Merge mskold@bk-internal.mysql.com:/home/bk/mysql-5.0

into  mysql.com:/windows/Linux_space/MySQL/mysql-5.0-ndb


ndb/src/kernel/blocks/cmvmi/Cmvmi.cpp:
  Auto merged
ndb/tools/ndb_config.cpp:
  Auto merged
sql/ha_ndbcluster.cc:
  Auto merged

mysql-test/r/ndb_index_unique.result

@@ -140,7 +140,40 @@ b int unsigned not null,
 c int unsigned,
 UNIQUE USING HASH (b, c)	
 ) engine=ndbcluster;
-ERROR 42000: Column 'c' is used with UNIQUE or INDEX but is not defined as NOT NULL
+Warnings:
+Warning	1121	Ndb does not support unique index on NULL valued attributes, index access with NULL value will become full table scan
+insert t2 values(1,1,NULL),(2,2,2),(3,3,NULL),(4,4,4),(5,5,NULL),(6,6,6),(7,7,NULL),(8,3,NULL),(9,3,NULL);
+select * from t2 where c IS NULL order by a;
+a	b	c
+1	1	NULL
+3	3	NULL
+5	5	NULL
+7	7	NULL
+8	3	NULL
+9	3	NULL
+select * from t2 where b = 3 AND c IS NULL order by a;
+a	b	c
+3	3	NULL
+8	3	NULL
+9	3	NULL
+select * from t2 where (b = 3 OR b = 5) AND c IS NULL order by a;
+a	b	c
+3	3	NULL
+5	5	NULL
+8	3	NULL
+9	3	NULL
+set @old_ecpd = @@session.engine_condition_pushdown;
+set engine_condition_pushdown = true;
+explain select * from t2 where (b = 3 OR b = 5) AND c IS NULL AND a < 9 order by a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t2	range	PRIMARY,b	PRIMARY	4	NULL	1	Using where with pushed condition
+select * from t2 where (b = 3 OR b = 5) AND c IS NULL AND a < 9 order by a;
+a	b	c
+3	3	NULL
+5	5	NULL
+8	3	NULL
+set engine_condition_pushdown = @old_ecpd;
+drop table t2;
 CREATE TABLE t3 (
 a int unsigned NOT NULL,
 b int unsigned not null,

mysql-test/r/ndb_update.result

@@ -17,8 +17,17 @@ pk1	b	c
 0	0	0
 2	2	2
 4	1	1
+UPDATE t1 set pk1 = 4 where pk1 = 2;
+ERROR 23000: Duplicate entry '4' for key 1
+UPDATE IGNORE t1 set pk1 = 4 where pk1 = 2;
+select * from t1 order by pk1;
+pk1	b	c
+0	0	0
+2	2	2
+4	1	1
 UPDATE t1 set pk1 = 1, c = 2 where pk1 = 4;
 ERROR 23000: Duplicate entry '' for key 0
+UPDATE IGNORE t1 set pk1 = 1, c = 2 where pk1 = 4;
 select * from t1 order by pk1;
 pk1	b	c
 0	0	0

mysql-test/t/ndb_index_unique.test

@@ -85,7 +85,6 @@ select * from t2 order by a;
 
 drop table t2;
 
--- error 1121
 CREATE TABLE t2 (
   a int unsigned NOT NULL PRIMARY KEY,
   b int unsigned not null,
@@ -93,6 +92,20 @@ CREATE TABLE t2 (
   UNIQUE USING HASH (b, c)	
 ) engine=ndbcluster;
 
+
+insert t2 values(1,1,NULL),(2,2,2),(3,3,NULL),(4,4,4),(5,5,NULL),(6,6,6),(7,7,NULL),(8,3,NULL),(9,3,NULL);
+
+select * from t2 where c IS NULL order by a;
+select * from t2 where b = 3 AND c IS NULL order by a;
+select * from t2 where (b = 3 OR b = 5) AND c IS NULL order by a;
+set @old_ecpd = @@session.engine_condition_pushdown;
+set engine_condition_pushdown = true;
+explain select * from t2 where (b = 3 OR b = 5) AND c IS NULL AND a < 9 order by a;
+select * from t2 where (b = 3 OR b = 5) AND c IS NULL AND a < 9 order by a;
+set engine_condition_pushdown = @old_ecpd;
+
+drop table t2;
+
 #
 # Show use of PRIMARY KEY USING HASH indexes 
 #

