Bug#11766249 bug#59316: PARTITIONING AND INDEX_MERGE MEMORY LEAK

When executing row-ordered-retrieval index merge,
the handler was cloned, but it used the wrong
memory root, so instead of allocating memory
on the thread/query's mem_root, it used the table's
mem_root, resulting in non released memory in the
table object, and was not freed until the table was
closed.

Solution was to ensure that memory used during cloning
of a handler was allocated from the correct memory root.

This was implemented by fixing handler::clone() to also
take a name argument, so it can be used with partitioning.
And in ha_partition only allocate the ha_partition's ref, and
call the original ha_partition partitions clone() and set at cloned
partitions.

Fix of .bzrignore on Windows with VS 2010

.bzrignore

@@ -37,7 +37,13 @@
 *.user
 *.vcproj
 *.vcproj.cmake
+*.vcxproj
+*.vcxproj.filters
 */*.dir/*
+*.dir
+Debug
+MySql.sdf
+Win32
 */*_pure_*warnings
 */.deps
 */.libs/*
@@ -46,6 +52,7 @@
 */minsizerel/*
 */release/*
 */relwithdebinfo/*
+RelWithDebInfo
 *~
 .*.swp
 ./CMakeCache.txt
@@ -607,6 +614,7 @@ include/mysql_h.ic
 include/mysql_version.h
 include/mysqld_ername.h
 include/mysqld_error.h
+include/mysqld_error.h.rule
 include/openssl
 include/readline
 include/readline/*.h
@@ -1879,7 +1887,9 @@ scripts/mysql_find_rows
 scripts/mysql_fix_extensions
 scripts/mysql_fix_privilege_tables
 scripts/mysql_fix_privilege_tables.sql
+scripts/mysql_fix_privilege_tables.sql.rule
 scripts/mysql_fix_privilege_tables_sql.c
+scripts/mysql_fix_privilege_tables_sql.c.rule
 scripts/mysql_install_db
 scripts/mysql_secure_installation
 scripts/mysql_setpermission
@@ -2116,6 +2126,7 @@ sql/handlerton.cc
 sql/html
 sql/latex
 sql/lex_hash.h
+sql/lex_hash.h.rule
 sql/link_sources
 sql/max/*
 sql/message.h
@@ -2147,6 +2158,7 @@ sql/sql_builtin.cc
 sql/sql_select.cc.orig
 sql/sql_yacc.cc
 sql/sql_yacc.h
+sql/sql_yacc.h.rule
 sql/sql_yacc.output
 sql/sql_yacc.yy.orig
 sql/test_time

sql/ha_partition.cc

@@ -163,10 +163,14 @@ const uint ha_partition::NO_CURRENT_PART_ID= 0xFFFFFFFF;
 */
 
 ha_partition::ha_partition(handlerton *hton, TABLE_SHARE *share)
-  :handler(hton, share), m_part_info(NULL), m_create_handler(FALSE),
-   m_is_sub_partitioned(0)
+  :handler(hton, share)
 {
   DBUG_ENTER("ha_partition::ha_partition(table)");
+  m_part_info= NULL;
+  m_create_handler= FALSE;
+  m_is_sub_partitioned= 0;
+  m_is_clone_of= NULL;
+  m_clone_mem_root= NULL;
   init_handler_variables();
   DBUG_VOID_RETURN;
 }
@@ -184,15 +188,46 @@ ha_partition::ha_partition(handlerton *hton, TABLE_SHARE *share)
 */
 
 ha_partition::ha_partition(handlerton *hton, partition_info *part_info)
-  :handler(hton, NULL), m_part_info(part_info), m_create_handler(TRUE),
-   m_is_sub_partitioned(m_part_info->is_sub_partitioned())
+  :handler(hton, NULL)
 {
   DBUG_ENTER("ha_partition::ha_partition(part_info)");
+  DBUG_ASSERT(part_info);
+  m_part_info= part_info;
+  m_create_handler= TRUE;
+  m_is_sub_partitioned= m_part_info->is_sub_partitioned();
   init_handler_variables();
-  DBUG_ASSERT(m_part_info);
   DBUG_VOID_RETURN;
 }
 
