merged latest changes in 3.23

sql/slave.h:
  Auto merged
sql/slave.cc:
  Auto merged
Docs/manual.texi:
  merged
sql/sql_base.cc:
  merged
sql/sql_show.cc:
  merged

Docs/manual.texi

@@ -633,6 +633,7 @@ Examples of Common Queries
 * example-user-variables::      Using user variables
 * example-Foreign keys::        Using foreign keys
 * Searching on two keys::       
+* Calculating days::            
 
 Queries from Twin Project
 
@@ -16551,6 +16552,7 @@ mysql> select 2 > 2;
         -> 0
 @end example
 
+@cindex @code{NULL}, testing for null
 @findex <=> (Equal to)
 @item <=>
 Null safe equal:
@@ -16559,6 +16561,7 @@ mysql> select 1 <=> 1, NULL <=> NULL, 1 <=> NULL;
         -> 1 1 0
 @end example
 
+@cindex @code{NULL}, testing for null
 @findex IS NULL
 @findex IS NOT NULL
 @item IS NULL
@@ -16643,6 +16646,7 @@ mysql> select ISNULL(1/0);
 Note that a comparison of @code{NULL} values using @code{=} will always be
 false!
 
+@cindex @code{NULL}, testing for null
 @findex COALESCE()
 @item COALESCE(list)
 Returns first non-@code{NULL} element in list:
@@ -16860,6 +16864,7 @@ make string comparison even more flexible.
 @subsection Control Flow Functions
 
 @table @code
+@cindex @code{NULL}, testing for null
 @findex IFNULL()
 @item IFNULL(expr1,expr2)
 If @code{expr1} is not @code{NULL}, @code{IFNULL()} returns @code{expr1},
@@ -17136,10 +17141,13 @@ mysql> select SQRT(20);
 
 @findex PI()
 @item PI()
-Returns the value of PI:
+Returns the value of PI. The default shown number of decimals is 5, but
+@strong{MySQL} internally uses the full double precession for PI.
 @example
 mysql> select PI();
         -> 3.141593
+mysql> SELECT PI()+0.000000000000000000;
+        -> 3.141592653589793116
 @end example
 
 @findex COS()
@@ -19268,7 +19276,7 @@ The options work for all table types, if not otherwise indicated:
 @item @code{PACK_KEYS} @tab Set this to 1 if you want to have a smaller index. This usually makes updates slower and reads faster (MyISAM, ISAM).
 @item @code{PASSWORD} @tab Encrypt the @code{.frm} file with a password.  This option doesn't do anything in the standard @strong{MySQL} version.
 @item @code{DELAY_KEY_WRITE} @tab Set this to 1 if want to delay key table updates until the table is closed (MyISAM).
-@item @code{ROW_FORMAT} @tab Defines how the rows should be stored (for the future).
+@item @code{ROW_FORMAT} @tab Defines how the rows should be stored. Currently you can only use the DYNAMIC and STATIC options for MyISAM tables.
 @end multitable
 
 When you use a @code{MyISAM} table, @strong{MySQL} uses the product of
@@ -19461,9 +19469,8 @@ normally do @code{ALTER TABLE} that often this isn't that high on our TODO.
 
 @itemize @bullet
 @item
-To use @code{ALTER TABLE}, you need @strong{select}, @strong{insert},
-@strong{delete}, @strong{update}, @strong{create}, and @strong{drop}
-privileges on the table.
+To use @code{ALTER TABLE}, you need @strong{ALTER}, @strong{INSERT},
+and @strong{CREATE} privileges on the table.
 
 @item
 @code{IGNORE} is a @strong{MySQL} extension to ANSI SQL92.
@@ -19553,7 +19560,7 @@ assigns a default value, as described in
 @findex DROP INDEX
 @item
 @code{DROP INDEX} removes an index. This is a @strong{MySQL} extension to
-ANSI SQL92.
+ANSI SQL92. @xref{DROP INDEX}.
 
 @item
 If columns are dropped from a table, the columns are also removed from any
@@ -20527,6 +20534,8 @@ or  INSERT [LOW_PRIORITY | DELAYED] [IGNORE]
 or  INSERT [LOW_PRIORITY | DELAYED] [IGNORE]
         [INTO] tbl_name
         SET col_name=expression, col_name=expression, ...
+or  INSERT [LOW_PRIORITY] [IGNORE] [INTO] tbl_name
+        SELECT ...
 
