Binary protocol changes (to monty)

libmysql/libmysql.c

@@ -1739,6 +1739,7 @@ static void mysql_once_init()
 
 #define strdup_if_not_null(A) (A) == 0 ? 0 : my_strdup((A),MYF(MY_WME))
 
+#ifdef HAVE_OPENSSL
 my_bool STDCALL
 mysql_ssl_set(MYSQL *mysql __attribute__((unused)) ,
 	      const char *key __attribute__((unused)),
@@ -1747,15 +1748,14 @@ mysql_ssl_set(MYSQL *mysql __attribute__((unused)) ,
 	      const char *capath __attribute__((unused)),
 	      const char *cipher __attribute__((unused)))
 {
-#ifdef HAVE_OPENSSL
   mysql->options.ssl_key=    strdup_if_not_null(key);
   mysql->options.ssl_cert=   strdup_if_not_null(cert);
   mysql->options.ssl_ca=     strdup_if_not_null(ca);
   mysql->options.ssl_capath= strdup_if_not_null(capath);
   mysql->options.ssl_cipher= strdup_if_not_null(cipher);
-#endif
   return 0;
 }
+#endif
 
 
 /**************************************************************************
@@ -1763,10 +1763,10 @@ mysql_ssl_set(MYSQL *mysql __attribute__((unused)) ,
   NB! Errors are not reported until you do mysql_real_connect.
 **************************************************************************/
 
+#ifdef HAVE_OPENSLL
 static void
 mysql_ssl_free(MYSQL *mysql __attribute__((unused)))
 {
-#ifdef HAVE_OPENSLL
   my_free(mysql->options.ssl_key, MYF(MY_ALLOW_ZERO_PTR));
   my_free(mysql->options.ssl_cert, MYF(MY_ALLOW_ZERO_PTR));
   my_free(mysql->options.ssl_ca, MYF(MY_ALLOW_ZERO_PTR));
@@ -1780,8 +1780,8 @@ mysql_ssl_free(MYSQL *mysql __attribute__((unused)))
   mysql->options.ssl_cipher= 0;
   mysql->options.use_ssl = FALSE;
   mysql->connector_fd = 0;
-#endif /* HAVE_OPENSLL */
 }
+#endif /* HAVE_OPENSLL */
 
 /**************************************************************************
   Connect to sql server
@@ -3824,12 +3824,13 @@ static my_bool my_realloc_str(NET *net, ulong length)
     1	error
 */
 
-static my_bool read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
+static my_bool read_prepare_result(MYSQL_STMT *stmt)
 {
   uchar *pos;
   uint field_count;
+  ulong length, param_count;
   MYSQL_DATA *fields_data;
-  ulong length;
+  MYSQL *mysql= stmt->mysql;
   DBUG_ENTER("read_prepare_result");
 
   mysql= mysql->last_used_con;
@@ -3837,9 +3838,9 @@ static my_bool read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
     DBUG_RETURN(1);
 
   pos=(uchar*) mysql->net.read_pos;
-  stmt->stmt_id=    uint4korr(pos); pos+=4;
-  field_count=      uint2korr(pos); pos+=2;
-  stmt->param_count=uint2korr(pos); pos+=2;
+  stmt->stmt_id= uint4korr(pos); pos+=4;
+  field_count=   uint2korr(pos); pos+=2;
+  param_count=   uint2korr(pos); pos+=2;
 
   if (field_count != 0)
   {
@@ -3862,9 +3863,10 @@ static my_bool read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
     set_stmt_error(stmt, CR_OUT_OF_MEMORY);
     DBUG_RETURN(0);
   }
-  stmt->bind=		(stmt->params + stmt->param_count);
-  stmt->field_count=	(uint) field_count;
-  mysql->status=	MYSQL_STATUS_READY;
+  stmt->bind=		       (stmt->params + stmt->param_count);
+  stmt->field_count=	 (uint) field_count;
+  stmt->param_count=   (ulong) param_count;
+  stmt->mysql->status= MYSQL_STATUS_READY;
   DBUG_RETURN(0);
 }
 