+/**
+  ha_partition constructor method used by ha_partition::clone()
+
+    @param hton               Handlerton (partition_hton)
+    @param share              Table share object
+    @param part_info_arg      partition_info to use
+    @param clone_arg          ha_partition to clone
+    @param clme_mem_root_arg  MEM_ROOT to use
+
+  @return New partition handler
+*/
+
+ha_partition::ha_partition(handlerton *hton, TABLE_SHARE *share,
+                           partition_info *part_info_arg,
+                           ha_partition *clone_arg,
+                           MEM_ROOT *clone_mem_root_arg)
+  :handler(hton, share)
+{
+  DBUG_ENTER("ha_partition::ha_partition(clone)");
+  m_part_info= part_info_arg;
+  m_create_handler= TRUE;
+  m_is_sub_partitioned= m_part_info->is_sub_partitioned();
+  m_is_clone_of= clone_arg;
+  m_clone_mem_root= clone_mem_root_arg;
+  init_handler_variables();
+  m_tot_parts= clone_arg->m_tot_parts;
+  DBUG_ASSERT(m_tot_parts);
+  DBUG_VOID_RETURN;
+}
 
 /*
   Initialize handler object
@@ -244,7 +279,6 @@ void ha_partition::init_handler_variables()
   m_rec0= 0;
   m_curr_key_info[0]= NULL;
   m_curr_key_info[1]= NULL;
-  is_clone= FALSE,
   m_part_func_monotonicity_info= NON_MONOTONIC;
   auto_increment_lock= FALSE;
   auto_increment_safe_stmt_log_lock= FALSE;
@@ -359,7 +393,8 @@ bool ha_partition::initialize_partition(MEM_ROOT *mem_root)
     */
     DBUG_RETURN(0);
   }
-  else if (get_from_handler_file(table_share->normalized_path.str, mem_root))
+  else if (get_from_handler_file(table_share->normalized_path.str,
+                                 mem_root, false))
   {
     my_message(ER_UNKNOWN_ERROR, "Failed to read from the .par file", MYF(0));
     DBUG_RETURN(1);
@@ -1848,7 +1883,7 @@ uint ha_partition::del_ren_cre_table(const char *from,
     DBUG_RETURN(TRUE);
   }
 
-  if (get_from_handler_file(from, ha_thd()->mem_root))
+  if (get_from_handler_file(from, ha_thd()->mem_root, false))
     DBUG_RETURN(TRUE);
   DBUG_ASSERT(m_file_buffer);
   DBUG_PRINT("enter", ("from: (%s) to: (%s)", from, to));
@@ -2368,7 +2403,8 @@ error_end:
     partitions.
 */
 
-bool ha_partition::get_from_handler_file(const char *name, MEM_ROOT *mem_root)
+bool ha_partition::get_from_handler_file(const char *name, MEM_ROOT *mem_root,
+                                         bool clone)
 {
   char buff[FN_REFLEN], *address_tot_name_len;
   File file;
@@ -2403,15 +2439,18 @@ bool ha_partition::get_from_handler_file(const char *name, MEM_ROOT *mem_root)
   m_tot_parts= uint4korr((file_buffer) + 8);
   DBUG_PRINT("info", ("No of parts = %u", m_tot_parts));
   tot_partition_words= (m_tot_parts + 3) / 4;
-  engine_array= (handlerton **) my_alloca(m_tot_parts * sizeof(handlerton*));
-  for (i= 0; i < m_tot_parts; i++)
+  if (!clone)
   {
-    engine_array[i]= ha_resolve_by_legacy_type(ha_thd(),
-                                               (enum legacy_db_type)
-                                               *(uchar *) ((file_buffer) +
-                                                           12 + i));
-    if (!engine_array[i])
-      goto err3;
+    engine_array= (handlerton **) my_alloca(m_tot_parts * sizeof(handlerton*));
+    for (i= 0; i < m_tot_parts; i++)
+    {
+      engine_array[i]= ha_resolve_by_legacy_type(ha_thd(),
+                                                 (enum legacy_db_type)
+                                                 *(uchar *) ((file_buffer) +
+                                                             12 + i));
+      if (!engine_array[i])
+        goto err3;
+    }
   }
   address_tot_name_len= file_buffer + 12 + 4 * tot_partition_words;
   tot_name_words= (uint4korr(address_tot_name_len) + 3) / 4;
@@ -2422,16 +2461,19 @@ bool ha_partition::get_from_handler_file(const char *name, MEM_ROOT *mem_root)
   m_file_buffer= file_buffer;          // Will be freed in clear_handler_file()
   m_name_buffer_ptr= name_buffer_ptr;
   
