Enabled usage of new system variables for ndb

  - ndb_use_exact_count
  - ndb_autoincrement_prefetch_sz
  - ndb_use_transactions
  - ndb_force_send
moved "inlined" functions to .cc file since they are virtual anyways
enabled printout od ndb errors in warnings even if mapping existst to mysql error code

sql/ha_ndbcluster.cc

@@ -39,9 +39,6 @@ static const int parallelism= 240;
 // createable against NDB from this handler
 static const int max_transactions= 256;
 
-// Default value for prefetch of autoincrement values
-static const ha_rows autoincrement_prefetch= 32;
-
 // connectstring to cluster if given by mysqld
 const char *ndbcluster_connectstring= 0;
 
@@ -103,58 +100,52 @@ struct err_code_mapping
 {
   int ndb_err;
   int my_err;
+  int show_warning;
 };
 
 static const err_code_mapping err_map[]= 
 {
-  { 626, HA_ERR_KEY_NOT_FOUND },
-  { 630, HA_ERR_FOUND_DUPP_KEY },
-  { 893, HA_ERR_FOUND_DUPP_UNIQUE },
-  { 721, HA_ERR_TABLE_EXIST },
-  { 4244, HA_ERR_TABLE_EXIST },
-
-  { 709, HA_ERR_NO_SUCH_TABLE },
-  { 284, HA_ERR_NO_SUCH_TABLE },
-
-  { 266, HA_ERR_LOCK_WAIT_TIMEOUT },
-  { 274, HA_ERR_LOCK_WAIT_TIMEOUT },
-  { 296, HA_ERR_LOCK_WAIT_TIMEOUT },
-  { 297, HA_ERR_LOCK_WAIT_TIMEOUT },
-  { 237, HA_ERR_LOCK_WAIT_TIMEOUT },
-
-  { 623, HA_ERR_RECORD_FILE_FULL },
-  { 624, HA_ERR_RECORD_FILE_FULL },
-  { 625, HA_ERR_RECORD_FILE_FULL },
-  { 826, HA_ERR_RECORD_FILE_FULL },
-  { 827, HA_ERR_RECORD_FILE_FULL },
-  { 832, HA_ERR_RECORD_FILE_FULL },
-
-  { 0, 1 },
-
-  { -1, -1 }
+  { 626, HA_ERR_KEY_NOT_FOUND, 0 },
+  { 630, HA_ERR_FOUND_DUPP_KEY, 0 },
+  { 893, HA_ERR_FOUND_DUPP_UNIQUE, 0 },
+  { 721, HA_ERR_TABLE_EXIST, 1 },
+  { 4244, HA_ERR_TABLE_EXIST, 1 },
+
+  { 709, HA_ERR_NO_SUCH_TABLE, 1 },
+  { 284, HA_ERR_NO_SUCH_TABLE, 1 },
+
+  { 266, HA_ERR_LOCK_WAIT_TIMEOUT, 1 },
+  { 274, HA_ERR_LOCK_WAIT_TIMEOUT, 1 },
+  { 296, HA_ERR_LOCK_WAIT_TIMEOUT, 1 },
+  { 297, HA_ERR_LOCK_WAIT_TIMEOUT, 1 },
+  { 237, HA_ERR_LOCK_WAIT_TIMEOUT, 1 },
+
+  { 623, HA_ERR_RECORD_FILE_FULL, 1 },
+  { 624, HA_ERR_RECORD_FILE_FULL, 1 },
+  { 625, HA_ERR_RECORD_FILE_FULL, 1 },
+  { 826, HA_ERR_RECORD_FILE_FULL, 1 },
+  { 827, HA_ERR_RECORD_FILE_FULL, 1 },
+  { 832, HA_ERR_RECORD_FILE_FULL, 1 },
+
+  { 0, 1, 0 },
+
+  { -1, -1, 1 }
 };
 
 
 static int ndb_to_mysql_error(const NdbError *err)
 {
   uint i;
-  for (i=0 ; err_map[i].ndb_err != err->code ; i++)
+  for (i=0; err_map[i].ndb_err != err->code && err_map[i].my_err != -1; i++);
+  if (err_map[i].show_warning)
   {
-    if (err_map[i].my_err == -1){
     // Push the NDB error message as warning
     push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
 			ER_GET_ERRMSG, ER(ER_GET_ERRMSG),
 			err->code, err->message, "NDB");
-      return err->code;
-    }
   }
-  // Push the NDB error message as warning
-  // this since e.g. HA_ERR_RECORD_FILE_FULL maps to
-  // several error codes in NDB, and the uses needs
-  // to know which one it is
-  push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
-		      ER_GET_ERRMSG, ER(ER_GET_ERRMSG),
-		      err->code, err->message, "NDB");
+  if (err_map[i].my_err == -1)
+    return err->code;
   return err_map[i].my_err;
 }
 