 @end example
 
@@ -22289,8 +22298,8 @@ tables to use the slower key cache method to create the index.
 @strong{NOTE} that this parameter is given in megabytes!
 
 @item @code{myisam_max_sort_file_size}
-The maximum size of the temporary file @strong{MySQL} is allowed to create
-to while recreating the index (during @code{REPAIR}, @code{ALTER TABLE}
+The maximum size of the temporary file @strong{MySQL} is allowed to use
+while recreating the index (during @code{REPAIR}, @code{ALTER TABLE}
 or @code{LOAD DATA INFILE}.  If the file size would be bigger than this,
 the index will be created through the key cache (which is slower).
 @strong{NOTE} that this parameter is given in megabytes!
@@ -22605,8 +22614,23 @@ combination after it has found the first matching row.
 
 @item Not exists
 @strong{MySQL} was able to do a @code{LEFT JOIN} optimization on the
-query and will not examine more rows in this table for a row combination
-after it finds one row that matches the @code{LEFT JOIN} criteria.
+query and will not examine more rows in this table for the previous row
+combination after it finds one row that matches the @code{LEFT JOIN} criteria.
+
+Here is an example for this:
+
+@example
+SELECT * FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.id IS NULL;
+@end example
+
+Assume that @code{t2.id} is defined with @code{NOT NULL}.  In this case
+@strong{MySQL} will scan @code{t1} and look up the rows in @code{t2}
+through @code{t1.id}. If @strong{MySQL} finds a matching row in
+@code{t2}, it knows that @code{t2.id} can never be @code{NULL}, and will
+not scan through the rest of the rows in @code{t2} that has the same
+@code{id}.  In other words, for each row in @code{t1}, @strong{MySQL}
+only needs to do a single lookup in @code{t2}, independent of how many
+matching rows there are in @code{t2}.
 
 @item @code{range checked for each record (index map: #)}
 @strong{MySQL} didn't find a real good index to use. It will, instead, for
@@ -22863,6 +22887,9 @@ the @code{FROM} clause.
 @{DESCRIBE | DESC@} tbl_name @{col_name | wild@}
 @end example
 
+@code{DESCRIBE} is a shortcut for @code{SHOW COLUMNS FROM}.
+@xref{SHOW DATABASE INFO}.
+
 @code{DESCRIBE} provides information about a table's columns.  @code{col_name}
 may be a column name or a string containing the SQL @samp{%} and @samp{_}
 wild-card characters.
@@ -22954,6 +22981,18 @@ are locked by the current thread are automatically unlocked when the
 thread issues another @code{LOCK TABLES}, or when the connection to the
 server is closed.
 
+The main reasons to use @code{LOCK TABLES} are:
+
+@itemize @bullet
+@item
+Emulate transactions with not transaction safe tables.
+@item
+To get more speed with @code{MyISAM} tables when inserting/updating data
+over many statements. The main reason this gives more speed is that
+@strong{MySQL} will not flush the key cache for the locked tables until
+@code{UNLOCK TABLES} is called.
+@end itemize
+
 If a thread obtains a @code{READ} lock on a table, that thread (and all other
 threads) can only read from the table. If a thread obtains a @code{WRITE}
 lock on a table, then only the thread holding the lock can @code{READ} from
@@ -24519,7 +24558,7 @@ mysql> ALTER TABLE tbl_name TYPE = MYISAM;
 @end example
 
 @cindex tables, @code{HEAP}
-@node HEAP, BDB, ISAM, Table types
+@node HEAP, InnoDB, ISAM, Table types
 @section HEAP Tables
 
 @code{HEAP} tables use a hashed index and are stored in memory.  This
@@ -24596,7 +24635,7 @@ SUM_OVER_ALL_KEYS(max_length_of_key + sizeof(char*) * 2)
 
 @code{sizeof(char*)} is 4 on 32-bit machines and 8 on 64-bit machines.
 