-  if (!(m_engine_array= (plugin_ref*)
-                my_malloc(m_tot_parts * sizeof(plugin_ref), MYF(MY_WME))))
-    goto err3;
+  if (!clone)
+  {
+    if (!(m_engine_array= (plugin_ref*)
+                  my_malloc(m_tot_parts * sizeof(plugin_ref), MYF(MY_WME))))
+      goto err3;
 
-  for (i= 0; i < m_tot_parts; i++)
-    m_engine_array[i]= ha_lock_engine(NULL, engine_array[i]);
+    for (i= 0; i < m_tot_parts; i++)
+      m_engine_array[i]= ha_lock_engine(NULL, engine_array[i]);
 
-  my_afree((gptr) engine_array);
+    my_afree((gptr) engine_array);
+  }
     
-  if (!m_file && create_handlers(mem_root))
+  if (!clone && !m_file && create_handlers(mem_root))
   {
     clear_handler_file();
     DBUG_RETURN(TRUE);
@@ -2439,7 +2481,8 @@ bool ha_partition::get_from_handler_file(const char *name, MEM_ROOT *mem_root)
   DBUG_RETURN(FALSE);
 
 err3:
-  my_afree((gptr) engine_array);
+  if (!clone)
+    my_afree((gptr) engine_array);
 err2:
   my_free(file_buffer, MYF(0));
 err1:
@@ -2491,13 +2534,13 @@ void ha_data_partition_destroy(void *ha_data)
 
 int ha_partition::open(const char *name, int mode, uint test_if_locked)
 {
-  char *name_buffer_ptr= m_name_buffer_ptr;
+  char *name_buffer_ptr;
   int error;
   uint alloc_len;
   handler **file;
   char name_buff[FN_REFLEN];
   bool is_not_tmp_table= (table_share->tmp_table == NO_TMP_TABLE);
-  ulonglong check_table_flags= 0;
+  ulonglong check_table_flags;
   DBUG_ENTER("ha_partition::open");
 
   DBUG_ASSERT(table->s == table_share);
@@ -2505,8 +2548,9 @@ int ha_partition::open(const char *name, int mode, uint test_if_locked)
   m_mode= mode;
   m_open_test_lock= test_if_locked;
   m_part_field_array= m_part_info->full_part_field_array;
-  if (get_from_handler_file(name, &table->mem_root))
+  if (get_from_handler_file(name, &table->mem_root, test(m_is_clone_of)))
     DBUG_RETURN(1);
+  name_buffer_ptr= m_name_buffer_ptr;
   m_start_key.length= 0;
   m_rec0= table->record[0];
   m_rec_length= table_share->reclength;
@@ -2542,8 +2586,9 @@ int ha_partition::open(const char *name, int mode, uint test_if_locked)
     DBUG_RETURN(1);
   bitmap_clear_all(&m_bulk_insert_started);
   /* Initialize the bitmap we use to determine what partitions are used */
-  if (!is_clone)
+  if (!m_is_clone_of)
   {
+    DBUG_ASSERT(!m_clone_mem_root);
     if (bitmap_init(&(m_part_info->used_partitions), NULL, m_tot_parts, TRUE))
     {
       bitmap_free(&m_bulk_insert_started);
@@ -2552,32 +2597,70 @@ int ha_partition::open(const char *name, int mode, uint test_if_locked)
     bitmap_set_all(&(m_part_info->used_partitions));
   }
 