@@ -168,7 +159,7 @@ int execute_no_commit(ha_ndbcluster *h, NdbConnection *trans)
   if (m_batch_execute)
     return 0;
 #endif
-  return trans->execute(NoCommit,AbortOnError,1);
+  return trans->execute(NoCommit,AbortOnError,h->m_force_send);
 }
 
 inline
@@ -179,7 +170,18 @@ int execute_commit(ha_ndbcluster *h, NdbConnection *trans)
   if (m_batch_execute)
     return 0;
 #endif
-  return trans->execute(Commit,AbortOnError,1);
+  return trans->execute(Commit,AbortOnError,h->m_force_send);
+}
+
+inline
+int execute_commit(THD *thd, NdbConnection *trans)
+{
+  int m_batch_execute= 0;
+#ifdef NOT_USED
+  if (m_batch_execute)
+    return 0;
+#endif
+  return trans->execute(Commit,AbortOnError,thd->variables.ndb_force_send);
 }
 
 inline
@@ -190,7 +192,7 @@ int execute_no_commit_ie(ha_ndbcluster *h, NdbConnection *trans)
   if (m_batch_execute)
     return 0;
 #endif
-  return trans->execute(NoCommit,IgnoreError,1);
+  return trans->execute(NoCommit,IgnoreError,h->m_force_send);
 }
 
 /*
@@ -233,6 +235,8 @@ void ha_ndbcluster::set_rec_per_key()
 
 void ha_ndbcluster::records_update()
 {
+  if (m_ha_not_exact_count)
+    return;
   DBUG_ENTER("ha_ndbcluster::records_update");
   struct Ndb_table_local_info *info= (struct Ndb_table_local_info *)m_table_info;
   DBUG_PRINT("info", ("id=%d, no_uncommitted_rows_count=%d",
@@ -256,6 +260,8 @@ void ha_ndbcluster::records_update()
 
 void ha_ndbcluster::no_uncommitted_rows_execute_failure()
 {
+  if (m_ha_not_exact_count)
+    return;
   DBUG_ENTER("ha_ndbcluster::no_uncommitted_rows_execute_failure");
   THD *thd= current_thd;
   ((Thd_ndb*)(thd->transaction.thd_ndb))->error= 1;
@@ -264,6 +270,8 @@ void ha_ndbcluster::no_uncommitted_rows_execute_failure()
 
 void ha_ndbcluster::no_uncommitted_rows_init(THD *thd)
 {
+  if (m_ha_not_exact_count)
+    return;
   DBUG_ENTER("ha_ndbcluster::no_uncommitted_rows_init");
   struct Ndb_table_local_info *info= (struct Ndb_table_local_info *)m_table_info;
   Thd_ndb *thd_ndb= (Thd_ndb *)thd->transaction.thd_ndb;
@@ -281,6 +289,8 @@ void ha_ndbcluster::no_uncommitted_rows_init(THD *thd)
 
 void ha_ndbcluster::no_uncommitted_rows_update(int c)
 {
+  if (m_ha_not_exact_count)
+    return;
   DBUG_ENTER("ha_ndbcluster::no_uncommitted_rows_update");
   struct Ndb_table_local_info *info=
     (struct Ndb_table_local_info *)m_table_info;
@@ -293,6 +303,8 @@ void ha_ndbcluster::no_uncommitted_rows_update(int c)
 
