Merge mskold@bk-internal.mysql.com:/home/bk/mysql-5.1-new-ndb_improved_on-line_discover

into  mysql.com:/usr/local/home/marty/MySQL/mysql-5.1-new-ndb_improved_on-line_discover


sql/ha_ndbcluster.cc:
  Auto merged
sql/ha_ndbcluster.h:
  Auto merged
storage/ndb/src/ndbapi/NdbDictionaryImpl.cpp:
  Auto merged
sql/ha_ndbcluster_binlog.cc:
  Merge

mysql-test/r/ndb_alter_table_row.result

@@ -3,10 +3,19 @@ create table t1 ( a int primary key, b varchar(10), c varchar(10), index (b) )
 engine=ndb;
 insert into t1 values (1,'one','one'), (2,'two','two'), (3,'three','three');
 create index c on t1(c);
+show indexes from t1;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+t1	0	PRIMARY	1	a	A	3	NULL	NULL		BTREE	
+t1	1	b	1	b	A	3	NULL	NULL	YES	BTREE	
+t1	1	c	1	c	A	3	NULL	NULL	YES	BTREE	
 select * from t1 where c = 'two';
 a	b	c
 2	two	two
 alter table t1 drop index c;
+show indexes from t1;
+Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
+t1	0	PRIMARY	1	a	A	3	NULL	NULL		BTREE	
+t1	1	b	1	b	A	3	NULL	NULL	YES	BTREE	
 select * from t1 where c = 'two';
 a	b	c
 2	two	two

mysql-test/t/ndb_alter_table_row.test

@@ -13,10 +13,12 @@ engine=ndb;
 insert into t1 values (1,'one','one'), (2,'two','two'), (3,'three','three');
 create index c on t1(c); 
 connection server2;
+show indexes from t1;
 select * from t1 where c = 'two';
 connection server1;
 alter table t1 drop index c;
 connection server2;
+show indexes from t1;
 select * from t1 where c = 'two';
 connection server1;
 drop table t1;

sql/ha_ndbcluster.cc

@@ -519,6 +519,7 @@ void ha_ndbcluster::invalidate_dictionary_cache(bool global)
   {
     NDBINDEX *index = (NDBINDEX *) m_index[i].index;
     NDBINDEX *unique_index = (NDBINDEX *) m_index[i].unique_index;
+    if (!index && !unique_index) continue;
     NDB_INDEX_TYPE idx_type= m_index[i].type;
 
     switch (idx_type) {
@@ -991,8 +992,8 @@ bool ha_ndbcluster::uses_blob_value()
     -2   Meta data has changed; Re-read data and try again
 */
 
-static int cmp_frm(const NDBTAB *ndbtab, const void *pack_data,
-                   uint pack_length)
+int cmp_frm(const NDBTAB *ndbtab, const void *pack_data,
+            uint pack_length)
 {
   DBUG_ENTER("cmp_frm");
   /*
@@ -1076,7 +1077,7 @@ int ha_ndbcluster::get_metadata(const char *path)
   m_table= (void *)tab; 
   m_table_info= NULL; // Set in external lock
   
-  DBUG_RETURN(open_indexes(ndb, table));
+  DBUG_RETURN(open_indexes(ndb, table, FALSE));
 }
 
 static int fix_unique_index_attr_order(NDB_INDEX_DATA &data,
@@ -1249,7 +1250,7 @@ int ha_ndbcluster::add_index_handle(THD *thd, NDBDICT *dict, KEY *key_info,
 /*
   Associate index handles for each index of a table
 */
-int ha_ndbcluster::open_indexes(Ndb *ndb, TABLE *tab)
+int ha_ndbcluster::open_indexes(Ndb *ndb, TABLE *tab, bool ignore_error)
 {
   uint i;
   int error= 0;
@@ -1263,7 +1264,10 @@ int ha_ndbcluster::open_indexes(Ndb *ndb, TABLE *tab)
   for (i= 0; i < tab->s->keys; i++, key_info++, key_name++)
   {
     if ((error= add_index_handle(thd, dict, key_info, *key_name, i)))
-      break;
+      if (ignore_error)
+        m_index[i].index= m_index[i].unique_index= NULL;
+      else
+        break;
   }
   