+  if (m_is_clone_of)
+  {
+    uint i;
+    DBUG_ASSERT(m_clone_mem_root);
+    /* Allocate an array of handler pointers for the partitions handlers. */
+    alloc_len= (m_tot_parts + 1) * sizeof(handler*);
+    if (!(m_file= (handler **) alloc_root(m_clone_mem_root, alloc_len)))
+      goto err_alloc;
+    memset(m_file, 0, alloc_len);
+    /*
+      Populate them by cloning the original partitions. This also opens them.
+      Note that file->ref is allocated too.
+    */
+    file= m_is_clone_of->m_file;
+    for (i= 0; i < m_tot_parts; i++)
+    {
+      create_partition_name(name_buff, name, name_buffer_ptr, NORMAL_PART_NAME,
+                            FALSE);
+      if (!(m_file[i]= file[i]->clone((const char*) name_buff,
+                                      m_clone_mem_root)))
+      {
+        error= HA_ERR_INITIALIZATION;
+        file= &m_file[i];
+        goto err_handler;
+      }
+      name_buffer_ptr+= strlen(name_buffer_ptr) + 1;
+    }
+  }
+  else
+  {
+   file= m_file;
+   do
+   {
+      create_partition_name(name_buff, name, name_buffer_ptr, NORMAL_PART_NAME,
+                            FALSE);
+      if ((error= (*file)->ha_open(table, (const char*) name_buff, mode,
+                                  test_if_locked)))
+        goto err_handler;
+      m_no_locks+= (*file)->lock_count();
+      name_buffer_ptr+= strlen(name_buffer_ptr) + 1;
+    } while (*(++file));
+  }
+  
   file= m_file;
+  ref_length= (*file)->ref_length;
+  check_table_flags= (((*file)->ha_table_flags() &
+                       ~(PARTITION_DISABLED_TABLE_FLAGS)) |
+                      (PARTITION_ENABLED_TABLE_FLAGS));
+  file++;
   do
   {
-    create_partition_name(name_buff, name, name_buffer_ptr, NORMAL_PART_NAME,
-                          FALSE);
-    if ((error= (*file)->ha_open(table, (const char*) name_buff, mode,
-                                 test_if_locked)))
-      goto err_handler;
-    m_no_locks+= (*file)->lock_count();
-    name_buffer_ptr+= strlen(name_buffer_ptr) + 1;
+    DBUG_ASSERT(ref_length >= (*file)->ref_length);
     set_if_bigger(ref_length, ((*file)->ref_length));
     /*
       Verify that all partitions have the same set of table flags.
       Mask all flags that partitioning enables/disables.
     */
-    if (!check_table_flags)
-    {
-      check_table_flags= (((*file)->ha_table_flags() &
-                           ~(PARTITION_DISABLED_TABLE_FLAGS)) |
-                          (PARTITION_ENABLED_TABLE_FLAGS));
-    }
-    else if (check_table_flags != (((*file)->ha_table_flags() &
-                                    ~(PARTITION_DISABLED_TABLE_FLAGS)) |
-                                   (PARTITION_ENABLED_TABLE_FLAGS)))
+    if (check_table_flags != (((*file)->ha_table_flags() &
+                               ~(PARTITION_DISABLED_TABLE_FLAGS)) |
+                              (PARTITION_ENABLED_TABLE_FLAGS)))
     {
       error= HA_ERR_INITIALIZATION;
+      /* set file to last handler, so all of them is closed */
+      file = &m_file[m_tot_parts - 1];
       goto err_handler;
     }
   } while (*(++file));
@@ -2589,6 +2672,7 @@ int ha_partition::open(const char *name, int mode, uint test_if_locked)
   */
   ref_length+= PARTITION_BYTES_IN_POS;
   m_ref_length= ref_length;
+
   /*
     Release buffer read from .par file. It will not be reused again after
     being opened once.
@@ -2646,25 +2730,55 @@ err_handler:
   DEBUG_SYNC(ha_thd(), "partition_open_error");
   while (file-- != m_file)
     (*file)->close();
+err_alloc:
   bitmap_free(&m_bulk_insert_started);
-  if (!is_clone)
+  if (!m_is_clone_of)
     bitmap_free(&(m_part_info->used_partitions));
 