 void ha_ndbcluster::no_uncommitted_rows_reset(THD *thd)
 {
+  if (m_ha_not_exact_count)
+    return;
   DBUG_ENTER("ha_ndbcluster::no_uncommitted_rows_reset");
   ((Thd_ndb*)(thd->transaction.thd_ndb))->count++;
   ((Thd_ndb*)(thd->transaction.thd_ndb))->error= 0;
@@ -1229,7 +1241,8 @@ inline int ha_ndbcluster::next_result(byte *buf)
       DBUG_PRINT("info", ("ops_pending: %d", m_ops_pending));    
       if (m_ops_pending)
       {
-	if (current_thd->transaction.on)
+	//	if (current_thd->transaction.on)
+	if (m_transaction_on)
 	{
 	  if (execute_no_commit(this,trans) != 0)
 	    DBUG_RETURN(ndb_err(trans));
@@ -1715,7 +1728,8 @@ int ha_ndbcluster::write_row(byte *record)
 			(int)m_rows_inserted, (int)m_bulk_insert_rows));
 
     m_bulk_insert_not_flushed= FALSE;
-    if (thd->transaction.on)
+    //    if (thd->transaction.on)
+    if (m_transaction_on)
     {
       if (execute_no_commit(this,trans) != 0)
       {
@@ -1888,7 +1902,7 @@ int ha_ndbcluster::update_row(const byte *old_data, byte *new_data)
   for (i= 0; i < table->fields; i++) 
   {
     Field *field= table->field[i];
-    if ((thd->query_id == field->query_id) &&
+    if (((thd->query_id == field->query_id) || m_retrieve_all_fields) &&
         (!(field->flags & PRI_KEY_FLAG)) &&
 	set_ndb_value(op, field, i))
       ERR_RETURN(op->getNdbError());
@@ -2547,16 +2561,19 @@ void ha_ndbcluster::info(uint flag)
     DBUG_PRINT("info", ("HA_STATUS_VARIABLE"));
     if (m_table_info)
     {
+      if (m_ha_not_exact_count)
+	records= 100;
+      else
 	records_update();
     }
     else
     {
-      Uint64 rows;
-      if(ndb_get_table_statistics(m_ndb, m_tabname, &rows, 0) == 0){
+      Uint64 rows= 100;
+      if (current_thd->variables.ndb_use_exact_count)
+	ndb_get_table_statistics(m_ndb, m_tabname, &rows, 0);
       records= rows;
     }
   }
-  }
   if (flag & HA_STATUS_CONST)
   {
     DBUG_PRINT("info", ("HA_STATUS_CONST"));
@@ -2943,6 +2960,15 @@ int ha_ndbcluster::external_lock(THD *thd, int lock_type)
       pointer to point to the NDB transaction. 
      */
 
+    // store thread specific data first to set the right context
+    m_force_send=          thd->variables.ndb_force_send;
+    m_ha_not_exact_count= !thd->variables.ndb_use_exact_count;
+    m_autoincrement_prefetch= thd->variables.ndb_autoincrement_prefetch_sz;
+    if (!thd->transaction.on)
+      m_transaction_on= FALSE;
+    else
+      m_transaction_on= thd->variables.ndb_use_transactions;
+
     m_active_trans= thd->transaction.all.ndb_tid ? 
       (NdbConnection*)thd->transaction.all.ndb_tid:
       (NdbConnection*)thd->transaction.stmt.ndb_tid;
@@ -3063,7 +3089,7 @@ int ndbcluster_commit(THD *thd, void *ndb_transaction)
                             "stmt" : "all"));
   DBUG_ASSERT(ndb && trans);
 
-  if (execute_commit(0,trans) != 0)
+  if (execute_commit(thd,trans) != 0)
   {
     const NdbError err= trans->getNdbError();
     const NdbOperation *error_op= trans->getNdbErrorOperation();
@@ -3617,11 +3643,11 @@ longlong ha_ndbcluster::get_auto_increment()
   DBUG_ENTER("get_auto_increment");
   DBUG_PRINT("enter", ("m_tabname: %s", m_tabname));
   int cache_size= 
-    (m_rows_to_insert - m_rows_inserted < autoincrement_prefetch) ?
+    (m_rows_to_insert - m_rows_inserted < m_autoincrement_prefetch) ?
     m_rows_to_insert - m_rows_inserted 
-    : (m_rows_to_insert > autoincrement_prefetch) ? 
+    : (m_rows_to_insert > m_autoincrement_prefetch) ? 
     m_rows_to_insert 
-    : autoincrement_prefetch;
+    : m_autoincrement_prefetch;
   Uint64 auto_value= 
     (m_skip_auto_increment) ? 
     m_ndb->readAutoIncrementValue((const NDBTAB *) m_table)
@@ -3659,7 +3685,11 @@ ha_ndbcluster::ha_ndbcluster(TABLE *table_arg):
   m_blobs_pending(0),
   m_blobs_buffer(0),
   m_blobs_buffer_size(0),
-  m_dupkey((uint) -1)
+  m_dupkey((uint) -1),
+  m_ha_not_exact_count(FALSE),
+  m_force_send(TRUE),
+  m_autoincrement_prefetch(32),
+  m_transaction_on(TRUE)
 { 
   int i;
   