mysql-test/t/ndb_update.test

@@ -23,8 +23,13 @@ UPDATE t1 set b = c;
 select * from t1 order by pk1;
 UPDATE t1 set pk1 = 4 where pk1 = 1;
 select * from t1 order by pk1;
+--error 1062
+UPDATE t1 set pk1 = 4 where pk1 = 2;
+UPDATE IGNORE t1 set pk1 = 4 where pk1 = 2;
+select * from t1 order by pk1;
 -- error 1062
 UPDATE t1 set pk1 = 1, c = 2 where pk1 = 4;
+UPDATE IGNORE t1 set pk1 = 1, c = 2 where pk1 = 4;
 select * from t1 order by pk1;
 UPDATE t1 set pk1 = pk1 + 10;
 select * from t1 order by pk1;

ndb/src/common/util/InputStream.cpp

@@ -65,6 +65,5 @@ SocketInputStream::gets(char * buf, int bufLen) {
 
   if(res == -1)
     return 0;
-
   return buf;
 }

ndb/src/common/util/socket_io.cpp

@@ -53,10 +53,6 @@ readln_socket(NDB_SOCKET_TYPE socket, int timeout_millis,
   if(buflen <= 1)
     return 0;
 
-  int sock_flags= fcntl(socket, F_GETFL);
-  if(fcntl(socket, F_SETFL, sock_flags | O_NONBLOCK) == -1)
-    return -1;
-
   fd_set readset;
   FD_ZERO(&readset);
   FD_SET(socket, &readset);
@@ -71,43 +67,70 @@ readln_socket(NDB_SOCKET_TYPE socket, int timeout_millis,
   }
 
   if(selectRes == -1){
-    fcntl(socket, F_SETFL, sock_flags);
     return -1;
   }
 
-  const int t = recv(socket, buf, buflen, MSG_PEEK);
-
-  if(t < 1)
+  char* ptr = buf;
+  int len = buflen;
+  do
   {
-    fcntl(socket, F_SETFL, sock_flags);
-    return -1;
-  }
+    int t;
+    while((t = recv(socket, ptr, len, MSG_PEEK)) == -1 && errno == EINTR);
+    
+    if(t < 1)
+    {
+      return -1;
+    }
 
-  for(int i=0; i< t;i++)
-  {
-    if(buf[i] == '\n'){
-      int r= recv(socket, buf, i+1, 0);
-      buf[i+1]= 0;
-      if(r < 1) {
-        fcntl(socket, F_SETFL, sock_flags);
-        return -1;
+    
+    for(int i = 0; i<t; i++)
+    {
+      if(ptr[i] == '\n')
+      {
+	/**
+	 * Now consume
+	 */
+	for (len = 1 + i; len; )
+	{
+	  while ((t = recv(socket, ptr, len, 0)) == -1 && errno == EINTR);
+	  if (t < 1)
+	    return -1;
+	  ptr += t;
+	  len -= t;
+	}
+	if (i > 0 && buf[i-1] == '\r')
+	{
+	  buf[i-1] = '\n';
+	  ptr--;
+	}
+	ptr[0]= 0;
+	return ptr - buf;
       }
-
-      if(i > 0 && buf[i-1] == '\r'){
-        buf[i-1] = '\n';
-        buf[i]= '\0';
+    }
+    
+    for (int tmp = t; tmp; )
+    {
+      while ((t = recv(socket, ptr, tmp, 0)) == -1 && errno == EINTR);
+      if (t < 1)
+      {
+	return -1;
       }
-
-      fcntl(socket, F_SETFL, sock_flags);
-      return r;
+      ptr += t;
+      len -= t;
+      tmp -= t;
     }
-  }
 
