wl2126 - ndb - Enable read_multi_range batching also for range scan(s)

 +fix mysql code style
 +adopt to interface changes by ingo


sql/ha_ndbcluster.cc:
  Enable read_multi_range batching also for range scan(s)
   +fix mysql code style
   +adopt to interface changes by ingo
sql/ha_ndbcluster.h:
  Enable read_multi_range batching also for range scan(s)
   +fix mysql code style
   +adopt to interface changes by ingo

sql/ha_ndbcluster.cc

@@ -4715,7 +4715,7 @@ ha_ndbcluster::read_multi_range_first(key_multi_range **found_range_p,
   ulong reclength = table->reclength;
   NdbOperation* op;
 
-  if(uses_blob_value(m_retrieve_all_fields))
+  if (uses_blob_value(m_retrieve_all_fields))
   {
     /**
      * blobs can't be batched currently
@@ -4728,62 +4728,28 @@ ha_ndbcluster::read_multi_range_first(key_multi_range **found_range_p,
 						buffer));
   }
 
-  switch(index_type){
-  case UNIQUE_INDEX:
-  case PRIMARY_KEY_INDEX:
-    break;
-  case PRIMARY_KEY_ORDERED_INDEX:
-  case UNIQUE_ORDERED_INDEX:
-    /**
-     * Currently not supported on ordered indexes
-     */
-    for(i= 0; i<range_count; i++)
-    {
-      if (ranges[i].start_key.length == key_info->key_length &&
-	  ranges[i].start_key.flag == HA_READ_KEY_EXACT)
-	continue;
-
-      /**
-       * Mark that we using hander:: implementation
-       */
-      m_disable_multi_read= true;
-      DBUG_RETURN(handler::read_multi_range_first(found_range_p, 
-						  ranges, 
-						  range_count,
-						  sorted, 
-						  buffer));
-    }
-    break;
-  default:
-  case ORDERED_INDEX:
-    m_disable_multi_read= true;
-    DBUG_RETURN(handler::read_multi_range_first(found_range_p, 
-						ranges, 
-						range_count,
-						sorted, 
-						buffer));
-  }
-  
   m_disable_multi_read= false;
   
   multi_ranges= ranges;
   multi_range_count= range_count;
   multi_range_sorted= sorted;
+  const NDBINDEX *idx= (NDBINDEX *) m_index[active_index].index; 
   multi_range_buffer= buffer;
-  multi_range_found_p= found_range_p;
 
-  byte* curr = buffer->buffer;
+  byte* curr= (byte*)buffer->buffer;
   NdbOperation::LockMode lm= 
     (NdbOperation::LockMode)get_ndb_lock_type(m_lock.type);
   const NDBTAB *tab= (const NDBTAB *) m_table;
   const NDBINDEX *unique_idx= (NDBINDEX *) m_index[active_index].unique_index;
-  const NdbOperation* lastOp = m_active_trans->getLastDefinedOperation();
-
-  switch(index_type){
-  case PRIMARY_KEY_INDEX:
-  case PRIMARY_KEY_ORDERED_INDEX:
-    for(i= 0; i<range_count && curr+reclength <= buffer->buffer_end; i++)
+  const NdbOperation* lastOp= m_active_trans->getLastDefinedOperation();
+  NdbIndexScanOperation* scanOp= 0;
+  for(i= 0; i<range_count && curr+reclength <= buffer->buffer_end; i++)
+  {
+    switch(index_type){
+    case PRIMARY_KEY_INDEX:
+  pk:
     {
+      ranges[i].range_flag |= UNIQUE_RANGE;
       if ((op= m_active_trans->getNdbOperation(tab)) && 
 	  !op->readTuple(lm) && 
 	  !set_primary_key(op, ranges[i].start_key.key) &&
@@ -4792,12 +4758,13 @@ ha_ndbcluster::read_multi_range_first(key_multi_range **found_range_p,
 	curr += reclength;
       else
 	ERR_RETURN(op ? op->getNdbError() : m_active_trans->getNdbError());
+      break;
     }
     break;
-  case UNIQUE_INDEX:
-  case UNIQUE_ORDERED_INDEX:
-    for(i= 0; i<range_count && curr+reclength <= buffer->buffer_end; i++)
+    case UNIQUE_INDEX:
+  sk:
     {
+      ranges[i].range_flag |= UNIQUE_RANGE;
       if ((op= m_active_trans->getNdbIndexOperation(unique_idx, tab)) && 
 	  !op->readTuple(lm) && 
 	  !set_primary_key(op, ranges[i].start_key.key) &&
@@ -4806,12 +4773,54 @@ ha_ndbcluster::read_multi_range_first(key_multi_range **found_range_p,
 	curr += reclength;
       else
 	ERR_RETURN(op ? op->getNdbError() : m_active_trans->getNdbError());
+      break;
+    }
+    case PRIMARY_KEY_ORDERED_INDEX:
+      if (ranges[i].start_key.length == key_info->key_length &&
+	  ranges[i].start_key.flag == HA_READ_KEY_EXACT)
+	goto pk;
+      goto range;
+    case UNIQUE_ORDERED_INDEX:
+      if (ranges[i].start_key.length == key_info->key_length &&
+	  ranges[i].start_key.flag == HA_READ_KEY_EXACT)
+	goto sk;
+      goto range;
+    case ORDERED_INDEX:
+  range:
+      ranges[i].range_flag &= ~(uint)UNIQUE_RANGE;
+      if (sorted && scanOp != 0 && curr != buffer->buffer)
+      {
+	/**
+	 * We currently don't support batching of ordered range scans
+	 */
+	curr= (byte*)buffer->buffer_end;
+	break;
+      }
+      if (scanOp == 0)
+      {
+	if ((scanOp= m_active_trans->getNdbIndexScanOperation(idx, tab)) &&
+	   (m_active_cursor= scanOp->readTuples(lm, 0, parallelism, sorted)) &&
+	   !define_read_attrs(curr, scanOp))
+	  curr += reclength;
+	else
+	  ERR_RETURN(scanOp ? 
+		     scanOp->getNdbError() : 
+		     m_active_trans->getNdbError());
+      }
+      else
+      {
+	scanOp->set_new_bound();
+      }
+      const key_range *keys[2]= { &ranges[i].start_key, &ranges[i].end_key };
+      if ((res= set_bounds(scanOp, keys)))
+	DBUG_RETURN(res);
+      break;
     }
   }
   