   DBUG_RETURN(error);
@@ -3739,7 +3743,7 @@ int ha_ndbcluster::external_lock(THD *thd, int lock_type)
       {
         m_table= (void *)tab;
         m_table_version = tab->getObjectVersion();
-        if (!(my_errno= open_indexes(ndb, table)))
+        if (!(my_errno= open_indexes(ndb, table, FALSE)))
           DBUG_RETURN(my_errno);
       }
       m_table_info= tab_info;

sql/ha_ndbcluster.h

@@ -691,6 +691,9 @@ static void set_tabname(const char *pathname, char *tabname);
 
 private:
   friend int ndbcluster_drop_database_impl(const char *path);
+  friend int ndb_handle_schema_change(THD *thd, 
+                                      Ndb *ndb, NdbEventOperation *pOp,
+                                      NDB_SHARE *share);
   int alter_table_name(const char *to);
   static int delete_table(ha_ndbcluster *h, Ndb *ndb,
 			  const char *path,
@@ -708,7 +711,7 @@ private:
   int create_indexes(Ndb *ndb, TABLE *tab);
   void clear_index(int i);
   void clear_indexes();
-  int open_indexes(Ndb *ndb, TABLE *tab);
+  int open_indexes(Ndb *ndb, TABLE *tab, bool ignore_error);
   void renumber_indexes(Ndb *ndb, TABLE *tab);
   int drop_indexes(Ndb *ndb, TABLE *tab);
   int add_index_handle(THD *thd, NdbDictionary::Dictionary *dict,

sql/ha_ndbcluster_binlog.cc

@@ -230,6 +230,72 @@ static void run_query(THD *thd, char *buf, char *end,
   }
 }
 
