ha_ndbcluster.h, ndb_dd_alter.result, ha_ndbcluster.cc:

  bug#25296  Truncate table converts NDB disk based tables to in-memory tables: Changed fix to use get_tablespace_name directly instead

mysql-test/r/ndb_dd_alter.result

@@ -439,7 +439,7 @@ t1	CREATE TABLE `t1` (
   `a14` blob,
   PRIMARY KEY (`a1`),
   KEY `a3_i` (`a3`)
-) ENGINE=ndbcluster DEFAULT CHARSET=latin1
+) /*!50100 TABLESPACE ts STORAGE DISK */ ENGINE=ndbcluster DEFAULT CHARSET=latin1
 ALTER TABLE test.t1 DROP a14;
 ALTER TABLE test.t1 DROP a13;
 ALTER TABLE test.t1 DROP a12;
@@ -459,7 +459,7 @@ t1	CREATE TABLE `t1` (
   `a4` bit(1) DEFAULT NULL,
   `a5` tinyint(4) DEFAULT NULL,
   KEY `a3_i` (`a3`)
-) ENGINE=ndbcluster DEFAULT CHARSET=latin1
+) /*!50100 TABLESPACE ts STORAGE DISK */ ENGINE=ndbcluster DEFAULT CHARSET=latin1
 DROP TABLE test.t1;
 ALTER TABLESPACE ts
 DROP DATAFILE './table_space/datafile.dat'

sql/ha_ndbcluster.cc

@@ -4734,6 +4734,7 @@ int ha_ndbcluster::create(const char *name,
   const void *data, *pack_data;
   bool create_from_engine= (info->table_options & HA_OPTION_CREATE_FROM_ENGINE);
   bool is_truncate= (thd->lex->sql_command == SQLCOM_TRUNCATE);
+  char tablespace[FN_LEN];
 
   DBUG_ENTER("ha_ndbcluster::create");
   DBUG_PRINT("enter", ("name: %s", name));
@@ -4742,8 +4743,22 @@ int ha_ndbcluster::create(const char *name,
   set_dbname(name);
   set_tabname(name);
 
+  if ((my_errno= check_ndb_connection()))
+    DBUG_RETURN(my_errno);
+  
+  Ndb *ndb= get_ndb();
+  NDBDICT *dict= ndb->getDictionary();
+
   if (is_truncate)
   {
+    {
+      Ndb_table_guard ndbtab_g(dict, m_tabname);
+      if (!(m_table= ndbtab_g.get_table()))
+	ERR_RETURN(dict->getNdbError());
+      if ((get_tablespace_name(thd, tablespace, FN_LEN)))
+	info->tablespace= tablespace;    
+      m_table= NULL;
+    }
     DBUG_PRINT("info", ("Dropping and re-creating table for TRUNCATE"));
     if ((my_errno= delete_table(name)))
       DBUG_RETURN(my_errno);
@@ -4903,12 +4918,7 @@ int ha_ndbcluster::create(const char *name,
     DBUG_RETURN(my_errno);
   }
 
-  if ((my_errno= check_ndb_connection()))
-    DBUG_RETURN(my_errno);
-  
   // Create the table in NDB     
-  Ndb *ndb= get_ndb();
-  NDBDICT *dict= ndb->getDictionary();
   if (dict->createTable(tab) != 0) 
   {
     const NdbError err= dict->getNdbError();
@@ -8309,15 +8319,6 @@ ha_ndbcluster::setup_recattr(const NdbRecAttr* curr)
   DBUG_RETURN(0);
 }
 
-void ha_ndbcluster::update_create_info(HA_CREATE_INFO *create_info)
-{
-  THD *thd= current_thd;
-
-  if (thd->lex->sql_command == SQLCOM_TRUNCATE &&
-      get_tablespace_name(thd,0,0))
-    create_info->storage_media= HA_SM_DISK;
-}
-
 char*
 ha_ndbcluster::update_table_comment(
                                 /* out: table comment + additional */
@@ -10016,6 +10017,7 @@ char* ha_ndbcluster::get_tablespace_name(THD *thd, char* name, uint name_len)
     ndberr= ndbdict->getNdbError();
     if(ndberr.classification != NdbError::NoError)
       goto err;
+    DBUG_PRINT("info", ("Found tablespace '%s'", ts.getName()));
     if (name)
     {
       strxnmov(name, name_len, ts.getName(), NullS);

sql/ha_ndbcluster.h

@@ -884,7 +884,6 @@ static void set_tabname(const char *pathname, char *tabname);
                                   ulonglong *nb_reserved_values);
   bool uses_blob_value();
 
-  void update_create_info(HA_CREATE_INFO *create_info);
   char *update_table_comment(const char * comment);
 
   int write_ndb_file(const char *name);