@@ -3908,13 +3910,13 @@ mysql_prepare(MYSQL  *mysql, const char *query, ulong length)
   }
 
   init_alloc_root(&stmt->mem_root,8192,0);
-  if (read_prepare_result(mysql, stmt))
+  stmt->mysql= mysql;
+  if (read_prepare_result(stmt))
   {
     stmt_close(stmt, 1);
     DBUG_RETURN(0);
   }
   stmt->state= MY_ST_PREPARE;
-  stmt->mysql= mysql;
   mysql->stmts= list_add(mysql->stmts, &stmt->list);
   stmt->list.data= stmt;
   DBUG_PRINT("info", ("Parameter count: %ld", stmt->param_count));
@@ -3925,18 +3927,41 @@ mysql_prepare(MYSQL  *mysql, const char *query, ulong length)
 /*
   Returns prepared meta information in the form of resultset
   to client.
+TODO : Return param information also
 */
 
+MYSQL_RES *prepare_result(MYSQL_FIELD *fields, unsigned long count)
+{
+  MYSQL_RES *result;
+  
+  if (!count || !fields)
+    return 0;
+
+  if (!(result=(MYSQL_RES*) my_malloc(sizeof(*result)+
+				      sizeof(ulong)*count,
+				      MYF(MY_WME | MY_ZEROFILL))))
+    return 0;
+
+  result->eof=1;	/* Marker for buffered */
+  result->fields=	fields;
+  result->field_count=	count;
+  return result;
+}
+
 MYSQL_RES * STDCALL
 mysql_prepare_result(MYSQL_STMT *stmt)
 {
   MYSQL_RES *result;
   DBUG_ENTER("mysql_prepare_result");
-
-  if (!stmt->fields)
+  
+  if (!stmt->field_count || !stmt->fields)
     DBUG_RETURN(0);
-  result= &stmt->tmp_result;
-  bzero((char*) result, sizeof(MYSQL_RES));
+  
+  if (!(result=(MYSQL_RES*) my_malloc(sizeof(*result)+
+				      sizeof(ulong)*stmt->field_count,
+				      MYF(MY_WME | MY_ZEROFILL))))
+    return 0;
+
   result->eof=1;	/* Marker for buffered */
   result->fields=	stmt->fields;
   result->field_count=	stmt->field_count;
@@ -4088,12 +4113,13 @@ static my_bool store_param(MYSQL_STMT *stmt, MYSQL_BIND *param)
   DBUG_ENTER("store_param");
   DBUG_PRINT("enter",("type: %d, buffer:%lx, length: %d", param->buffer_type,
     param->buffer ? param->buffer : "0", *param->length));
-
-  if (param->is_null || param->buffer_type == MYSQL_TYPE_NULL)
+  
+  if (param->is_null || param->buffer_type == MYSQL_TYPE_NULL ||
+      *param->length == MYSQL_NULL_DATA)
     store_param_null(net, param);
   else
   {
-    /* Allocate for worst case (long string) */
+    /* Allocate for worst case (long string) */  
     if ((my_realloc_str(net, 9 + *param->length)))
       DBUG_RETURN(1);
     (*param->store_param_func)(net, param);
@@ -4101,7 +4127,6 @@ static my_bool store_param(MYSQL_STMT *stmt, MYSQL_BIND *param)
   DBUG_RETURN(0);
 }
 
-
 /*
   Send the prepare query to server for execution
 */
@@ -4125,13 +4150,6 @@ static my_bool execute(MYSQL_STMT * stmt, char *packet, ulong length)
   }
   stmt->state= MY_ST_EXECUTE;
   mysql_free_result(stmt->result);
-#if USED_IN_FETCH
-  if (stmt->res_buffers) /* Result buffers exists, cache results */
-  {
-    mysql_free_result(stmt->result);
-    stmt->result= mysql_store_result(mysql);
-  }
-  #endif
   DBUG_RETURN(0);
 }
 
@@ -4420,21 +4438,21 @@ static void fetch_result_tinyint(MYSQL_BIND *param, uchar **row)
 
 static void fetch_result_short(MYSQL_BIND *param, uchar **row)
 {
-  short value= *(short *)row;
-  int2store(param->buffer, value);
+  short value= (short)**row;
+  int2store(param->buffer, value); 
   *row+=2;
 }
 
 static void fetch_result_int32(MYSQL_BIND *param, uchar **row)
 {
-  int32 value= *(int32 *)row;
+  int32 value= (int32)**row;
   int4store(param->buffer, value);
   *row+=4;
 }
 
 static void fetch_result_int64(MYSQL_BIND *param, uchar **row)
 {
-  longlong value= *(longlong *)row;
+  longlong value= (longlong)**row;
   int8store(param->buffer, value);
   *row+=8;
 }
@@ -4443,7 +4461,7 @@ static void fetch_result_float(MYSQL_BIND *param, uchar **row)
 {
   float value;
   float4get(value,*row);
-  float4store(param->buffer, *row);
+  float4store(param->buffer, value);
   *row+=4;
 }
 
