support of join view updateability (WL#1809)

include/mysqld_error.h:
  new error mesaages
mysql-test/r/view.result:
  tests of updatint/inserting join views
mysql-test/t/view.test:
  tests of updatint/inserting join views
sql/mysql_priv.h:
  support of "usual UPDATE" -> "multi UPDATE" conversion
sql/share/czech/errmsg.txt:
  new error mesaages
sql/share/danish/errmsg.txt:
  new error mesaages
sql/share/dutch/errmsg.txt:
  new error mesaages
sql/share/english/errmsg.txt:
  new error mesaages
sql/share/estonian/errmsg.txt:
  new error mesaages
sql/share/french/errmsg.txt:
  new error mesaages
sql/share/german/errmsg.txt:
  new error mesaages
sql/share/greek/errmsg.txt:
  new error mesaages
sql/share/hungarian/errmsg.txt:
  new error mesaages
sql/share/italian/errmsg.txt:
  new error mesaages
sql/share/japanese/errmsg.txt:
  new error mesaages
sql/share/korean/errmsg.txt:
  new error mesaages
sql/share/norwegian-ny/errmsg.txt:
  new error mesaages
sql/share/norwegian/errmsg.txt:
  new error mesaages
sql/share/polish/errmsg.txt:
  new error mesaages
sql/share/portuguese/errmsg.txt:
  new error mesaages
sql/share/romanian/errmsg.txt:
  new error mesaages
sql/share/russian/errmsg.txt:
  new error mesaages
sql/share/serbian/errmsg.txt:
  new error mesaages
sql/share/slovak/errmsg.txt:
  new error mesaages
sql/share/spanish/errmsg.txt:
  new error mesaages
sql/share/swedish/errmsg.txt:
  new error mesaages
sql/share/ukrainian/errmsg.txt:
  new error mesaages
sql/sql_base.cc:
  test to avoid join virew to be catched here
sql/sql_class.h:
  support of join views add to update
sql/sql_delete.cc:
  support of join views add to delete(error issue)
sql/sql_insert.cc:
  support of join views add to insert
  (order of some check changed, to allow find table which will be inserted in, when we will know which fields will be inserted)
  mechanism of calling setup_tables() only once fixed for INSERT SELECT
sql/sql_parse.cc:
  support of "usual UPDATE" -> "multi UPDATE" conversion
  mysql_insert_select_prepare now called in same environment for usual queries and PS preparing
  support of join views add to delete (error issue)
sql/sql_prepare.cc:
  support of "usual UPDATE" -> "multi UPDATE" conversion
  support of join views add to delete (error issue)
sql/sql_update.cc:
  support of join views add to update
sql/sql_view.cc:
  join views made updatable
sql/sql_view.h:
  insert_view_fields now can check some errors
sql/table.cc:
  methods to support recursive walk by tables tree
sql/table.h:
  methods to support recursive walk by tables tree

sql/sql_view.cc

@@ -465,23 +465,27 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
   if ((view->updatable_view= (can_be_merged &&
                               view->algorithm != VIEW_ALGORITHM_TMPTABLE)))
   {
-    if (thd->lex->select_lex.table_list.elements > 1)
-      view->updatable_view= 0;
-    else
+    // TODO: change here when we will support UNIONs
+    for (TABLE_LIST *tbl= (TABLE_LIST *)thd->lex->select_lex.table_list.first;
+	 tbl;
+	 tbl= tbl->next_local)
     {
-      // TODO: change here when we will support UNIONs
-      for (TABLE_LIST *tbl= (TABLE_LIST *)thd->lex->select_lex.table_list.first;
-           tbl;
-           tbl= tbl->next_local)
+      if (tbl->view && !tbl->updatable_view)
       {
-        if (tbl->view && !tbl->updatable_view)
-        {
-          view->updatable_view= 0;
-          break;
-        }
+	view->updatable_view= 0;
+	break;
+      }
+      for (TABLE_LIST *up= tbl; up; up= up->embedding)
+      {
+	if (up->outer_join)
+	{
+	  view->updatable_view= 0;
+	  goto loop_out;
+	}
       }
     }
   }
+loop_out:
   if (sql_create_definition_file(&dir, &file, view_file_type,
 				 (gptr)view, view_parameters, 3))
   {
@@ -701,9 +705,6 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
          old_lex->can_use_merged()) &&
         !old_lex->can_not_use_merged())
     {
-      /*
-        TODO: support multi tables substitutions
-      */
       /* lex should contain at least one table */
       DBUG_ASSERT(view_tables != 0);
 
@@ -736,7 +737,6 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
       /* multi table view */
       if (view_tables->next_local)
       {
-        table->updatable= 0;
         /* make nested join structure for view tables */
         NESTED_JOIN *nested_join;
         if (!(nested_join= table->nested_join=
@@ -919,14 +919,16 @@ bool check_key_in_view(THD *thd, TABLE_LIST *view)
   uint i, elements_in_view;
   DBUG_ENTER("check_key_in_view");
 
-  if (!view->view)
+  if (!view->view && !view->belong_to_view)
     DBUG_RETURN(FALSE); /* it is normal table */
   table= view->table;
+  if (view->belong_to_view)
+    view= view->belong_to_view;
   trans= view->field_translation;
   key_info_end= (key_info= table->key_info)+ table->keys;
 
   elements_in_view= view->view->select_lex.item_list.elements;
-  DBUG_ASSERT(view->table != 0 && view->field_translation != 0);
+  DBUG_ASSERT(table != 0 && view->field_translation != 0);
 
   /* Loop over all keys to see if a unique-not-null key is used */
   for (;key_info != key_info_end ; key_info++)
@@ -1002,21 +1004,30 @@ bool check_key_in_view(THD *thd, TABLE_LIST *view)
     insert_view_fields()
     list      list for insertion
     view      view for processing
+
+  RETURN
+    0  - OK
+    -1 - error (is not sent to cliet)
 */
 
-void insert_view_fields(List<Item> *list, TABLE_LIST *view)
+int insert_view_fields(List<Item> *list, TABLE_LIST *view)
 {
   uint elements_in_view= view->view->select_lex.item_list.elements;
   Field_translator *trans;
   DBUG_ENTER("insert_view_fields");
 
   if (!(trans= view->field_translation))
-    DBUG_VOID_RETURN;
+    DBUG_RETURN(0);
 
   for (uint i= 0; i < elements_in_view; i++)
   {
     if (trans[i].item->type() == Item::FIELD_ITEM)
       list->push_back(trans[i].item);
+    else
+    {
+      my_error(ER_NON_UPDATABLE_TABLE, MYF(0), view->alias, "INSERT");
+      DBUG_RETURN(-1);
+    }
   }
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(0);
 }