-@node InnoDB,  , GEMINI, Table types
+@node InnoDB, BDB, HEAP, Table types
 @section InnoDB Tables
 
 @menu
@@ -25897,7 +25936,7 @@ Finland
 
 @cindex tables, @code{BDB}
 @cindex tables, @code{Berkeley DB}
-@node BDB, GEMINI, HEAP, Table types
+@node BDB, GEMINI, InnoDB, Table types
 @section BDB or Berkeley_DB Tables
 
 @menu
@@ -26183,7 +26222,7 @@ not trivial).
 @end itemize
 
 @cindex GEMINI tables
-@node GEMINI, InnoDB, BDB, Table types
+@node GEMINI,  , BDB, Table types
 @section GEMINI Tables
 
 @cindex GEMINI tables, overview
@@ -28800,6 +28839,7 @@ mysql> SELECT * FROM shop;
 * example-user-variables::      Using user variables
 * example-Foreign keys::        Using foreign keys
 * Searching on two keys::       
+* Calculating days::            
 @end menu
 
 @node example-Maximum-column, example-Maximum-row, Examples, Examples
@@ -29056,7 +29096,7 @@ SELECT s.* FROM persons p, shirts s
 @findex UNION
 @cindex searching, two keys
 @cindex keys, searching on two
-@node Searching on two keys,  , example-Foreign keys, Examples
+@node Searching on two keys, Calculating days, example-Foreign keys, Examples
 @subsection Searching on Two Keys
 
 @strong{MySQL} doesn't yet optimize when you search on two different
@@ -29088,6 +29128,35 @@ DROP TABLE tmp;
 
 The above way to solve this query is in effect an @code{UNION} of two queries.
 
+@cindex bit_functions, example
+@findex BIT_OR
+@findex BIT_COUNT
+@findex <<
+@node Calculating days,  , Searching on two keys, Examples
+@subsection Calculating visits per day
+
+The following shows an idea of how you can use the bit group functions
+to calculate the number of days per month a user has visited a web page.
+
+@example
+CREATE TABLE t1 (year YEAR(4), month INT(2) UNSIGNED ZEROFILL, day INT(2) UNSIGNED ZEROFILL);                                                            
+INSERT INTO t1 VALUES(2000,1,1),(2000,1,20),(2000,1,30),(2000,2,2),(2000,2,23),(2000,2,23);
+
+SELECT year,month,BIT_COUNT(BIT_OR(1<<day)) AS days FROM t1 GROUP BY year,month;
+
+Which returns:
+
++------+-------+------+
+| year | month | days |
++------+-------+------+
+| 2000 |    01 |    3 |
+| 2000 |    02 |    2 |
++------+-------+------+
+@end example
+
+The above calculates how many different days was used for a given
+year/month combination, with automatic removal of duplicate entries.
+
 @cindex modes, batch
 @cindex batch mode
 @cindex running, batch mode
@@ -30911,10 +30980,13 @@ unless you know what you are doing!
 @itemize
 
 @item
-Minimal length of word to be indexed is defined by @strong{MySQL}
-variable @code{ft_min_word_length}. @xref{SHOW VARIABLES}.
-Change it to the value you prefer, and rebuild
-your @code{FULLTEXT} indexes (e.g. with @code{OPTIMIZE TABLE}).
+Minimal length of word to be indexed is defined in
+@code{myisam/ftdefs.h} file by the line
+@example
+#define MIN_WORD_LEN 4
+@end example
+Change it to the value you prefer, recompile @strong{MySQL}, and rebuild
+your @code{FULLTEXT} indexes.
 