+int
+ndbcluster_binlog_open_table(THD *thd, NDB_SHARE *share,
+                             TABLE_SHARE *table_share, TABLE *table)
+{
+  int error;
+  MEM_ROOT *mem_root= &share->mem_root;
+  DBUG_ENTER("ndbcluster_binlog_open_table");
+  
+  init_tmp_table_share(table_share, share->db, 0, share->table_name, 
+                       share->key);
+  if ((error= open_table_def(thd, table_share, 0)))
+  {
+    sql_print_error("Unable to get table share for %s, error=%d",
+                    share->key, error);
+    DBUG_PRINT("error", ("open_table_def failed %d", error));
+    my_free((gptr) table_share, MYF(0));
+    table_share= 0;
+    my_free((gptr) table, MYF(0));
+    table= 0;
+    DBUG_RETURN(error);
+  }
+  if ((error= open_table_from_share(thd, table_share, "", 0, 
+                                    (uint) READ_ALL, 0, table, FALSE)))
+  {
+    sql_print_error("Unable to open table for %s, error=%d(%d)",
+                    share->key, error, my_errno);
+    DBUG_PRINT("error", ("open_table_from_share failed %d", error));
+    my_free((gptr) table_share, MYF(0));
+    table_share= 0;
+    my_free((gptr) table, MYF(0));
+    table= 0;
+    DBUG_RETURN(error);
+  }
+  assign_new_table_id(table);
+  if (!table->record[1] || table->record[1] == table->record[0])
+  {
+    table->record[1]= alloc_root(&table->mem_root,
+                                 table->s->rec_buff_length);
+  }
+  table->in_use= injector_thd;
+  
+  table->s->db.str= share->db;
+  table->s->db.length= strlen(share->db);
+  table->s->table_name.str= share->table_name;
+  table->s->table_name.length= strlen(share->table_name);
+  
+  share->table_share= table_share;
+  share->table= table;
+#ifndef DBUG_OFF
+  dbug_print_table("table", table);
+#endif
+  /*
+    ! do not touch the contents of the table
+    it may be in use by the injector thread
+  */
+  share->ndb_value[0]= (NdbValue*)
+    alloc_root(mem_root, sizeof(NdbValue) * table->s->fields
+               + 1 /*extra for hidden key*/);
+  share->ndb_value[1]= (NdbValue*)
+    alloc_root(mem_root, sizeof(NdbValue) * table->s->fields
+               +1 /*extra for hidden key*/);
+
+  DBUG_RETURN(0);
+}
+
+
 /*
   Initialize the binlog part of the NDB_SHARE
 */
@@ -280,64 +346,12 @@ void ndbcluster_binlog_init_share(NDB_SHARE *share, TABLE *_table)
   }
   while (1) 
   {
+    int error;
     TABLE_SHARE *table_share= 
       (TABLE_SHARE *) my_malloc(sizeof(*table_share), MYF(MY_WME));
     TABLE *table= (TABLE*) my_malloc(sizeof(*table), MYF(MY_WME));
-    int error;
-
-    init_tmp_table_share(table_share, share->db, 0, share->table_name, 
-                         share->key);
-    if ((error= open_table_def(thd, table_share, 0)))
-    {
-      sql_print_error("Unable to get table share for %s, error=%d",
-                      share->key, error);
-      DBUG_PRINT("error", ("open_table_def failed %d", error));
-      my_free((gptr) table_share, MYF(0));
-      table_share= 0;
-      my_free((gptr) table, MYF(0));
-      table= 0;
-      break;
-    }
-    if ((error= open_table_from_share(thd, table_share, "", 0, 
-                                      (uint) READ_ALL, 0, table, FALSE)))
-    {
-      sql_print_error("Unable to open table for %s, error=%d(%d)",
-                      share->key, error, my_errno);
-      DBUG_PRINT("error", ("open_table_from_share failed %d", error));
-      my_free((gptr) table_share, MYF(0));
-      table_share= 0;
-      my_free((gptr) table, MYF(0));
-      table= 0;
+    if ((error= ndbcluster_binlog_open_table(thd, share, table_share, table)))
       break;
-    }
-    assign_new_table_id(table);
-    if (!table->record[1] || table->record[1] == table->record[0])
-    {
-      table->record[1]= alloc_root(&table->mem_root,
-                                   table->s->rec_buff_length);
-    }
-    table->in_use= injector_thd;
-        
-    table->s->db.str= share->db;
-    table->s->db.length= strlen(share->db);
-    table->s->table_name.str= share->table_name;
-    table->s->table_name.length= strlen(share->table_name);
- 
-    share->table_share= table_share;
-    share->table= table;
-#ifndef DBUG_OFF
-    dbug_print_table("table", table);
-#endif
-    /*
-      ! do not touch the contents of the table
-      it may be in use by the injector thread
-    */
-    share->ndb_value[0]= (NdbValue*)
-      alloc_root(mem_root, sizeof(NdbValue) * table->s->fields
-                 + 1 /*extra for hidden key*/);
-    share->ndb_value[1]= (NdbValue*)
-      alloc_root(mem_root, sizeof(NdbValue) * table->s->fields
-                 +1 /*extra for hidden key*/);
     if (table->s->primary_key == MAX_KEY)
       share->flags|= NSF_HIDDEN_PK;
     if (table->s->blob_fields != 0)
@@ -1285,24 +1299,85 @@ end:
 /*
   Handle _non_ data events from the storage nodes
 */
-static int
+//static int
+int
 ndb_handle_schema_change(THD *thd, Ndb *ndb, NdbEventOperation *pOp,
                          NDB_SHARE *share)
 {
+  DBUG_ENTER("ndb_handle_schema_change");
   int remote_drop_table= 0, do_close_cached_tables= 0;
+  const char *dbname= share->table->s->db.str;
+  const char *tabname= share->table->s->table_name.str;
+  bool online_alter_table= (pOp->getEventType() == NDBEVENT::TE_ALTER &&
+                            pOp->tableFrmChanged());
 