-  int r= recv(socket, buf, t, 0);
-  if(r>=0)
-    buf[r] = 0;
-  fcntl(socket, F_SETFL, sock_flags);
-  return r;
+    FD_ZERO(&readset);
+    FD_SET(socket, &readset);
+    timeout.tv_sec  = (timeout_millis / 1000);
+    timeout.tv_usec = (timeout_millis % 1000) * 1000;
+    const int selectRes = select(socket + 1, &readset, 0, 0, &timeout);
+    if(selectRes != 1){
+      return -1;
+    }
+  } while (len > 0);
+  
+  return -1;
 }
 
 extern "C"

ndb/src/kernel/blocks/cmvmi/Cmvmi.cpp

@@ -697,6 +697,7 @@ Cmvmi::execTEST_ORD(Signal * signal){
       // Do nothing
       break;
     }
+    globalSignalLoggers.flushSignalLog();
   }
 
 #endif

ndb/test/ndbapi/testDict.cpp

@@ -1893,7 +1893,7 @@ runDictOps(NDBT_Context* ctx, NDBT_Step* step)
     // create indexes
     const char** indlist = NDBT_Tables::getIndexes(tabName);
     uint indnum = 0;
-    while (*indlist != 0) {
+    while (indlist != 0 && *indlist != 0) {
       uint count = 0;
     try_create_index:
       count++;

ndb/test/run-test/daily-basic-tests.txt

@@ -510,7 +510,7 @@ args: -n TemporaryTables T1 T6 T7 T8
 
 max-time: 1500
 cmd: testDict
-args: -n Restart_NR2 T1
+args: -n Restart_NR2 T1 I3
 
 #
 # TEST NDBAPI

ndb/tools/ndb_config.cpp

@@ -37,7 +37,6 @@ static int g_verbose = 0;
 static int try_reconnect = 3;
 
 static int g_nodes, g_connections, g_section;
-static const char * g_connectstring = 0;
 static const char * g_query = 0;
 
 static int g_nodeid = 0;
@@ -486,7 +485,7 @@ fetch_configuration()
 
   ndb_mgm_set_error_stream(mgm, stderr);
   
-  if (ndb_mgm_set_connectstring(mgm, g_connectstring))
+  if (ndb_mgm_set_connectstring(mgm, opt_connect_str))
   {
     fprintf(stderr, "* %5d: %s\n", 
 	    ndb_mgm_get_latest_error(mgm),

sql/ha_ndbcluster.cc

@@ -1059,6 +1059,7 @@ int ha_ndbcluster::build_index_list(Ndb *ndb, TABLE *tab, enum ILBP phase)
   int error= 0;
   const char *index_name;
   char unique_index_name[FN_LEN];
+  bool null_in_unique_index= false;
   static const char* unique_suffix= "$unique";
   KEY* key_info= tab->key_info;
   const char **key_name= tab->s->keynames.type_names;
@@ -1096,8 +1097,14 @@ int ha_ndbcluster::build_index_list(Ndb *ndb, TABLE *tab, enum ILBP phase)
           error= create_unique_index(unique_index_name, key_info);
         break;
       case UNIQUE_INDEX:
-        if (!(error= check_index_fields_not_null(i)))
-          error= create_unique_index(unique_index_name, key_info);
+	if (check_index_fields_not_null(i))
+	{
+	  push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
+			      ER_NULL_COLUMN_IN_INDEX,
+			      "Ndb does not support unique index on NULL valued attributes, index access with NULL value will become full table scan");
+	  null_in_unique_index= true;
+	}
+	error= create_unique_index(unique_index_name, key_info);
         break;
       case ORDERED_INDEX:
         error= create_ordered_index(index_name, key_info);
@@ -1129,6 +1136,11 @@ int ha_ndbcluster::build_index_list(Ndb *ndb, TABLE *tab, enum ILBP phase)
       m_index[i].unique_index= (void *) index;
       error= fix_unique_index_attr_order(m_index[i], index, key_info);
     }
+    if (idx_type == UNIQUE_INDEX && 
+	phase != ILBP_CREATE &&
+	check_index_fields_not_null(i))
+      null_in_unique_index= true;
+    m_index[i].null_in_unique_index= null_in_unique_index;
   }
   
   DBUG_RETURN(error);
@@ -1150,7 +1162,7 @@ NDB_INDEX_TYPE ha_ndbcluster::get_index_type_from_table(uint inx) const
           ORDERED_INDEX);
 } 
 