   DBUG_RETURN(error);
 }
 
-handler *ha_partition::clone(MEM_ROOT *mem_root)
+
+/**
+  Clone the open and locked partitioning handler.
+
+    @param  mem_root  MEM_ROOT to use.
+
+  @return Pointer to the successfully created clone or NULL
+
+  @details
+  This function creates a new ha_partition handler as a clone/copy. The
+  original (this) must already be opened and locked. The clone will use
+  the originals m_part_info.
+  It also allocates memory to ref + ref_dup.
+  In ha_partition::open() it will clone its original handlers partitions
+  which will allocate then om the correct MEM_ROOT and also open them.
+*/
+
+handler *ha_partition::clone(const char *name, MEM_ROOT *mem_root)
 {
-  handler *new_handler= get_new_handler(table->s, mem_root,
-                                        table->s->db_type());
-  ((ha_partition*)new_handler)->m_part_info= m_part_info;
-  ((ha_partition*)new_handler)->is_clone= TRUE;
-  if (new_handler && !new_handler->ha_open(table,
-                                           table->s->normalized_path.str,
-                                           table->db_stat,
-                                           HA_OPEN_IGNORE_IF_LOCKED))
-    return new_handler;
-  return NULL;
+  ha_partition *new_handler;
+  
+  DBUG_ENTER("ha_partition::clone");
+  new_handler= new (mem_root) ha_partition(ht, table_share, m_part_info,
+                                           this, mem_root);
+  if (!new_handler)
+    DBUG_RETURN(NULL);
+
+  /*
+    Allocate new_handler->ref here because otherwise ha_open will allocate it
+    on this->table->mem_root and we will not be able to reclaim that memory 
+    when the clone handler object is destroyed.
+  */
+  new_handler->ref= (uchar*) alloc_root(mem_root, ALIGN_SIZE(m_ref_length)*2);
+  if (!new_handler->ref)
+    DBUG_RETURN(NULL);
+
+  if (new_handler->ha_open(table, name,
+                           table->db_stat, HA_OPEN_IGNORE_IF_LOCKED))
+    DBUG_RETURN(NULL);
+
+  DBUG_RETURN((handler*) new_handler);
 }
 
 
@@ -2695,7 +2809,7 @@ int ha_partition::close(void)
   DBUG_ASSERT(table->s == table_share);
   delete_queue(&m_queue);
   bitmap_free(&m_bulk_insert_started);
-  if (!is_clone)
+  if (!m_is_clone_of)
     bitmap_free(&(m_part_info->used_partitions));
   file= m_file;
 

sql/ha_partition.h

@@ -133,6 +133,13 @@ private:
   bool m_is_sub_partitioned;             // Is subpartitioned
   bool m_ordered_scan_ongoing;
 
+  /* 
+    If set, this object was created with ha_partition::clone and doesn't
+    "own" the m_part_info structure.
+  */
+  ha_partition *m_is_clone_of;
+  MEM_ROOT *m_clone_mem_root;
+  
   /*
     We keep track if all underlying handlers are MyISAM since MyISAM has a
     great number of extra flags not needed by other handlers.
@@ -169,11 +176,6 @@ private:
   PARTITION_SHARE *share;               /* Shared lock info */
 #endif
 