@@ -4459,6 +4477,7 @@ static void fetch_result_str(MYSQL_BIND *param, uchar **row)
 {
   ulong length= net_field_length(row);
   memcpy(param->buffer, (char *)*row, length);
+  *(param->buffer+length)= '\0'; /* do we need this for all cases.. I doubt */
   *param->length= length;
   *row+=length;
 }
@@ -4537,41 +4556,46 @@ my_bool STDCALL mysql_bind_result(MYSQL_STMT *stmt, MYSQL_BIND *bind)
   Fetch row data to bind buffers
 */
 
-static my_bool
-stmt_fetch_row(MYSQL_STMT *stmt, uchar **row)
+static void
+stmt_fetch_row(MYSQL_STMT *stmt, uchar *row)
 {
   MYSQL_BIND  *bind, *end;
-  uchar *null_ptr= (uchar*) *row, bit;
-
-  row+= (stmt->field_count+9)/8;
-  bit= 4;					/* First 2 bits are reserved */
-
+  MYSQL_FIELD *field;
+  uchar *null_ptr, bit;
+  
+  null_ptr= row; 
+  row+= (stmt->field_count+9)/8; /* skip null bits */
+  bit= 4; /* first 2 bits are reserved */
+  
   /* Copy complete row to application buffers */
-  for (bind= stmt->bind, end= (MYSQL_BIND *) bind + stmt->field_count;
-       bind < end;
-       bind++)
-  {
+  for (bind= stmt->bind, end= (MYSQL_BIND *) bind + stmt->field_count, 
+       field= stmt->fields;
+       bind < end && field;
+       bind++, field++)
+  {         
     if (*null_ptr & bit)
-      bind->is_null= 1;
+      *bind->length= MYSQL_NULL_DATA;
     else
-    {
-      bind->is_null= 0;
-      (*bind->fetch_result)(bind, row);
-    }
+      /* TODO: Add conversion routines code here */
+      (*bind->fetch_result)(bind, &row);
     if (! (bit<<=1) & 255)
     {
-      bit=1;					/* To next byte */
+      bit= 1;					/* To next byte */
       null_ptr++;
     }
   }
-  return 0;
 }
 
 static int read_binary_data(MYSQL *mysql)
-{
+{  
+  /* TODO : Changes needed based on logic of use_result/store_result 
+            Currently by default it is use_result. In case of 
+            store_result, the data packet must point to already 
+            read data.
+   */
   if (packet_error == net_safe_read(mysql))
     return -1;
-  if (mysql->net.read_pos[0])
+  if (mysql->net.read_pos[0] == 254)
     return 1;				/* End of data */
   return 0;
 }
@@ -4584,29 +4608,24 @@ static int read_binary_data(MYSQL *mysql)
 int STDCALL mysql_fetch(MYSQL_STMT *stmt)
 {
   MYSQL *mysql= stmt->mysql;
+  int   res;
   DBUG_ENTER("mysql_fetch");
 
-  if (stmt->res_buffers)
+  if (!(res= read_binary_data(mysql)))
   {
-    int res;
-    if (!(res= read_binary_data(mysql)))
-    {
-      if (stmt->res_buffers)
-	      DBUG_RETURN((int) stmt_fetch_row(stmt,(uchar **) &mysql->net.read_pos+1));
-      DBUG_RETURN(0);
-    }
-    DBUG_PRINT("info", ("end of data"));
-    mysql->status= MYSQL_STATUS_READY;
-
-    if (res < 0)				/* Network error */
-    {
-	   set_stmt_errmsg(stmt,(char *)mysql->net.last_error,
-		                mysql->net.last_errno);
-	   DBUG_RETURN(MYSQL_STATUS_ERROR);
-    }
-    DBUG_RETURN(MYSQL_NO_DATA); /* no more data */
+    if (stmt->res_buffers)
+      stmt_fetch_row(stmt, mysql->net.read_pos+1);
+    DBUG_RETURN(0);
+  }
+  mysql->status= MYSQL_STATUS_READY;
+  if (res < 0)				/* Network error */
+  {
+	  set_stmt_errmsg(stmt,(char *)mysql->net.last_error,
+	                  mysql->net.last_errno);
+	  DBUG_RETURN(MYSQL_STATUS_ERROR);
   }
-  DBUG_RETURN(0); //?? do we need to set MYSQL_STATUS_READY ?
+  DBUG_PRINT("info", ("end of data"));    
+  DBUG_RETURN(MYSQL_NO_DATA); /* no more data */
 }
 