-int ha_ndbcluster::check_index_fields_not_null(uint inx)
+bool ha_ndbcluster::check_index_fields_not_null(uint inx)
 {
   KEY* key_info= table->key_info + inx;
   KEY_PART_INFO* key_part= key_info->key_part;
@@ -1161,14 +1173,10 @@ int ha_ndbcluster::check_index_fields_not_null(uint inx)
     {
       Field* field= key_part->field;
       if (field->maybe_null())
-      {
-        my_printf_error(ER_NULL_COLUMN_IN_INDEX,ER(ER_NULL_COLUMN_IN_INDEX),
-                        MYF(0),field->field_name);
-        DBUG_RETURN(ER_NULL_COLUMN_IN_INDEX);
-      }
+        DBUG_RETURN(true);
     }
   
-  DBUG_RETURN(0);
+  DBUG_RETURN(false);
 }
 
 void ha_ndbcluster::release_metadata()
@@ -1261,6 +1269,12 @@ inline NDB_INDEX_TYPE ha_ndbcluster::get_index_type(uint idx_no) const
   return m_index[idx_no].type;
 }
 
+inline bool ha_ndbcluster::has_null_in_unique_index(uint idx_no) const
+{
+  DBUG_ASSERT(idx_no < MAX_KEY);
+  return m_index[idx_no].null_in_unique_index;
+}
+
 
 /*
   Get the flags for an index
@@ -2089,6 +2103,42 @@ int ha_ndbcluster::ordered_index_scan(const key_range *start_key,
   DBUG_RETURN(next_result(buf));
 }
 
+/*
+  Unique index scan in NDB (full table scan with scan filter)
+ */
+
+int ha_ndbcluster::unique_index_scan(const KEY* key_info, 
+				     const byte *key, 
+				     uint key_len,
+				     byte *buf)
+{
+  int res;
+  NdbScanOperation *op;
+  NdbTransaction *trans= m_active_trans;
+
+  DBUG_ENTER("unique_index_scan");  
+  DBUG_PRINT("enter", ("Starting new scan on %s", m_tabname));
+
+  NdbOperation::LockMode lm=
+    (NdbOperation::LockMode)get_ndb_lock_type(m_lock.type);
+  bool need_pk = (lm == NdbOperation::LM_Read);
+  if (!(op=trans->getNdbScanOperation((const NDBTAB *) m_table)) ||
+      op->readTuples(lm, 
+		     (need_pk)?NdbScanOperation::SF_KeyInfo:0, 
+		     parallelism))
+    ERR_RETURN(trans->getNdbError());
+  m_active_cursor= op;
+  if (generate_scan_filter_from_key(op, key_info, key, key_len, buf))
+    DBUG_RETURN(ndb_err(trans));
+  if ((res= define_read_attrs(buf, op)))
+    DBUG_RETURN(res);
+
+  if (execute_no_commit(this,trans,false) != 0)
+    DBUG_RETURN(ndb_err(trans));
+  DBUG_PRINT("exit", ("Scan started successfully"));
+  DBUG_RETURN(next_result(buf));
+}
+
 /*
   Start full table scan in NDB
  */
@@ -2337,6 +2387,21 @@ int ha_ndbcluster::update_row(const byte *old_data, byte *new_data)
   uint i;
   DBUG_ENTER("update_row");
   
+  /*
+   * If IGNORE the ignore constraint violations on primary and unique keys
+   */
+  if (m_ignore_dup_key)
+  {
+    int peek_res= peek_indexed_rows(new_data);
+    
+    if (!peek_res) 
+    {
+      DBUG_RETURN(HA_ERR_FOUND_DUPP_KEY);
+    }
+    if (peek_res != HA_ERR_KEY_NOT_FOUND)
+      DBUG_RETURN(peek_res);
+  }
+
   statistic_increment(thd->status_var.ha_update_count, &LOCK_status);
   if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE)
   {
@@ -2763,7 +2828,7 @@ int ha_ndbcluster::index_read(byte *buf,
     }
     else if (type == UNIQUE_INDEX)
     {
-      DBUG_RETURN(1);
+      DBUG_RETURN(unique_index_scan(key_info, key, key_len, buf));
     }
     break;
   case ORDERED_INDEX:
@@ -2856,12 +2921,13 @@ int ha_ndbcluster::read_range_first_to_buf(const key_range *start_key,
                                            bool eq_r, bool sorted,
                                            byte* buf)
 {
-  KEY* key_info;
+   ndb_index_type type= get_index_type(active_index);
+KEY* key_info;
   int error= 1; 
   DBUG_ENTER("ha_ndbcluster::read_range_first_to_buf");
   DBUG_PRINT("info", ("eq_r: %d, sorted: %d", eq_r, sorted));
 