-  /* 
-    TRUE <=> this object was created with ha_partition::clone and doesn't
-    "own" the m_part_info structure.
-  */
-  bool is_clone;
   bool auto_increment_lock;             /**< lock reading/updating auto_inc */
   /**
     Flag to keep the auto_increment lock through out the statement.
@@ -186,7 +188,7 @@ private:
   /** used for prediction of start_bulk_insert rows */
   enum_monotonicity_info m_part_func_monotonicity_info;
 public:
-  handler *clone(MEM_ROOT *mem_root);
+  handler *clone(const char *name, MEM_ROOT *mem_root);
   virtual void set_part_info(partition_info *part_info)
   {
      m_part_info= part_info;
@@ -205,6 +207,10 @@ public:
   */
     ha_partition(handlerton *hton, TABLE_SHARE * table);
     ha_partition(handlerton *hton, partition_info * part_info);
+    ha_partition(handlerton *hton, TABLE_SHARE *share,
+                 partition_info *part_info_arg,
+                 ha_partition *clone_arg,
+                 MEM_ROOT *clone_mem_root_arg);
    ~ha_partition();
   /*
     A partition handler has no characteristics in itself. It only inherits
@@ -275,7 +281,7 @@ private:
     And one method to read it in.
   */
   bool create_handler_file(const char *name);
-  bool get_from_handler_file(const char *name, MEM_ROOT *mem_root);
+  bool get_from_handler_file(const char *name, MEM_ROOT *mem_root, bool clone);
   bool new_handlers_from_part_info(MEM_ROOT *mem_root);
   bool create_handlers(MEM_ROOT *mem_root);
   void clear_handler_file();

sql/handler.cc

@@ -2037,9 +2037,9 @@ int ha_delete_table(THD *thd, handlerton *table_type, const char *path,
 /****************************************************************************
 ** General handler functions
 ****************************************************************************/
-handler *handler::clone(MEM_ROOT *mem_root)
+handler *handler::clone(const char *name, MEM_ROOT *mem_root)
 {
-  handler *new_handler= get_new_handler(table->s, mem_root, table->s->db_type());
+  handler *new_handler= get_new_handler(table->s, mem_root, ht);
   /*
     Allocate handler->ref here because otherwise ha_open will allocate it
     on this->table->mem_root and we will not be able to reclaim that memory 
@@ -2048,7 +2048,7 @@ handler *handler::clone(MEM_ROOT *mem_root)
   if (!(new_handler->ref= (uchar*) alloc_root(mem_root, ALIGN_SIZE(ref_length)*2)))
     return NULL;
   if (new_handler && !new_handler->ha_open(table,
-                                           table->s->normalized_path.str,
+                                           name,
                                            table->db_stat,
                                            HA_OPEN_IGNORE_IF_LOCKED))
     return new_handler;

sql/handler.h

@@ -1166,7 +1166,7 @@ public:
     DBUG_ASSERT(locked == FALSE);
     /* TODO: DBUG_ASSERT(inited == NONE); */
   }
-  virtual handler *clone(MEM_ROOT *mem_root);
+  virtual handler *clone(const char *name, MEM_ROOT *mem_root);
   /** This is called after create to allow us to set up cached variables */
   void init()
   {

sql/opt_range.cc

@@ -1335,7 +1335,7 @@ int QUICK_RANGE_SELECT::init_ror_merged_scan(bool reuse_handler)
   }
 
   thd= head->in_use;
-  if (!(file= head->file->clone(thd->mem_root)))
+  if (!(file= head->file->clone(head->s->normalized_path.str, thd->mem_root)))
   {
     /* 
       Manually set the error flag. Note: there seems to be quite a few

storage/heap/ha_heap.cc

@@ -142,11 +142,11 @@ int ha_heap::close(void)
   DESCRIPTION
     Do same as default implementation but use file->s->name instead of 
     table->s->path. This is needed by Windows where the clone() call sees
-    '/'-delimited path in table->s->path, while ha_peap::open() was called 
+    '/'-delimited path in table->s->path, while ha_heap::open() was called 
     with '\'-delimited path.
 */
 