 

sql/field.cc

@@ -2599,7 +2599,7 @@ String *Field_double::val_str(String *val_buffer,
 
 bool Field_double::send_binary(Protocol *protocol)
 {
-  return protocol->store((float) Field_double::val_real(), dec, (String*) 0);
+  return protocol->store((double) Field_double::val_real(), dec, (String*) 0);
 }
 
 
@@ -3169,7 +3169,7 @@ bool Field_time::send_binary(Protocol *protocol)
   Field_time::get_time(&tm);
   tm.day= tm.hour/3600;				// Move hours to days
   tm.hour-= tm.day*3600;
-  return protocol->store(&tm);
+  return protocol->store_time(&tm);
 }
 
 
@@ -3254,6 +3254,13 @@ int Field_year::store(longlong nr)
   return 0;
 }
 
+bool Field_year::send_binary(Protocol *protocol)
+{
+  ulonglong tmp= Field_year::val_int();
+  TIME tm;
+  tm.year= (uint32) tmp;
+  return protocol->store_date(&tm);
+}
 
 double Field_year::val_real(void)
 {
@@ -3371,6 +3378,16 @@ int Field_date::store(longlong nr)
   return error;
 }
 
+bool Field_date::send_binary(Protocol *protocol)
+{
+  longlong tmp= Field_date::val_int();
+  TIME tm;
+  tm.year= (uint32) tmp/10000L % 10000;
+  tm.month= (uint32) tmp/100 % 100;
+  tm.day= (uint32) tmp % 100;
+  return protocol->store_date(&tm);
+}
+
 
 double Field_date::val_real(void)
 {
@@ -3544,7 +3561,12 @@ void Field_newdate::store_time(TIME *ltime,timestamp_type type)
   int3store(ptr,tmp);
 }
 
-
+bool Field_newdate::send_binary(Protocol *protocol)
+{
+  TIME tm;
+  Field_newdate::get_date(&tm,0);
+  return protocol->store_date(&tm);
+}
 
 double Field_newdate::val_real(void)
 {
@@ -3705,6 +3727,13 @@ void Field_datetime::store_time(TIME *ltime,timestamp_type type)
     longlongstore(ptr,tmp);
 }
 
+bool Field_datetime::send_binary(Protocol *protocol)
+{
+  TIME tm;
+  Field_datetime::get_date(&tm, 1);
+  return protocol->store(&tm);
+}
+
 
 double Field_datetime::val_real(void)
 {

sql/field.h

@@ -166,7 +166,7 @@ public:
       ptr-=row_offset;
       return tmp;
     }
-  bool send_binary(Protocol *protocol);
+  virtual bool send_binary(Protocol *protocol);
   virtual char *pack(char* to, const char *from, uint max_length=~(uint) 0)
   {
     uint32 length=pack_length();
@@ -792,7 +792,6 @@ public:
   double val_real(void);
   longlong val_int(void);
   String *val_str(String*,String *);
-  bool send_binary(Protocol *protocol);
   int cmp(const char *,const char*);
   void sort_string(char *buff,uint length);
   void sql_type(String &str) const;
@@ -833,7 +832,6 @@ public:
   double val_real(void);
   longlong val_int(void);
   String *val_str(String*,String *);
-  bool send_binary(Protocol *protocol);
   int cmp(const char *,const char*);
   void sort_string(char *buff,uint length);
   void get_key_image(char *buff,uint length, CHARSET_INFO *cs, imagetype type);
@@ -876,7 +874,6 @@ public:
   double val_real(void);
   longlong val_int(void);
   String *val_str(String*,String *);
-  bool send_binary(Protocol *protocol);
   int cmp(const char *,const char*);
   int cmp(const char *a, uint32 a_length, const char *b, uint32 b_length);
   int cmp_offset(uint offset);
@@ -982,7 +979,6 @@ public:
   double val_real(void);
   longlong val_int(void);
   String *val_str(String*,String *);
-  bool send_binary(Protocol *protocol);
   int cmp(const char *,const char*);
   void sort_string(char *buff,uint length);
   uint32 pack_length() const { return (uint32) packlength; }