-  switch (get_index_type(active_index)){
+  switch (type){
   case PRIMARY_KEY_ORDERED_INDEX:
   case PRIMARY_KEY_INDEX:
     key_info= table->key_info + active_index;
@@ -2887,6 +2953,14 @@ int ha_ndbcluster::read_range_first_to_buf(const key_range *start_key,
       error= unique_index_read(start_key->key, start_key->length, buf);
       DBUG_RETURN(error == HA_ERR_KEY_NOT_FOUND ? HA_ERR_END_OF_FILE : error);
     }
+    else if (type == UNIQUE_INDEX)
+    {
+      error= unique_index_scan(key_info, 
+			       start_key->key, 
+			       start_key->length, 
+			       buf);
+      DBUG_RETURN(error == HA_ERR_KEY_NOT_FOUND ? HA_ERR_END_OF_FILE : error);
+    }
     break;
   default:
     break;
@@ -6117,6 +6191,30 @@ ha_ndbcluster::release_completed_operations(NdbTransaction *trans,
   trans->releaseCompletedOperations();
 }
 
+bool 
+ha_ndbcluster::null_value_index_search(KEY_MULTI_RANGE *ranges,
+				       KEY_MULTI_RANGE *end_range,
+				       HANDLER_BUFFER *buffer)
+{
+  DBUG_ENTER("null_value_index_search");
+  KEY* key_info= table->key_info + active_index;
+  KEY_MULTI_RANGE *range= ranges;
+  ulong reclength= table->s->reclength;
+  byte *curr= (byte*)buffer->buffer;
+  byte *end_of_buffer= (byte*)buffer->buffer_end;
+  
+  for (; range<end_range && curr+reclength <= end_of_buffer; 
+       range++)
+  {
+    const byte *key= range->start_key.key;
+    uint key_len= range->start_key.length;
+    if (check_null_in_key(key_info, key, key_len))
+      DBUG_RETURN(true);
+    curr += reclength;
+  }
+  DBUG_RETURN(false);
+}
+
 int
 ha_ndbcluster::read_multi_range_first(KEY_MULTI_RANGE **found_range_p,
                                       KEY_MULTI_RANGE *ranges, 
@@ -6133,11 +6231,14 @@ ha_ndbcluster::read_multi_range_first(KEY_MULTI_RANGE **found_range_p,
   NdbOperation* op;
   Thd_ndb *thd_ndb= get_thd_ndb(current_thd);
 