-handler *ha_heap::clone(MEM_ROOT *mem_root)
+handler *ha_heap::clone(const char *name, MEM_ROOT *mem_root)
 {
   handler *new_handler= get_new_handler(table->s, mem_root, table->s->db_type());
   if (new_handler && !new_handler->ha_open(table, file->s->name, table->db_stat,

storage/heap/ha_heap.h

@@ -34,7 +34,7 @@ class ha_heap: public handler
 public:
   ha_heap(handlerton *hton, TABLE_SHARE *table);
   ~ha_heap() {}
-  handler *clone(MEM_ROOT *mem_root);
+  handler *clone(const char *name, MEM_ROOT *mem_root);
   const char *table_type() const
   {
     return (table->in_use->variables.sql_mode & MODE_MYSQL323) ?

storage/myisam/ha_myisam.cc

@@ -552,9 +552,10 @@ ha_myisam::ha_myisam(handlerton *hton, TABLE_SHARE *table_arg)
    can_enable_indexes(1)
 {}
 
-handler *ha_myisam::clone(MEM_ROOT *mem_root)
+handler *ha_myisam::clone(const char *name, MEM_ROOT *mem_root)
 {
-  ha_myisam *new_handler= static_cast <ha_myisam *>(handler::clone(mem_root));
+  ha_myisam *new_handler= static_cast <ha_myisam *>(handler::clone(name,
+                                                                   mem_root));
   if (new_handler)
     new_handler->file->state= file->state;
   return new_handler;

storage/myisam/ha_myisam.h

@@ -44,7 +44,7 @@ class ha_myisam: public handler
  public:
   ha_myisam(handlerton *hton, TABLE_SHARE *table_arg);
   ~ha_myisam() {}
-  handler *clone(MEM_ROOT *mem_root);
+  handler *clone(const char *name, MEM_ROOT *mem_root);
   const char *table_type() const { return "MyISAM"; }
   const char *index_type(uint key_number);
   const char **bas_ext() const;

storage/myisammrg/ha_myisammrg.cc

@@ -459,8 +459,7 @@ int ha_myisammrg::open(const char *name, int mode __attribute__((unused)),
       problem because all locking is handled by the original MERGE table
       from which this is cloned of.
     */
-    if (!(file= myrg_open(table->s->normalized_path.str, table->db_stat, 
-                                       HA_OPEN_IGNORE_IF_LOCKED)))
+    if (!(file= myrg_open(name, table->db_stat, HA_OPEN_IGNORE_IF_LOCKED)))
     {
       DBUG_PRINT("error", ("my_errno %d", my_errno));
       DBUG_RETURN(my_errno ? my_errno : -1); 
@@ -484,7 +483,7 @@ int ha_myisammrg::open(const char *name, int mode __attribute__((unused)),
 
    @return A cloned handler instance.
  */
-handler *ha_myisammrg::clone(MEM_ROOT *mem_root)
+handler *ha_myisammrg::clone(const char *name, MEM_ROOT *mem_root)
 {
   MYRG_TABLE    *u_table,*newu_table;
   ha_myisammrg *new_handler= 
@@ -505,8 +504,8 @@ handler *ha_myisammrg::clone(MEM_ROOT *mem_root)
     return NULL;
   }
 
-  if (new_handler->ha_open(table, table->s->normalized_path.str, table->db_stat,
-                            HA_OPEN_IGNORE_IF_LOCKED))
+  if (new_handler->ha_open(table, name, table->db_stat,
+                           HA_OPEN_IGNORE_IF_LOCKED))
   {
     delete new_handler;
     return NULL;

storage/myisammrg/ha_myisammrg.h

@@ -62,7 +62,7 @@ class ha_myisammrg: public handler
   int open(const char *name, int mode, uint test_if_locked);
   int attach_children(void);
   int detach_children(void);
-  virtual handler *clone(MEM_ROOT *mem_root);
+  virtual handler *clone(const char *name, MEM_ROOT *mem_root);
   int close(void);
   int write_row(uchar * buf);
   int update_row(const uchar * old_data, uchar * new_data);