@@ -4309,6 +4339,62 @@ ha_ndbcluster::records_in_range(uint inx, key_range *min_key,
   DBUG_RETURN(10); /* Good guess when you don't know anything */
 }
 
+ulong ha_ndbcluster::table_flags(void) const
+{
+  if (m_ha_not_exact_count)
+    return m_table_flags | HA_NOT_EXACT_COUNT;
+  else
+    return m_table_flags;
+}
+const char * ha_ndbcluster::table_type() const 
+{
+  return("ndbcluster");
+}
+uint ha_ndbcluster::max_supported_record_length() const
+{ 
+  return NDB_MAX_TUPLE_SIZE;
+}
+uint ha_ndbcluster::max_supported_keys() const
+{
+  return MAX_KEY;
+}
+uint ha_ndbcluster::max_supported_key_parts() const 
+{
+  return NDB_MAX_NO_OF_ATTRIBUTES_IN_KEY;
+}
+uint ha_ndbcluster::max_supported_key_length() const
+{
+  return NDB_MAX_KEY_SIZE;
+}
+bool ha_ndbcluster::low_byte_first() const
+{ 
+#ifdef WORDS_BIGENDIAN
+  return FALSE;
+#else
+  return TRUE;
+#endif
+}
+bool ha_ndbcluster::has_transactions()
+{
+  return TRUE;
+}
+const char* ha_ndbcluster::index_type(uint key_number)
+{
+  switch (get_index_type(key_number)) {
+  case ORDERED_INDEX:
+  case UNIQUE_ORDERED_INDEX:
+  case PRIMARY_KEY_ORDERED_INDEX:
+    return "BTREE";
+  case UNIQUE_INDEX:
+  case PRIMARY_KEY_INDEX:
+  default:
+    return "HASH";
+  }
+}
+uint8 ha_ndbcluster::table_cache_type()
+{
+  return HA_CACHE_TBL_NOCACHE;
+}
 
 /*
   Handling the shared NDB_SHARE structure that is needed to 

sql/ha_ndbcluster.h

@@ -118,15 +118,14 @@ class ha_ndbcluster: public handler
   int reset();
   int external_lock(THD *thd, int lock_type);
   int start_stmt(THD *thd);
-  const char * table_type() const { return("ndbcluster");}
+  const char * table_type() const;
   const char ** bas_ext() const;
-  ulong table_flags(void) const { return m_table_flags; }
+  ulong table_flags(void) const;
   ulong index_flags(uint idx, uint part, bool all_parts) const;
-  uint max_supported_record_length() const { return NDB_MAX_TUPLE_SIZE; };
-  uint max_supported_keys() const { return MAX_KEY;  }
-  uint max_supported_key_parts() const 
-    { return NDB_MAX_NO_OF_ATTRIBUTES_IN_KEY; };
-  uint max_supported_key_length() const { return NDB_MAX_KEY_SIZE;};
+  uint max_supported_record_length() const;
+  uint max_supported_keys() const;
+  uint max_supported_key_parts() const;
+  uint max_supported_key_length() const;
 
   int rename_table(const char *from, const char *to);
   int delete_table(const char *name);
@@ -135,28 +134,9 @@ class ha_ndbcluster: public handler
 			     THR_LOCK_DATA **to,
 			     enum thr_lock_type lock_type);
 
-  bool low_byte_first() const
-    { 
-#ifdef WORDS_BIGENDIAN
-      return FALSE;
-#else
-      return TRUE;
-#endif
-    }
-  bool has_transactions()  { return TRUE; }
-
-  const char* index_type(uint key_number) {
-    switch (get_index_type(key_number)) {
-    case ORDERED_INDEX:
-    case UNIQUE_ORDERED_INDEX:
-    case PRIMARY_KEY_ORDERED_INDEX:
-      return "BTREE";
-    case UNIQUE_INDEX:
-    case PRIMARY_KEY_INDEX:
-    default:
-      return "HASH";
-    }
-  }
+  bool low_byte_first() const;
+  bool has_transactions();
+  const char* index_type(uint key_number);
 