 @item
 The stopword list is defined in @code{myisam/ft_static.c}
@@ -30980,6 +31052,9 @@ index operations (querying/dumping/statistics).
 @itemize @bullet
 @item Make all operations with @code{FULLTEXT} index @strong{faster}.
 @item Support for braces @code{()} in boolean full-text search.
+@item Phrase search, proximity operators
+@item Boolean search can work without @code{FULLTEXT} index
+(yes, @strong{very} slow).
 @item Support for "always-index words". They could be any strings
 the user wants to treat as words, examples are "C++", "AS/400", "TCP/IP", etc.
 @item Support for full-text search in @code{MERGE} tables.
@@ -52004,7 +52079,19 @@ structure.
 Don't allow more than a defined number of threads to run MyISAM recover
 at the same time.
 @item
-Change @code{INSERT ... SELECT} to use concurrent inserts.
+Change @code{INSERT ... SELECT} to optionally use concurrent inserts.
+@item
+Implement @code{RENAME DATABASE}. To make this safe for all table handlers,
+it should work as follows:
+@itemize @bullet
+@item
+Create the new database.
+@item
+For every table do a rename of the table to another database, as
+we do with the @code{RENAME} command.
+@item
+Drop the old database.
+@end itemize
 @item
 Return the original field types() when doing @code{SELECT MIN(column)
 ... GROUP BY}.
@@ -52051,6 +52138,8 @@ a concurrent insert at the end of the file if the file is read-locked.
 @item
 Remember @code{FOREIGN} key definitions in the @file{.frm} file.
 @item
+Cascading @code{DELETE}
+@item
 Server side cursors.
 @item
 Check if @code{lockd} works with modern Linux kernels; If not, we have
@@ -52060,6 +52149,13 @@ give any errors if @code{lockd} works.
 @item
 Allow SQL variables in @code{LIMIT}, like in @code{LIMIT @@a,@@b}.
 @item
+Allow update of variables in @code{UPDATE} statements. For example:
+@code{UPDATE TABLE foo SET @@a=a+b,a=@@a, b=@@a+c}
+@item
+Change when user variables are updated so that one can use them with
+@code{GROUP BY}, as in the following example:
+@code{SELECT id, @@a:=count(*), sum(sum_col)/@@a FROM table_name GROUP BY id}.
+@item
 Don't add automatic @code{DEFAULT} values to columns.  Give an error when using
 an @code{INSERT} that doesn't contain a column that doesn't have a
 @code{DEFAULT}.
@@ -52198,9 +52294,6 @@ Change that @code{ALTER TABLE} doesn't abort clients that executes
 Fix that when columns referenced in an @code{UPDATE} clause contains the old
 values before the update started.
 @item
-Allow update of variables in @code{UPDATE} statements. For example:
-@code{UPDATE TABLE foo SET @@a=a+b,a=@@a, b=@@a+c}
-@item
 @code{myisamchk}, @code{REPAIR} and @code{OPTIMIZE TABLE} should be able
 to handle cases where the data and/or index files are symbolic links.
 @item

sql/slave.cc

@@ -27,7 +27,7 @@
 #define RPL_LOG_NAME (glob_mi.log_file_name[0] ? glob_mi.log_file_name :\
  "FIRST")
 
-bool slave_running = 0;
+volatile bool slave_running = 0;
 pthread_t slave_real_id;
 MASTER_INFO glob_mi;
 HASH replicate_do_table, replicate_ignore_table;

sql/slave.h

@@ -98,8 +98,7 @@ int init_master_info(MASTER_INFO* mi);
 void end_master_info(MASTER_INFO* mi);
 extern bool opt_log_slave_updates ;
 pthread_handler_decl(handle_slave,arg);
-extern bool volatile abort_loop, abort_slave;
-extern bool slave_running;
+extern bool volatile abort_loop, abort_slave, slave_running;
 extern uint32 slave_skip_counter;
 // needed for problems when slave stops and
 // we want to restart it skipping one or more events in the master log that

sql/sql_base.cc

@@ -34,6 +34,8 @@ HASH open_cache;				/* Used by mysql_test */
 
 static int open_unireg_entry(THD *thd,TABLE *entry,const char *db,
 			     const char *name, const char *alias, bool locked);
+static bool insert_fields(THD *thd,TABLE_LIST *tables, const char *db_name,
+			  const char *table_name, List_iterator<Item> *it);
 static void free_cache_entry(TABLE *entry);
 static void mysql_rm_tmp_tables(void);
 static key_map get_key_map_from_key_list(TABLE *table,
@@ -109,71 +111,75 @@ static void check_unused(void)
 #define check_unused()
 #endif
 
-OPEN_TABLE_LIST *list_open_tables(THD *thd, const char *wild)
+int list_open_tables(THD *thd,List<char> *tables, const char *db,
+		     const char *wild)
 {
   int result = 0;
   uint col_access=thd->col_access;
-  OPEN_TABLE_LIST **start_list, *open_list;
   TABLE_LIST table_list;
-  char name[NAME_LEN*2];
   DBUG_ENTER("list_open_tables");
-
   VOID(pthread_mutex_lock(&LOCK_open));
   bzero((char*) &table_list,sizeof(table_list));
-  start_list= &open_list;
-  open_list=0;
 
-  for (uint idx=0 ; result == 0 && idx < open_cache.records; idx++)
+  for (uint idx=0 ; idx < open_cache.records; idx++)
   {
-    OPEN_TABLE_LIST *table;
     TABLE *entry=(TABLE*) hash_element(&open_cache,idx);
-
-    if ((!entry->real_name))
-      continue;					// Shouldn't happen
-    if (wild)
+    if ((!entry->real_name) || strcmp(entry->table_cache_key,db))
+      continue;
+    if (wild && wild[0] && wild_compare(entry->real_name,wild))
+      continue;
+    if (db && !(col_access & TABLE_ACLS))
     {
-      strxmov(name,entry->table_cache_key,".",entry->real_name,NullS);
-      if (wild_compare(name,wild))
-	continue;
+      table_list.db= (char*) db;
+      table_list.real_name= entry->real_name;/*real name*/
+      table_list.grant.privilege=col_access;
+      if (check_grant(thd,TABLE_ACLS,&table_list,1))
+        continue;
     }
+    /* need to check if he have't already listed it */
 