sql/protocol.cc

@@ -616,7 +616,7 @@ bool Protocol_simple::store_null()
   field_pos++;
 #endif
   char buff[1];
-  buff[0]= 251;
+  buff[0]= (char)251;
   return packet->append(buff, sizeof(buff), PACKET_BUFFET_EXTRA_ALLOC);
 }
 
@@ -774,13 +774,27 @@ bool Protocol_simple::store_time(TIME *tm)
 
 /****************************************************************************
   Functions to handle the binary protocol used with prepared statements
+
+  Data format:
+
+   [ok:1]                            <-- reserved ok packet
+   [null_field:(field_count+7+2)/8]  <-- reserved to send null data. The size is
+                                         calculated using:
+                                         bit_fields= (field_count+7+2)/8; 
+                                         2 bits are reserved
+   [[length]data]                    <-- data field (the length applies only for 
+                                         string/binary/time/timestamp fields and 
+                                         rest of them are not sent as they have 
+                                         the default length that client understands
+                                         based on the field type
+   [..]..[[length]data]              <-- data
 ****************************************************************************/
 
 bool Protocol_prep::prepare_for_send(List<Item> *item_list)
 {
-  field_count=item_list->elements;
-  bit_fields= (field_count+3)/8;
-  if (packet->alloc(bit_fields))
+  field_count= item_list->elements;
+  bit_fields= (field_count+9)/8;
+  if (packet->alloc(bit_fields+1))
     return 1;
   /* prepare_for_resend will be called after this one */
   return 0;
@@ -789,9 +803,8 @@ bool Protocol_prep::prepare_for_send(List<Item> *item_list)
 
 void Protocol_prep::prepare_for_resend()
 {
-  packet->length(bit_fields);
-  bzero((char*) packet->ptr()+1, bit_fields-1);
-  packet[0]=1;					// Marker for ok packet
+  packet->length(bit_fields+1);
+  bzero((char*) packet->ptr(), 1+bit_fields);
   field_pos=0;
 }
 
@@ -813,7 +826,7 @@ bool Protocol_prep::store(const char *from,uint length)
 
 bool Protocol_prep::store_null()
 {
-  uint offset=(field_pos+2)/8, bit= (1 << ((field_pos+2) & 7));
+  uint offset= (field_pos+2)/8+1, bit= (1 << ((field_pos+2) & 7));
   /* Room for this as it's allocated in prepare_for_send */
   char *to= (char*) packet->ptr()+offset;
   *to= (char) ((uchar) *to | (uchar) bit);
@@ -926,6 +939,7 @@ bool Protocol_prep::store(TIME *tm)
 {
 #ifndef DEBUG_OFF
   DBUG_ASSERT(field_types == 0 ||
+        field_types[field_pos] == MYSQL_TYPE_YEAR ||
 	      field_types[field_pos] == MYSQL_TYPE_DATETIME ||
 	      field_types[field_pos] == MYSQL_TYPE_DATE ||
 	      field_types[field_pos] == MYSQL_TYPE_TIMESTAMP);
@@ -987,3 +1001,10 @@ bool Protocol_prep::store_time(TIME *tm)
   buff[0]=(char) length;			// Length is stored first
   return packet->append(buff, length+1, PACKET_BUFFET_EXTRA_ALLOC);
 }
+
+#if 0
+bool Protocol_prep::send_fields(List<Item> *list, uint flag) 
+{
+  return prepare_for_send(list);
+};
+#endif

sql/sql_prepare.cc

@@ -440,10 +440,9 @@ static bool mysql_test_upd_fields(PREP_STMT *stmt, TABLE_LIST *table_list,
 				  COND *conds)
 {
   THD *thd= stmt->thd;
-  TABLE *table;
   DBUG_ENTER("mysql_test_upd_fields");
 