   if (pOp->getEventType() != NDBEVENT::TE_CLUSTER_FAILURE &&
-      pOp->getReqNodeId() != g_ndb_cluster_connection->node_id())
-  {
-    ndb->setDatabaseName(share->table->s->db.str);
-    ha_ndbcluster::invalidate_dictionary_cache(share->table->s,
-                                               ndb,
-                                               share->table->s->db.str,
-                                               share->table->s->table_name.str,
-                                               TRUE);
+      (uint) pOp->getReqNodeId() != g_ndb_cluster_connection->node_id())
+  {
+    TABLE_SHARE *table_share= share->table->s; //share->table_share;
+    TABLE* table= share->table;
+    
+    /* 
+       Invalidate table and all it's indexes
+    */
+    ha_ndbcluster table_handler(table_share);
+    table_handler.set_dbname(share->key);
+    table_handler.set_tabname(share->key);
+    table_handler.open_indexes(ndb, table, TRUE);
+    table_handler.invalidate_dictionary_cache(TRUE);
+    
+    if (online_alter_table)
+    {  
+      char key[FN_REFLEN];
+      const void *data= 0, *pack_data= 0;
+      uint length, pack_length;
+      int error;
+      NDBDICT *dict= ndb->getDictionary();
+      const NDBTAB *altered_table= pOp->getTable();
+
+      DBUG_PRINT("info", ("Detected frm change of table %s.%s",
+                          dbname, tabname));
+      build_table_filename(key, FN_LEN-1, dbname, tabname, NullS);
+      /*
+        If the frm of the altered table is different than the one on
+        disk then overwrite it with the new table definition
+      */
+      if (readfrm(key, &data, &length) == 0 &&
+          packfrm(data, length, &pack_data, &pack_length) == 0 &&
+          cmp_frm(altered_table, pack_data, pack_length))
+      {
+        DBUG_DUMP("frm", (char*)altered_table->getFrmData(), 
+                  altered_table->getFrmLength());
+        pthread_mutex_lock(&LOCK_open);
+        dict->putTable(altered_table);
+        
+        if ((error= unpackfrm(&data, &length, altered_table->getFrmData())) ||
+            (error= writefrm(key, data, length)))
+        {
+          sql_print_information("NDB: Failed write frm for %s.%s, error %d",
+                                dbname, tabname, error);
+        }
+        pthread_mutex_unlock(&LOCK_open);
+        close_cached_tables((THD*) 0, 0, (TABLE_LIST*) 0);
+        /*
+        if ((error= ndbcluster_binlog_open_table(thd, share, 
+                                                 table_share, table)))
+          sql_print_information("NDB: Failed to re-open table %s.%s",
+                                dbname, tabname);
+        */
+      }
+    }
     remote_drop_table= 1;
   }
 
+  // If only frm was changed continue replicating
+  if (online_alter_table)
+  {
+    /* Signal ha_ndbcluster::alter_table that drop is done */
+    (void) pthread_cond_signal(&injector_cond);
+    DBUG_RETURN(0);
+  }
+
   (void) pthread_mutex_lock(&share->mutex);
   DBUG_ASSERT(share->op == pOp || share->op_old == pOp);
   if (share->op_old == pOp)
@@ -1481,11 +1556,16 @@ ndb_binlog_thread_handle_schema_event(THD *thd, Ndb *ndb,
       // skip
       break;
     case NDBEVENT::TE_ALTER:
-      /* do the rename of the table in the share */
-      share->table->s->db.str= share->db;
-      share->table->s->db.length= strlen(share->db);
-      share->table->s->table_name.str= share->table_name;
-      share->table->s->table_name.length= strlen(share->table_name);
+      if (pOp->tableNameChanged())
+      {  
+        DBUG_PRINT("info", ("Detected name change of table %s.%s",
+                            share->db, share->table_name));
+        /* do the rename of the table in the share */
+        share->table->s->db.str= share->db;
+        share->table->s->db.length= strlen(share->db);
+        share->table->s->table_name.str= share->table_name;
+        share->table->s->table_name.length= strlen(share->table_name);
+      }
       ndb_handle_schema_change(thd, ndb, pOp, share);
       break;
     case NDBEVENT::TE_CLUSTER_FAILURE:
@@ -1766,6 +1846,7 @@ int ndbcluster_create_binlog_setup(Ndb *ndb, const char *key,
   /* Handle any trailing share */
   NDB_SHARE *share= (NDB_SHARE*) hash_search(&ndbcluster_open_tables,
                                              (byte*) key, key_len);
+
   if (share && share_may_exist)
   {
     if (share->flags & NSF_NO_BINLOG ||
@@ -2362,17 +2443,22 @@ ndb_binlog_thread_handle_non_data_event(Ndb *ndb, NdbEventOperation *pOp,
                        share->key, share, pOp, share->op, share->op_old));
     break;
   case NDBEVENT::TE_ALTER:
-    /* ToDo: remove printout */
-    if (ndb_extra_logging)
-      sql_print_information("NDB Binlog: rename table %s%s/%s -> %s.",
-                            share_prefix, share->table->s->db.str,
-                            share->table->s->table_name.str,
-                            share->key);
-    /* do the rename of the table in the share */
-    share->table->s->db.str= share->db;
-    share->table->s->db.length= strlen(share->db);
-    share->table->s->table_name.str= share->table_name;
-    share->table->s->table_name.length= strlen(share->table_name);
+    if (pOp->tableNameChanged())
+    {
+      DBUG_PRINT("info", ("Detected name change of table %s.%s",
+                          share->db, share->table_name));
+      /* ToDo: remove printout */
+      if (ndb_extra_logging)
+        sql_print_information("NDB Binlog: rename table %s%s/%s -> %s.",
+                              share_prefix, share->table->s->db.str,
+                              share->table->s->table_name.str,
+                              share->key);
+      /* do the rename of the table in the share */
+      share->table->s->db.str= share->db;
+      share->table->s->db.length= strlen(share->db);
+      share->table->s->table_name.str= share->table_name;
+      share->table->s->table_name.length= strlen(share->table_name);
+    }
     goto drop_alter_common;
   case NDBEVENT::TE_DROP:
     if (apply_status_share == share)