-    /* Check if user has SELECT privilege for any column in the table */
-    table_list.db= (char*) entry->table_cache_key;
-    table_list.real_name= entry->real_name;
-    table_list.grant.privilege=0;
-    if (check_table_access(thd,SELECT_ACL | EXTRA_ACL,&table_list))
-      continue;
-
-    /* need to check if we haven't already listed it */
-    for (table= open_list  ; table ; table=table->next)
+    List_iterator<char> it(*tables);
+    char *table_name; 
+    int check = 0;
+    while (check == 0 && (table_name=it++))
     {
-      if (!strcmp(table->table,entry->real_name) &&
-	  !strcmp(table->db,entry->table_cache_key))
-      {
-	if (entry->in_use)
-	  table->in_use++;
-	if (entry->locked_by_name)
-	  table->locked++;
-	break;
-      }
+      if (!strcmp(table_name,entry->real_name))
+        check++;
     }
-    if (table)
+    if (check)
       continue;
-    if (!(*start_list = (OPEN_TABLE_LIST *)
-	  sql_alloc(sizeof(OPEN_TABLE_LIST)+entry->key_length)))
+    
+    if (tables->push_back(thd->strdup(entry->real_name)))
     {
-      open_list=0;				// Out of memory
+      result = -1;
       break;
     }
-    (*start_list)->table=(strmov((*start_list)->db=(char*) ((*start_list)+1),
-				 entry->table_cache_key)+1,
-			  entry->real_name);
-    (*start_list)->in_use= entry->in_use ? 1 : 0;
-    (*start_list)->locked= entry->locked_by_name ? 1 : 0;
-    start_list= &(*start_list)->next;
   }
+  
   VOID(pthread_mutex_unlock(&LOCK_open));
-  DBUG_RETURN(open_list);
+  DBUG_RETURN(result);  
+}
+
+char*
+query_table_status(THD *thd,const char *db,const char *table_name)
+{
+  int cached = 0, in_use = 0;
+  char info[256];
+
+  for (uint idx=0 ; idx < open_cache.records; idx++)
+  {
+    TABLE *entry=(TABLE*) hash_element(&open_cache,idx);
+    if (strcmp(entry->table_cache_key,db) ||
+        strcmp(entry->real_name,table_name))
+      continue;
+
+    cached++;
+    if (entry->in_use)
+      in_use++;
+  }
+
+  sprintf(info, "cached=%d, in_use=%d", cached, in_use);
+  return thd->strdup(info);
 }
 
 
@@ -253,7 +259,7 @@ send_fields(THD *thd,List<Item> &list,uint flag)
     if (my_net_write(&thd->net, (char*) packet->ptr(),packet->length()))
       break;					/* purecov: inspected */
   }
-  send_eof(&thd->net);
+  send_eof(&thd->net,(test_flags & TEST_MIT_THREAD) ? 0: 1);
   return 0;
  err:
   send_error(&thd->net,ER_OUT_OF_RESOURCES);	/* purecov: inspected */
@@ -424,9 +430,40 @@ void close_thread_tables(THD *thd, bool locked)
 
   DBUG_PRINT("info", ("thd->open_tables=%p", thd->open_tables));
 
-  while (thd->open_tables)
-    found_old_table|=close_thread_table(thd, &thd->open_tables);
-
+  for (table=thd->open_tables ; table ; table=next)
+  {
+    next=table->next;
+    if (table->version != refresh_version ||
+	thd->version != refresh_version || !table->db_stat)
+    {
+      VOID(hash_delete(&open_cache,(byte*) table));
+      found_old_table=1;
+    }
+    else
+    {
+      if (table->flush_version != flush_version)
+      {
+	table->flush_version=flush_version;
+	table->file->extra(HA_EXTRA_FLUSH);
+      }
+      else
+      {
+	// Free memory and reset for next loop
+	table->file->extra(HA_EXTRA_RESET);
+      }
+      table->in_use=0;
+      if (unused_tables)
+      {
+	table->next=unused_tables;		/* Link in last */
+	table->prev=unused_tables->prev;
+	unused_tables->prev=table;
+	table->prev->next=table;
+      }
+      else
+	unused_tables=table->next=table->prev=table;
+    }
+  }
+  thd->open_tables=0;
   /* Free tables to hold down open files */
   while (open_cache.records > table_cache_size && unused_tables)
     VOID(hash_delete(&open_cache,(byte*) unused_tables)); /* purecov: tested */
@@ -442,48 +479,6 @@ void close_thread_tables(THD *thd, bool locked)
   DBUG_VOID_RETURN;
 }
 