   double scan_time();
   ha_rows records_in_range(uint inx, key_range *min_key, key_range *max_key);
@@ -165,7 +145,7 @@ class ha_ndbcluster: public handler
 
   static Thd_ndb* seize_thd_ndb();
   static void release_thd_ndb(Thd_ndb* thd_ndb);
-  uint8 table_cache_type() { return HA_CACHE_TBL_NOCACHE; }
+  uint8 table_cache_type();
     
  private:
   int alter_table_name(const char *from, const char *to);
@@ -256,6 +236,10 @@ class ha_ndbcluster: public handler
   char *m_blobs_buffer;
   uint32 m_blobs_buffer_size;
   uint m_dupkey;
+  bool m_ha_not_exact_count;
+  bool m_force_send;
+  ha_rows m_autoincrement_prefetch;
+  bool m_transaction_on;
 
   void set_rec_per_key();
   void records_update();
@@ -265,6 +249,8 @@ class ha_ndbcluster: public handler
   void no_uncommitted_rows_reset(THD *);
 
   friend int execute_no_commit(ha_ndbcluster*, NdbConnection*);
+  friend int execute_commit(ha_ndbcluster*, NdbConnection*);
+  friend int execute_no_commit_ie(ha_ndbcluster*, NdbConnection*);
 };
 
 bool ndbcluster_init(void);

sql/mysqld.cc

@@ -3947,7 +3947,11 @@ enum options_mysqld
   OPT_INNODB_FILE_PER_TABLE, OPT_CRASH_BINLOG_INNODB,
   OPT_INNODB_LOCKS_UNSAFE_FOR_BINLOG,
   OPT_SAFE_SHOW_DB, OPT_INNODB_SAFE_BINLOG,
-  OPT_INNODB, OPT_ISAM, OPT_NDBCLUSTER, OPT_NDB_CONNECTSTRING, OPT_SKIP_SAFEMALLOC,
+  OPT_INNODB, OPT_ISAM,
+  OPT_NDBCLUSTER, OPT_NDB_CONNECTSTRING, OPT_NDB_USE_EXACT_COUNT,
+  OPT_NDB_FORCE_SEND, OPT_NDB_AUTOINCREMENT_PREFETCH_SZ,
+  OPT_NDB_USE_TRANSACTIONS,
+  OPT_SKIP_SAFEMALLOC,
   OPT_TEMP_POOL, OPT_TX_ISOLATION,
   OPT_SKIP_STACK_TRACE, OPT_SKIP_SYMLINKS,
   OPT_MAX_BINLOG_DUMP_EVENTS, OPT_SPORADIC_BINLOG_DUMP_FAIL,
@@ -4386,9 +4390,31 @@ Disable with --skip-ndbcluster (will save memory).",
    (gptr*) &opt_ndbcluster, (gptr*) &opt_ndbcluster, 0, GET_BOOL, NO_ARG, 1, 0, 0,
    0, 0, 0},
 #ifdef HAVE_NDBCLUSTER_DB
-  {"ndb-connectstring", OPT_NDB_CONNECTSTRING, "Connect string for ndbcluster.",
-   (gptr*) &ndbcluster_connectstring, (gptr*) &ndbcluster_connectstring, 0, GET_STR,
-   REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
+  {"ndb-connectstring", OPT_NDB_CONNECTSTRING,
+   "Connect string for ndbcluster.",
+   (gptr*) &ndbcluster_connectstring, (gptr*) &ndbcluster_connectstring,
+   0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
+  {"ndb_autoincrement_prefetch_sz", OPT_NDB_AUTOINCREMENT_PREFETCH_SZ,
+   "Specify number of autoincrement values that are prefetched",
+   (gptr*) &global_system_variables.ndb_autoincrement_prefetch_sz,
+   (gptr*) &global_system_variables.ndb_autoincrement_prefetch_sz,
+   0, GET_INT, REQUIRED_ARG, 32, 1, 256, 0, 0, 0},
+  {"ndb_force_send", OPT_NDB_FORCE_SEND,
+   "Force send of buffers to ndb immediately without waiting for other threads",
+   (gptr*) &global_system_variables.ndb_force_send,
+   (gptr*) &global_system_variables.ndb_force_send,
+   0, GET_BOOL, OPT_ARG, 1, 0, 0, 0, 0, 0},
+  {"ndb_use_exact_count", OPT_NDB_USE_EXACT_COUNT,
+   "Use exact records count during query planning and for "
+   "fast select count(*)",
+   (gptr*) &global_system_variables.ndb_use_exact_count,
+   (gptr*) &global_system_variables.ndb_use_exact_count,
+   0, GET_BOOL, OPT_ARG, 1, 0, 0, 0, 0, 0},
+  {"ndb_use_transactions", OPT_NDB_USE_TRANSACTIONS,
+   "Use transactions in ndb",
+   (gptr*) &global_system_variables.ndb_use_transactions,
+   (gptr*) &global_system_variables.ndb_use_transactions,
+   0, GET_BOOL, OPT_ARG, 1, 0, 0, 0, 0, 0},
 #endif
   {"new", 'n', "Use very new possible 'unsafe' functions.",
    (gptr*) &global_system_variables.new_mode,