-  if (uses_blob_value(m_retrieve_all_fields))
+  /**
+   * blobs and unique hash index with NULL can't be batched currently
+   */
+  if (uses_blob_value(m_retrieve_all_fields) ||
+      (index_type ==  UNIQUE_INDEX &&
+       has_null_in_unique_index(active_index) &&
+       null_value_index_search(ranges, ranges+range_count, buffer)))
   {
-    /**
-     * blobs can't be batched currently
-     */
     m_disable_multi_read= TRUE;
     DBUG_RETURN(handler::read_multi_range_first(found_range_p, 
                                                 ranges, 
@@ -6193,7 +6294,6 @@ ha_ndbcluster::read_multi_range_first(KEY_MULTI_RANGE **found_range_p,
       goto range;
       /* fall through */
     case PRIMARY_KEY_INDEX:
-    {
       multi_range_curr->range_flag |= UNIQUE_RANGE;
       if ((op= m_active_trans->getNdbOperation(tab)) && 
           !op->readTuple(lm) && 
@@ -6204,8 +6304,6 @@ ha_ndbcluster::read_multi_range_first(KEY_MULTI_RANGE **found_range_p,
       else
         ERR_RETURN(op ? op->getNdbError() : m_active_trans->getNdbError());
       break;
-    }
-    break;
     case UNIQUE_ORDERED_INDEX:
       if (!(multi_range_curr->start_key.length == key_info->key_length &&
             multi_range_curr->start_key.flag == HA_READ_KEY_EXACT &&
@@ -6214,18 +6312,16 @@ ha_ndbcluster::read_multi_range_first(KEY_MULTI_RANGE **found_range_p,
       goto range;
       /* fall through */
     case UNIQUE_INDEX:
-    {
       multi_range_curr->range_flag |= UNIQUE_RANGE;
       if ((op= m_active_trans->getNdbIndexOperation(unique_idx, tab)) && 
-          !op->readTuple(lm) && 
-          !set_index_key(op, key_info, multi_range_curr->start_key.key) &&
-          !define_read_attrs(curr, op) &&
-          (op->setAbortOption(AO_IgnoreError), TRUE))
-        curr += reclength;
+	  !op->readTuple(lm) && 
+	  !set_index_key(op, key_info, multi_range_curr->start_key.key) &&
+	  !define_read_attrs(curr, op) &&
+	  (op->setAbortOption(AO_IgnoreError), TRUE))
+	curr += reclength;
       else
-        ERR_RETURN(op ? op->getNdbError() : m_active_trans->getNdbError());
+	ERR_RETURN(op ? op->getNdbError() : m_active_trans->getNdbError());
       break;
-    }
     case ORDERED_INDEX:
     {
   range:
@@ -7968,31 +8064,12 @@ ha_ndbcluster::generate_scan_filter(Ndb_cond_stack *ndb_cond_stack,
                                     NdbScanOperation *op)
 {
   DBUG_ENTER("generate_scan_filter");
+
   if (ndb_cond_stack)
   {
-    DBUG_PRINT("info", ("Generating scan filter"));
     NdbScanFilter filter(op);
-    bool multiple_cond= FALSE;
-    // Wrap an AND group around multiple conditions
-    if (ndb_cond_stack->next) {
-      multiple_cond= TRUE;
-      if (filter.begin() == -1)
-        DBUG_RETURN(1); 
-    }
-    for (Ndb_cond_stack *stack= ndb_cond_stack; 
-         (stack); 
-         stack= stack->next)
-      {
-        Ndb_cond *cond= stack->ndb_cond;
-
-        if (build_scan_filter(cond, &filter))
-        {
-          DBUG_PRINT("info", ("build_scan_filter failed"));
-          DBUG_RETURN(1);
-        }
-      }
-    if (multiple_cond && filter.end() == -1)
-      DBUG_RETURN(1);
+    
+    DBUG_RETURN(generate_scan_filter_from_cond(ndb_cond_stack, filter));
   }
   else
   {  
@@ -8002,6 +8079,88 @@ ha_ndbcluster::generate_scan_filter(Ndb_cond_stack *ndb_cond_stack,
   DBUG_RETURN(0);
 }
 
