Made set_part_info a handler method and not a ha_partition method only

The previous variant where it was a specific ha_partition method
only worked for the partition handler. It was unfortunately called also
for the NDB handler and in this case it called a random method in the
NDB handler with random input.


sql/ha_ndbcluster.cc:
  Moved initialisation of some handler variables to
  set_part_info method called earlly in the open process
sql/ha_ndbcluster.h:
  Moved initialisation of some handler variables to
  set_part_info method called earlly in the open process
sql/ha_partition.h:
  Made set_part_info a handler method and not a ha_partition method only
sql/handler.h:
  Made set_part_info a handler method and not a ha_partition method only
sql/sql_partition.cc:
  Made set_part_info a handler method and not a ha_partition method only

sql/ha_ndbcluster.cc

@@ -4503,18 +4503,18 @@ int ha_ndbcluster::open(const char *name, int mode, uint test_if_locked)
   if (!res)
     info(HA_STATUS_VARIABLE | HA_STATUS_CONST);
 
-  if (table->part_info)
-  {
-    m_part_info= table->part_info;
-    if (!(m_part_info->part_type == HASH_PARTITION &&
-          m_part_info->list_of_part_fields &&
-          !is_sub_partitioned(m_part_info)))
-      m_use_partition_function= TRUE;
-  }
 
   DBUG_RETURN(res);
 }
 
+void ha_ndbcluster::set_part_info(partition_info *part_info)
+{
+  m_part_info= part_info;
+  if (!(m_part_info->part_type == HASH_PARTITION &&
+        m_part_info->list_of_part_fields &&
+        !is_sub_partitioned(m_part_info)))
+    m_use_partition_function= TRUE;
+}
 
 /*
   Close the table

sql/ha_ndbcluster.h

@@ -534,6 +534,7 @@ class ha_ndbcluster: public handler
     return (HA_CAN_PARTITION | HA_CAN_UPDATE_PARTITION_KEY |
             HA_CAN_PARTITION_UNIQUE);
   }
+  void set_part_info(partition_info *part_info);
   ulong index_flags(uint idx, uint part, bool all_parts) const;
   uint max_supported_record_length() const;
   uint max_supported_keys() const;

sql/ha_partition.h

@@ -122,7 +122,7 @@ private:
   PARTITION_SHARE *share;               /* Shared lock info */
 
 public:
-  void set_part_info(partition_info *part_info)
+  virtual void set_part_info(partition_info *part_info)
   {
      m_part_info= part_info;
      m_is_sub_partitioned= is_sub_partitioned(part_info);

sql/handler.h

@@ -1273,6 +1273,7 @@ public:
 #ifdef WITH_PARTITION_STORAGE_ENGINE
   virtual ulong partition_flags(void) const { return 0;}
   virtual int get_default_no_partitions(ulonglong max_rows) { return 1;}
+  virtual void set_part_info(partition_info *part_info) { return; }
 #endif
   virtual ulong index_flags(uint idx, uint part, bool all_parts) const =0;
   virtual ulong index_ddl_flags(KEY *wanted_index) const

sql/sql_partition.cc

@@ -3128,7 +3128,7 @@ bool mysql_unpack_partition(THD *thd, const uchar *part_buf,
   }
   part_info= lex.part_info;
   table->part_info= part_info;
-  ((ha_partition*)table->file)->set_part_info(part_info);
+  table->file->set_part_info(part_info);
   if (part_info->default_engine_type == DB_TYPE_UNKNOWN)
     part_info->default_engine_type= default_db_type;
   else