-/* move one table to free list */
-
-bool close_thread_table(THD *thd, TABLE **table_ptr)
-{
-  DBUG_ENTER("close_thread_table");
-
-  bool found_old_table=0;
-  TABLE *table=*table_ptr;
-
-  *table_ptr=table->next;
-  if (table->version != refresh_version ||
-      thd->version != refresh_version || !table->db_stat)
-  {
-    VOID(hash_delete(&open_cache,(byte*) table));
-    found_old_table=1;
-  }
-  else
-  {
-    if (table->flush_version != flush_version)
-    {
-      table->flush_version=flush_version;
-      table->file->extra(HA_EXTRA_FLUSH);
-    }
-    else
-    {
-      // Free memory and reset for next loop
-      table->file->extra(HA_EXTRA_RESET);
-    }
-    table->in_use=0;
-    if (unused_tables)
-    {
-      table->next=unused_tables;		/* Link in last */
-      table->prev=unused_tables->prev;
-      unused_tables->prev=table;
-      table->prev->next=table;
-    }
-    else
-      unused_tables=table->next=table->prev=table;
-  }
-  DBUG_RETURN(found_old_table);
-}
-
 	/* Close and delete temporary tables */
 
 void close_temporary(TABLE *table,bool delete_table)
@@ -1837,7 +1832,7 @@ static key_map get_key_map_from_key_list(TABLE *table,
 **	Returns pointer to last inserted field if ok
 ****************************************************************************/
 
-bool
+static bool
 insert_fields(THD *thd,TABLE_LIST *tables, const char *db_name,
 	      const char *table_name, List_iterator<Item> *it)
 {

sql/sql_show.cc

@@ -95,34 +95,38 @@ mysqld_show_dbs(THD *thd,const char *wild)
 ** List all open tables in a database
 ***************************************************************************/
 
-int mysqld_show_open_tables(THD *thd,const char *wild)
+int mysqld_show_open_tables(THD *thd,const char *db,const char *wild)
 {
+  Item_string *field=new Item_string("",0);
   List<Item> field_list;
-  OPEN_TABLE_LIST *open_list;
-  CONVERT *convert=thd->convert_set;
+  char *end,*table_name;
+  List<char> tables;
   DBUG_ENTER("mysqld_show_open_tables");
 
-  field_list.push_back(new Item_empty_string("Database",NAME_LEN));
-  field_list.push_back(new Item_empty_string("Table",NAME_LEN));
-  field_list.push_back(new Item_int("In_use",0, 4));
-  field_list.push_back(new Item_int("Name_locked",0, 4));
+  field->name=(char*) thd->alloc(20+(uint) strlen(db)+(wild ? (uint) strlen(wild)+4:0));
+  end=strxmov(field->name,"Open_tables_in_",db,NullS);
+  if (wild && wild[0])
+    strxmov(end," (",wild,")",NullS);
+  field->max_length=NAME_LEN;
+  field_list.push_back(field);
+  field_list.push_back(new Item_empty_string("Comment",80));
 
   if (send_fields(thd,field_list,1))
     DBUG_RETURN(1);
 
-  if (!(open_list=list_open_tables(thd,wild)))
+  if (list_open_tables(thd,&tables,db,wild))
     DBUG_RETURN(-1);
 
-  for ( ; open_list ; open_list=open_list->next)
+  List_iterator<char> it(tables);
+  while ((table_name=it++))
   {
     thd->packet.length(0);
-    net_store_data(&thd->packet,convert, open_list->db);
-    net_store_data(&thd->packet,convert, open_list->table);
-    net_store_data(&thd->packet,open_list->in_use);
-    net_store_data(&thd->packet,open_list->locked);
+    net_store_data(&thd->packet,table_name);
+    net_store_data(&thd->packet,query_table_status(thd,db,table_name));
     if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
       DBUG_RETURN(-1);
   }
+
   send_eof(&thd->net);
   DBUG_RETURN(0);
 }