+int
+ha_ndbcluster::generate_scan_filter_from_cond(Ndb_cond_stack *ndb_cond_stack,
+					      NdbScanFilter& filter)
+{
+  DBUG_ENTER("generate_scan_filter_from_cond");
+  bool multiple_cond= FALSE;
+  
+  DBUG_PRINT("info", ("Generating scan filter"));
+  // Wrap an AND group around multiple conditions
+  if (ndb_cond_stack->next) 
+  {
+    multiple_cond= TRUE;
+    if (filter.begin() == -1)
+      DBUG_RETURN(1); 
+  }
+  for (Ndb_cond_stack *stack= ndb_cond_stack; 
+       (stack); 
+       stack= stack->next)
+  {
+    Ndb_cond *cond= stack->ndb_cond;
+    
+    if (build_scan_filter(cond, &filter))
+    {
+      DBUG_PRINT("info", ("build_scan_filter failed"));
+      DBUG_RETURN(1);
+    }
+  }
+  if (multiple_cond && filter.end() == -1)
+    DBUG_RETURN(1);
+
+  DBUG_RETURN(0);
+}
+
+int ha_ndbcluster::generate_scan_filter_from_key(NdbScanOperation *op,
+						 const KEY* key_info, 
+						 const byte *key, 
+						 uint key_len,
+						 byte *buf)
+{
+  KEY_PART_INFO* key_part= key_info->key_part;
+  KEY_PART_INFO* end= key_part+key_info->key_parts;
+  NdbScanFilter filter(op);
+  int res;
+
+  DBUG_ENTER("generate_scan_filter_from_key");
+  filter.begin(NdbScanFilter::AND);
+  for (; key_part != end; key_part++) 
+  {
+    Field* field= key_part->field;
+    uint32 pack_len= field->pack_length();
+    const byte* ptr= key;
+    char buf[256];
+    DBUG_PRINT("info", ("Filtering value for %s", field->field_name));
+    DBUG_DUMP("key", (char*)ptr, pack_len);
+    if (key_part->null_bit)
+    {
+      DBUG_PRINT("info", ("Generating ISNULL filter"));
+      if (filter.isnull(key_part->fieldnr-1) == -1)
+	DBUG_RETURN(1);
+    }
+    else
+    {
+      DBUG_PRINT("info", ("Generating EQ filter"));
+      if (filter.cmp(NdbScanFilter::COND_EQ, 
+		     key_part->fieldnr-1,
+		     ptr,
+		     pack_len) == -1)
+	DBUG_RETURN(1);
+    }
+    key += key_part->store_length;
+  }      
+  // Add any pushed condition
+  if (m_cond_stack &&
+      (res= generate_scan_filter_from_cond(m_cond_stack, filter)))
+    DBUG_RETURN(res);
+    
+  if (filter.end() == -1)
+    DBUG_RETURN(1);
+
+  DBUG_RETURN(0);
+}
+
 int
 ndbcluster_show_status(THD* thd)
 {

sql/ha_ndbcluster.h

@@ -56,6 +56,7 @@ typedef struct ndb_index_data {
   void *index;
   void *unique_index;
   unsigned char *unique_index_attrid_map;
+  bool null_in_unique_index;
 } NDB_INDEX_DATA;
 
 typedef struct st_ndbcluster_share {
@@ -546,7 +547,9 @@ class ha_ndbcluster: public handler
                              KEY_MULTI_RANGE*ranges, uint range_count,
                              bool sorted, HANDLER_BUFFER *buffer);
   int read_multi_range_next(KEY_MULTI_RANGE **found_range_p);
-
+  bool null_value_index_search(KEY_MULTI_RANGE *ranges,
+			       KEY_MULTI_RANGE *end_range,
+			       HANDLER_BUFFER *buffer);
   bool get_error_message(int error, String *buf);
   int info(uint);
   int extra(enum ha_extra_function operation);
@@ -649,7 +652,8 @@ private:
   void release_metadata();
   NDB_INDEX_TYPE get_index_type(uint idx_no) const;
   NDB_INDEX_TYPE get_index_type_from_table(uint index_no) const;
-  int check_index_fields_not_null(uint index_no);
+  bool has_null_in_unique_index(uint idx_no) const;
+  bool check_index_fields_not_null(uint index_no);
 
   int pk_read(const byte *key, uint key_len, byte *buf);
   int complemented_pk_read(const byte *old_data, byte *new_data);
@@ -663,6 +667,11 @@ private:
   int ordered_index_scan(const key_range *start_key,
                          const key_range *end_key,
                          bool sorted, bool descending, byte* buf);
+  int unique_index_scan(const KEY* key_info, 
+			const byte *key, 
+			uint key_len,
+			byte *buf);
+
   int full_table_scan(byte * buf);
   int fetch_next(NdbScanOperation* op);
   int next_result(byte *buf); 
@@ -725,6 +734,13 @@ bool uses_blob_value(bool all_fields);
   int build_scan_filter(Ndb_cond* &cond, NdbScanFilter* filter);
   int generate_scan_filter(Ndb_cond_stack* cond_stack, 
                            NdbScanOperation* op);
+  int generate_scan_filter_from_cond(Ndb_cond_stack* cond_stack, 
+				     NdbScanFilter& filter);
+  int generate_scan_filter_from_key(NdbScanOperation* op,
+                                   const KEY* key_info, 
+                                   const byte *key, 
+                                   uint key_len,
+                                   byte *buf);
 
   friend int execute_commit(ha_ndbcluster*, NdbTransaction*);
   friend int execute_no_commit(ha_ndbcluster*, NdbTransaction*, bool);