-  if (!(table = open_ltable(thd,table_list,table_list->lock_type)))
+  if (open_and_lock_tables(thd, table_list))
     DBUG_RETURN(1);
 
   if (setup_tables(table_list) || setup_fields(thd,table_list,fields,1,0,0) || 
@@ -477,13 +476,12 @@ static bool mysql_test_select_fields(PREP_STMT *stmt, TABLE_LIST *tables,
 				     COND *conds, ORDER *order, ORDER *group,
 				     Item *having)
 {
-  TABLE *table;
   bool hidden_group_fields;
   THD *thd= stmt->thd;
   List<Item>  all_fields(fields);
   DBUG_ENTER("mysql_test_select_fields");
 
-  if (!(table = open_ltable(thd,tables,TL_READ)))
+  if (open_and_lock_tables(thd, tables))
     DBUG_RETURN(1);
   
   thd->used_tables=0;	// Updated by setup_fields
@@ -512,7 +510,7 @@ static bool mysql_test_select_fields(PREP_STMT *stmt, TABLE_LIST *tables,
      sending any info on where clause.
   */
   if (send_prep_stmt(stmt, fields.elements) ||
-      thd->protocol_prep.send_fields(&fields,0) ||
+      thd->protocol_simple.send_fields(&fields,0) ||
       send_item_params(stmt))
     DBUG_RETURN(1);
   DBUG_RETURN(0);  
@@ -626,14 +624,17 @@ static bool parse_prepare_query(PREP_STMT *stmt,
 /*
   Initialize parameter items in statement
 */
-static bool init_param_items(THD *thd, PREP_STMT *stmt)
+
+static bool init_param_items( PREP_STMT *stmt)
 {
+  List<Item> &params= stmt->thd->lex.param_list;
   Item_param **to;
+  
   if (!(stmt->param= to= (Item_param **)
         my_malloc(sizeof(Item_param *)*(stmt->param_count+1), 
                   MYF(MY_WME))))
     return 1;
-  List_iterator<Item> param_iterator(thd->lex.param_list);
+  List_iterator<Item> param_iterator(params);
   while ((*(to++) = (Item_param *)param_iterator++));
   return 0;
 }
@@ -659,29 +660,32 @@ bool mysql_stmt_prepare(THD *thd, char *packet, uint packet_length)
   DBUG_ENTER("mysql_stmt_prepare");
 
   bzero((char*) &stmt, sizeof(stmt));
-  stmt.thd= thd;
+  
   stmt.stmt_id= ++thd->current_stmt_id;
   init_sql_alloc(&stmt.mem_root, 8192, 8192);
+  
+  stmt.thd= thd;
+  stmt.thd->mem_root= stmt.mem_root;
 
-  thd->mem_root= stmt.mem_root;
-  if (alloc_query(thd, packet, packet_length))
+  if (alloc_query(stmt.thd, packet, packet_length))
     goto err;
+
   if (parse_prepare_query(&stmt, thd->query, thd->query_length))
     goto err;
 
   if (!(specialflag & SPECIAL_NO_PRIOR))
     my_pthread_setprio(pthread_self(),WAIT_PRIOR);
   
-  if (init_param_items(thd, &stmt))
+  if (init_param_items(&stmt))
     goto err;
   
-  stmt.mem_root= thd->mem_root;  
+  stmt.mem_root= stmt.thd->mem_root;  
   tree_insert(&thd->prepared_statements, (void *)&stmt, 0, (void *)0);
   thd->mem_root= thd_root; // restore main mem_root
   DBUG_RETURN(0);
 
 err:
-  stmt.mem_root= thd->mem_root;
+  stmt.mem_root= stmt.thd->mem_root;  
   free_prep_stmt(&stmt, free_free, (void*) 0);
   thd->mem_root = thd_root;	// restore main mem_root
   DBUG_RETURN(1);
@@ -727,9 +731,9 @@ void mysql_stmt_execute(THD *thd, char *packet)
     mysql_delete(), mysql_update() and mysql_select() to not to 
     have re-check on setup_* and other things ..
   */  
-  thd->protocol= &thd->protocol_prep;		// Switch to binary protocol
+  stmt->thd->protocol= &thd->protocol_prep;		// Switch to binary protocol
   mysql_execute_command(stmt->thd);
-  thd->protocol= &thd->protocol_simple;		// Use normal protocol
+  stmt->thd->protocol= &thd->protocol_simple;		// Use normal protocol
 
   if (!(specialflag & SPECIAL_NO_PRIOR))
     my_pthread_setprio(pthread_self(), WAIT_PRIOR);