sql/ha_ndbcluster_binlog.h

@@ -122,6 +122,8 @@ ndbcluster_show_status_binlog(THD* thd, stat_print_fn *stat_print,
   prototypes for ndb handler utility function also needed by
   the ndb binlog code
 */
+int cmp_frm(const NDBTAB *ndbtab, const void *pack_data,
+            uint pack_length);
 int ndbcluster_find_all_files(THD *thd);
 #endif /* HAVE_NDB_BINLOG */
 

storage/ndb/include/kernel/ndb_limits.h

@@ -66,6 +66,7 @@
 #define MAX_FRAGMENT_DATA_BYTES (4+(2 * 8 * MAX_REPLICAS * MAX_NDB_NODES))
 #define MAX_NDB_PARTITIONS 1024
 #define MAX_RANGE_DATA (131072+MAX_NDB_PARTITIONS) //0.5 MByte of list data
+#define MAX_WORDS_META_FILE 16382
 
 #define MIN_ATTRBUF ((MAX_ATTRIBUTES_IN_TABLE/24) + 1)
 /*

storage/ndb/include/kernel/signaldata/AlterTable.hpp

@@ -39,6 +39,7 @@ class AlterTableReq {
   friend class NdbEventOperationImpl;
   friend class NdbDictInterface;
   friend class Dbdict;
+  friend class Suma;
 
   /**
    * For printing

storage/ndb/include/ndbapi/NdbDictionary.hpp

@@ -1597,6 +1597,14 @@ public:
      */
     const Table * getTable(const char * name) const;
 
+#ifndef DOXYGEN_SHOULD_SKIP_INTERNAL
+    /*
+     * Save a table definition in dictionary cache
+     * @param table Object to put into cache
+     */
+    void putTable(const Table * table);
+#endif
+
     /**
      * Get index with given name, NULL if undefined
      * @param indexName  Name of index to get.

storage/ndb/include/ndbapi/NdbEventOperation.hpp

@@ -220,6 +220,7 @@ public:
 
 #ifndef DOXYGEN_SHOULD_SKIP_INTERNAL
   /** these are subject to change at any time */
+  const NdbDictionary::Table* getTable() const;
   const NdbDictionary::Event *getEvent() const;
   const NdbRecAttr *getFirstPkAttr() const;
   const NdbRecAttr *getFirstPkPreAttr() const;

storage/ndb/src/kernel/blocks/backup/Backup.hpp

@@ -530,7 +530,7 @@ public:
   Config c_defaults;
   Uint32 m_diskless;
 
-  STATIC_CONST(NO_OF_PAGES_META_FILE = 2);
+  STATIC_CONST(NO_OF_PAGES_META_FILE = MAX_WORDS_META_FILE/BACKUP_WORDS_PER_PAGE);
 
   /**
    * Pools

storage/ndb/src/kernel/blocks/suma/Suma.cpp

@@ -42,6 +42,7 @@
 #include <signaldata/GCPSave.hpp>
 #include <signaldata/CreateTab.hpp>
 #include <signaldata/DropTab.hpp>
+#include <signaldata/AlterTable.hpp>
 #include <signaldata/AlterTab.hpp>
 #include <signaldata/DihFragCount.hpp>
 #include <signaldata/SystemError.hpp>
@@ -3440,7 +3441,7 @@ Suma::execDROP_TAB_CONF(Signal *signal)
   DBUG_VOID_RETURN;
 }
 
