFLEN, mysql_data_home, "/", view->db, "/", NullS);
@@ -1454,7 +1433,8 @@ mysql_rename_view(THD *thd,
     if (sql_create_definition_file(&pathstr, &file, view_file_type,
       (gptr)view, view_parameters, num_view_backups)) {
       /* restore renamed view in case of error */
-      rename_view_files(view->db, new_name, view->table_name, view->revision - 1);
+      rename_in_schema_file(view->db, new_name, view->table_name, 
+                             view->revision - 1, num_view_backups);
       DBUG_RETURN(1);
     }
   } else