sql/set_var.cc

@@ -359,6 +359,23 @@ sys_var_thd_bool	sys_innodb_table_locks("innodb_table_locks",
 sys_var_long_ptr	sys_innodb_autoextend_increment("innodb_autoextend_increment",
 							&srv_auto_extend_increment);
 #endif
+#ifdef HAVE_NDBCLUSTER_DB
+// ndb thread specific variable settings
+sys_var_thd_ulong 
+sys_ndb_autoincrement_prefetch_sz("ndb_autoincrement_prefetch_sz",
+				  &SV::ndb_autoincrement_prefetch_sz);
+sys_var_thd_bool
+sys_ndb_force_send("ndb_force_send",
+		   &SV::ndb_force_send);
+sys_var_thd_bool
+sys_ndb_use_exact_count("ndb_use_exact_count",
+			&SV::ndb_use_exact_count);
+sys_var_thd_bool
+sys_ndb_use_transactions("ndb_use_transactions",
+			 &SV::ndb_use_transactions);
+// ndb server global variable settings
+// none
+#endif
 
 /* Time/date/datetime formats */
 
@@ -612,6 +629,12 @@ sys_var *sys_variables[]=
   &sys_innodb_table_locks,
   &sys_innodb_max_purge_lag,
   &sys_innodb_autoextend_increment,
+#endif  
+#ifdef HAVE_NDBCLUSTER_DB
+  &sys_ndb_autoincrement_prefetch_sz,
+  &sys_ndb_force_send,
+  &sys_ndb_use_exact_count,
+  &sys_ndb_use_transactions,
 #endif
   &sys_unique_checks,
   &sys_warning_count
@@ -772,6 +795,13 @@ struct show_var_st init_vars[]= {
   {sys_myisam_sort_buffer_size.name, (char*) &sys_myisam_sort_buffer_size, SHOW_SYS},
 #ifdef __NT__
   {"named_pipe",	      (char*) &opt_enable_named_pipe,       SHOW_MY_BOOL},
+#endif
+#ifdef HAVE_NDBCLUSTER_DB
+  {sys_ndb_autoincrement_prefetch_sz.name,
+   (char*) &sys_ndb_autoincrement_prefetch_sz,                      SHOW_SYS},
+  {sys_ndb_force_send.name,   (char*) &sys_ndb_force_send,          SHOW_SYS},
+  {sys_ndb_use_exact_count.name,(char*) &sys_ndb_use_exact_count,   SHOW_SYS},
+  {sys_ndb_use_transactions.name,(char*) &sys_ndb_use_transactions, SHOW_SYS},
 #endif
   {sys_net_buffer_length.name,(char*) &sys_net_buffer_length,       SHOW_SYS},
   {sys_net_read_timeout.name, (char*) &sys_net_read_timeout,        SHOW_SYS},

sql/sql_class.h

@@ -399,6 +399,12 @@ struct system_variables
 #ifdef HAVE_INNOBASE_DB
   my_bool innodb_table_locks;
 #endif /* HAVE_INNOBASE_DB */
+#ifdef HAVE_NDBCLUSTER_DB
+  ulong ndb_autoincrement_prefetch_sz;
+  my_bool ndb_force_send;
+  my_bool ndb_use_exact_count;
+  my_bool ndb_use_transactions;
+#endif /* HAVE_NDBCLUSTER_DB */
   my_bool old_passwords;
   
   /* Only charset part of these variables is sensible */