bzr push into mysql-5.1-telco-7.0-spj-scan-vs-scan branch (ole.john.aske:3530 to 3531)

[Ole John Aske]

 3531 Ole John Aske	2011-08-15 [merge]
      Merge

    modified:
      storage/ndb/src/ndbapi/NdbQueryOperation.cpp
 3530 Ole John Aske	2011-08-15 [merge]
      merge

    modified:
      mysql-test/suite/ndb_rpl/t/ndb_rpl_conflict_epoch.cnf
      storage/ndb/src/ndbapi/NdbQueryOperation.cpp
=== modified file 'storage/ndb/src/ndbapi/NdbQueryOperation.cpp'
--- a/storage/ndb/src/ndbapi/NdbQueryOperation.cpp	2011-08-15 12:27:33 +0000
+++ b/storage/ndb/src/ndbapi/NdbQueryOperation.cpp	2011-08-15 12:38:54 +0000
@@ -201,6 +201,9 @@ public:
   NdbResultStream& getResultStream(Uint32 operationNo) const
   { return m_query->getQueryOperation(operationNo).getResultStream(m_fragNo); }
   
+  Uint32 getReceiverId() const;
+  Uint32 getReceiverTcPtrI() const;
+
   /**
    * @return True if there are no more batches to be received for this fragment.
    */
@@ -876,8 +879,7 @@ void NdbRootFragment::buildReciverIdMap(
 {
   for(Uint32 fragNo = 0; fragNo < noOfFrags; fragNo++)
   {
-    const Uint32 receiverId = 
-      frags[fragNo].getResultStream(0).getReceiver().getId();
+    const Uint32 receiverId = frags[fragNo].getReceiverId();
     /** 
      * For reasons unknow, NdbObjectIdMap shifts ids two bits to the left,
      * so we must do the opposite to get a good hash distribution.
@@ -890,6 +892,7 @@ void NdbRootFragment::buildReciverIdMap(
   } 
 }
 
+//static
 NdbRootFragment* 
 NdbRootFragment::receiverIdLookup(NdbRootFragment* frags, 
                                   Uint32 noOfFrags, 
@@ -903,9 +906,7 @@ NdbRootFragment::receiverIdLookup(NdbRoo
   const int hash = (receiverId >> 2) % noOfFrags;
   int current = frags[hash].m_idMapHead;
   assert(current < static_cast<int>(noOfFrags));
-  while (current >= 0 && 
-         frags[current].getResultStream(0).getReceiver().getId() 
-         != receiverId)
+  while (current >= 0 && frags[current].getReceiverId() != receiverId)
   {
     current = frags[current].m_idMapNext;
     assert(current < static_cast<int>(noOfFrags));
@@ -958,14 +959,31 @@ void NdbRootFragment::setConfReceived()
 
 bool NdbRootFragment::finalBatchReceived() const
 {
-  return getResultStream(0).getReceiver().m_tcPtrI==RNIL;
+  return getReceiverTcPtrI()==RNIL;
 }
 
-bool  NdbRootFragment::isEmpty() const
+bool NdbRootFragment::isEmpty() const
 { 
   return getResultStream(0).isEmpty();
 }
 
+/**
+ * SPJ requests are identified by the receiver-id of the
+ * *root* ResultStream for each RootFragment. Furthermore
+ * a NEXTREQ use the tcPtrI saved in this ResultStream to
+ * identify the 'cursor' to restart.
+ *
+ * We provide some convenient accessors for fetching this info 
+ */
+Uint32 NdbRootFragment::getReceiverId() const
+{
+  return getResultStream(0).getReceiver().getId();
+}
+
+Uint32 NdbRootFragment::getReceiverTcPtrI() const
+{
+  return getResultStream(0).getReceiver().m_tcPtrI;
+}
 
 ///////////////////////////////////////////
 /////////  NdbQuery API methods ///////////
@@ -2494,11 +2512,13 @@ class InitialReceiverIdIterator: public 
 {
 public:
   
-  InitialReceiverIdIterator(const NdbQueryImpl& query)
-    :m_query(query),
+  InitialReceiverIdIterator(NdbRootFragment rootFrags[],
+                            Uint32 cnt)
+    :m_rootFrags(rootFrags),
+     m_fragCount(cnt),
      m_currFragNo(0)
   {}
-  
+
   virtual ~InitialReceiverIdIterator() {};
   
   /**
@@ -2519,8 +2539,11 @@ private:
    * improving efficiency.
    */
   static const Uint32 bufSize = 16;
-  /** The query with the scan root operation that we list receiver ids for.*/
-  const NdbQueryImpl& m_query;
+
+  /** Set of root fragments which we want to itterate receiver ids for.*/
+  NdbRootFragment* m_rootFrags;
+  const Uint32 m_fragCount;
+
   /** The next fragment numnber to be processed. (Range for 0 to no of 
    * fragments.)*/
   Uint32 m_currFragNo;
@@ -2530,25 +2553,25 @@ private:
 
 const Uint32* InitialReceiverIdIterator::getNextWords(Uint32& sz)
 {
-  sz = 0;
   /**
    * For the initial batch, we want to retrieve one batch for each fragment
    * whether it is a sorted scan or not.
    */
-  if (m_currFragNo >= m_query.getRootFragCount())
+  if (m_currFragNo >= m_fragCount)
   {
+    sz = 0;
     return NULL;
   }
   else
   {
-    const NdbQueryOperationImpl& root = m_query.getQueryOperation(0U);
-    while (sz < bufSize && 
-           m_currFragNo < m_query.getRootFragCount())
+    Uint32 cnt = 0;
+    while (cnt < bufSize && m_currFragNo < m_fragCount)
     {
-      m_receiverIds[sz] = root.getReceiver(m_currFragNo).getId();
-      sz++;
+      m_receiverIds[cnt] = m_rootFrags[m_currFragNo].getReceiverId();
+      cnt++;
       m_currFragNo++;
     }
+    sz = cnt;
     return m_receiverIds;
   }
 }
@@ -2690,7 +2713,7 @@ NdbQueryImpl::doSend(int nodeId, bool la
      * Section 2 : Optional KEYINFO section
      */
     GenericSectionPtr secs[3];
-    InitialReceiverIdIterator receiverIdIter(*this);
+    InitialReceiverIdIterator receiverIdIter(m_rootFrags, m_rootFragCount);
     LinearSectionIterator attrInfoIter(m_attrInfo.addr(), m_attrInfo.getSize());
     LinearSectionIterator keyInfoIter(m_keyInfo.addr(), m_keyInfo.getSize());
  
@@ -2868,8 +2891,7 @@ NdbQueryImpl::sendFetchMore(NdbRootFragm
   scanNextReq->transId2 = (Uint32) (transId >> 32);
   tSignal.setLength(ScanNextReq::SignalLength);
 
-  const uint32 receiverId = 
-    emptyFrag.getResultStream(0).getReceiver().m_tcPtrI;
+  const uint32 receiverId = emptyFrag.getReceiverTcPtrI();
   LinearSectionIterator receiverIdIter(&receiverId ,1);
 
   GenericSectionPtr secs[1];

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