-static Uint32 b_dti_buf[10000];
+static Uint32 b_dti_buf[MAX_WORDS_META_FILE];
 
 void
 Suma::execALTER_TAB_REQ(Signal *signal)
@@ -3462,7 +3463,7 @@ Suma::execALTER_TAB_REQ(Signal *signal)
   }
 
   DBUG_PRINT("info",("alter table id: %d[i=%u]", tableId, tabPtr.i));
-
+  Table::State old_state = tabPtr.p->m_state;
   tabPtr.p->m_state = Table::ALTERED;
   // triggers must be removed, waiting for sub stop req for that
 
@@ -3520,6 +3521,11 @@ Suma::execALTER_TAB_REQ(Signal *signal)
       DBUG_PRINT("info",("sent to subscriber %d", subbPtr.i));
     }
   }
+  if (AlterTableReq::getFrmFlag(changeMask))
+  {
+    // Frm changes only are handled on-line
+    tabPtr.p->m_state = old_state;
+  }
   DBUG_VOID_RETURN;
 }
 

storage/ndb/src/ndbapi/NdbDictionary.cpp

@@ -1349,6 +1349,13 @@ NdbDictionary::Dictionary::getTable(const char * name, void **data) const
   return 0;
 }
 
+void NdbDictionary::Dictionary::putTable(const NdbDictionary::Table * table)
+{
+ NdbDictionary::Table  *copy_table = new NdbDictionary::Table;
+  *copy_table = *table;
+  m_impl.putTable(&NdbTableImpl::getImpl(*copy_table));
+}
+
 void NdbDictionary::Dictionary::set_local_table_data_size(unsigned sz)
 {
   m_impl.m_local_table_data_size= sz;

storage/ndb/src/ndbapi/NdbDictionaryImpl.cpp

@@ -1305,7 +1305,14 @@ NdbDictionaryImpl::fetchGlobalTableImpl(const BaseString& internalTableName)
 void
 NdbDictionaryImpl::putTable(NdbTableImpl *impl)
 {
+  NdbTableImpl *old;
+
   m_globalHash->lock();
+  if ((old= m_globalHash->get(impl->m_internalName.c_str())))
+  {
+    old->m_status = NdbDictionary::Object::Invalid;
+    m_globalHash->drop(old);
+  }
   m_globalHash->put(impl->m_internalName.c_str(), impl);
   m_globalHash->unlock();
   Ndb_local_table_info *info=
@@ -1313,6 +1320,8 @@ NdbDictionaryImpl::putTable(NdbTableImpl *impl)
   
   m_localHash.put(impl->m_internalName.c_str(), info);
   
+  addBlobTables(*impl);
+
   m_ndb.theFirstTupleId[impl->getTableId()] = ~0;
   m_ndb.theLastTupleId[impl->getTableId()]  = ~0;
 }

storage/ndb/src/ndbapi/NdbEventOperation.cpp

@@ -144,6 +144,10 @@ NdbEventOperation::print()
 /*
  * Internal for the mysql server
  */
+const NdbDictionary::Table *NdbEventOperation::getTable() const
+{
+  return m_impl.m_eventImpl->m_tableImpl->m_facade;
+}
 const NdbDictionary::Event *NdbEventOperation::getEvent() const
 {
   return m_impl.m_eventImpl->m_facade;

storage/ndb/src/ndbapi/NdbEventOperationImpl.cpp

@@ -645,6 +645,14 @@ NdbEventOperationImpl::receive_event()
                                     m_buffer.length() / 4, 
                                     true);
     m_buffer.clear();
+    if (at)
+      at->buildColumnHash();
+    else
+    {
+      DBUG_PRINT_EVENT("info", ("Failed to parse DictTabInfo error %u", 
+                                error.code));
+      DBUG_RETURN_EVENT(1);
+    }
     if ( m_eventImpl->m_tableImpl) 
       delete m_eventImpl->m_tableImpl;
     m_eventImpl->m_tableImpl = at;