-  if(i != range_count)
+  if (i != range_count)
   {
-    buffer->end_of_used_area= buffer->buffer_end;
+    buffer->end_of_used_area= (byte*)buffer->buffer_end;
   }
   else
   {
@@ -4823,60 +4832,78 @@ ha_ndbcluster::read_multi_range_first(key_multi_range **found_range_p,
    */
   m_current_multi_operation= 
     lastOp ? lastOp->next() : m_active_trans->getFirstDefinedOperation();
-  if(!(res= execute_no_commit_ie(this, m_active_trans)))
+  if (!(res= execute_no_commit_ie(this, m_active_trans)))
   {
     multi_range_curr= 0;
-    m_multi_range_result_ptr= buffer->buffer;
-    DBUG_RETURN(read_multi_range_next());
+    m_multi_range_defined_count= i;
+    m_multi_range_result_ptr= (byte*)buffer->buffer;
+    DBUG_RETURN(read_multi_range_next(found_range_p));
   }
   ERR_RETURN(m_active_trans->getNdbError());
 }
 
 int
-ha_ndbcluster::read_multi_range_next()
+ha_ndbcluster::read_multi_range_next(key_multi_range ** multi_range_found_p)
 {
   DBUG_ENTER("ha_ndbcluster::read_multi_range_next");
-  if(m_disable_multi_read)
-    DBUG_RETURN(handler::read_multi_range_next());
-  
-  ulong reclength = table->reclength;
-  const NdbOperation* op = m_current_multi_operation;
-  while(multi_range_curr < multi_range_count && op && op->getNdbError().code)
-  {
-    multi_range_curr++;
-    op = m_active_trans->getNextCompletedOperation(op);
-    m_multi_range_result_ptr += reclength;
-  }
+  if (m_disable_multi_read)
+    DBUG_RETURN(handler::read_multi_range_next(multi_range_found_p));
   
-  if(multi_range_curr < multi_range_count && op)
+  int res;
+  ulong reclength= table->reclength;
+  const NdbOperation* op= m_current_multi_operation;
+  while(multi_range_curr < m_multi_range_defined_count)
   {
-    * multi_range_found_p= multi_ranges + multi_range_curr;
-    memcpy(table->record[0], m_multi_range_result_ptr, reclength);
-    unpack_record(table->record[0]);
-    table->status= 0;     
+    if(multi_ranges[multi_range_curr].range_flag & UNIQUE_RANGE)
+    {
+      if(op->getNdbError().code == 0)
+	goto found_next;
+      
+      op= m_active_trans->getNextCompletedOperation(op);
+      multi_range_curr++;
+      m_multi_range_result_ptr += reclength;
+    } 
+    else if(m_active_cursor)
+    {
+      if(m_active_cursor->nextResult())
+	goto found;
 
-    /**
-     * Move to next
-     */
-    multi_range_curr++;
-    m_current_multi_operation = m_active_trans->getNextCompletedOperation(op);
-    m_multi_range_result_ptr += reclength;
-    DBUG_RETURN(0);
-  }
+      multi_range_curr++;
+      m_multi_range_result_ptr += reclength;
 
-  if(multi_range_curr == multi_range_count)
-  {
+      m_active_cursor->close();
+      m_active_cursor= 0;
+    }
+    else
+    {
+      multi_range_curr++;      
+    }
+  }  
+  
+  if (multi_range_curr == multi_range_count)
     DBUG_RETURN(HA_ERR_END_OF_FILE);
-  }
+  
   /**
    * Read remaining ranges
    */
-  uint left = multi_range_count - multi_range_curr;
+  uint left= multi_range_count - multi_range_curr;
   DBUG_RETURN(read_multi_range_first(multi_range_found_p, 
 				     multi_ranges + multi_range_curr,
 				     left, 
 				     multi_range_sorted,
 				     multi_range_buffer));
+  
+found_next:
+  multi_range_curr++;
+  op= m_active_trans->getNextCompletedOperation(op);
+  m_multi_range_result_ptr += reclength;
+  
+found:
+  * multi_range_found_p= multi_ranges + multi_range_curr;
+  memcpy(table->record[0], m_multi_range_result_ptr, reclength);
+  unpack_record(table->record[0]);
+  table->status= 0;     
+  DBUG_RETURN(0);
 }
 
 #endif /* HAVE_NDBCLUSTER_DB */

sql/ha_ndbcluster.h

@@ -117,7 +117,7 @@ class ha_ndbcluster: public handler
   int read_multi_range_first(key_multi_range **found_range_p,
 			     key_multi_range *ranges, uint range_count,
 			     bool sorted, handler_buffer *buffer);
-  int read_multi_range_next(void);
+  int read_multi_range_next(key_multi_range **found_range_p);
 
   bool get_error_message(int error, String *buf);
   void info(uint);
@@ -256,6 +256,7 @@ class ha_ndbcluster: public handler
 
   bool m_disable_multi_read;
   byte* m_multi_range_result_ptr;
+  uint m_multi_range_defined_count;
   const NdbOperation* m_current_multi_operation;
   
   void set_rec_per_key();