ndb - bug#31482

  (re)impl. simple-read (read that releases lock just before LQHKEYCONF)
  use simple-read for blobs


storage/ndb/include/kernel/signaldata/TcKeyConf.hpp:
  rename bit
storage/ndb/include/ndbapi/NdbOperation.hpp:
  add new lock-mode
storage/ndb/src/common/debugger/signaldata/TcKeyConf.cpp:
  rename bit
storage/ndb/src/kernel/blocks/dblqh/Dblqh.hpp:
  remove aggregate
storage/ndb/src/kernel/blocks/dblqh/DblqhMain.cpp:
  impl. simple-read = normal read + release lock just before LQHKEYCONF
storage/ndb/src/kernel/blocks/dbtc/Dbtc.hpp:
  impl. simple-read = normal read + release lock just before LQHKEYCONF
storage/ndb/src/kernel/blocks/dbtc/DbtcMain.cpp:
  impl. simple-read = normal read + release lock just before LQHKEYCONF
storage/ndb/src/ndbapi/NdbBlob.cpp:
  use simple read for blobs
storage/ndb/src/ndbapi/NdbIndexOperation.cpp:
  no simple-read for ui (yet)
storage/ndb/src/ndbapi/NdbOperationDefine.cpp:
  impl. simple-read
storage/ndb/src/ndbapi/NdbOperationExec.cpp:
  impl. simple-read
storage/ndb/src/ndbapi/NdbReceiver.cpp:
  impl. simple-read
storage/ndb/src/ndbapi/NdbScanOperation.cpp:
  no simple-read for scan (yet)
storage/ndb/src/ndbapi/NdbTransaction.cpp:
  rename bit
storage/ndb/test/ndbapi/testBasic.cpp:
  add testcase for simlpe-read
storage/ndb/test/run-test/daily-basic-tests.txt:
  add testcase
storage/ndb/test/src/HugoOperations.cpp:
  add simple-read

storage/ndb/include/kernel/signaldata/TcKeyConf.hpp

@@ -46,7 +46,7 @@ public:
    */
   STATIC_CONST( StaticLength = 5 );
   STATIC_CONST( OperationLength = 2 );
-  STATIC_CONST( SimpleReadBit = (((Uint32)1) << 31) );
+  STATIC_CONST( DirtyReadBit = (((Uint32)1) << 31) );
   
 private:
 

storage/ndb/include/ndbapi/NdbOperation.hpp

@@ -93,8 +93,9 @@ public:
     ,LM_CommittedRead       ///< Ignore locks, read last committed value
 #ifndef DOXYGEN_SHOULD_SKIP_INTERNAL
     = 2,
-    LM_Dirty = 2
+    LM_Dirty = 2,
 #endif
+    LM_SimpleRead = 3       ///< Read with shared lock, but release lock directly
   };
 
   /**

storage/ndb/src/common/debugger/signaldata/TcKeyConf.cpp

@@ -51,11 +51,11 @@ printTCKEYCONF(FILE * output, const Uint32 * theData, Uint32 len, Uint16 receive
 	    (TcKeyConf::getMarkerFlag(confInfo) == 0)?"false":"true");
     fprintf(output, "Operations:\n");
     for(i = 0; i < noOfOp; i++) {
-      if(sig->operations[i].attrInfoLen > TcKeyConf::SimpleReadBit)
+      if(sig->operations[i].attrInfoLen > TcKeyConf::DirtyReadBit)
 	fprintf(output,
 		" apiOperationPtr: H'%.8x, simplereadnode: %u\n",
 		sig->operations[i].apiOperationPtr,
-		sig->operations[i].attrInfoLen & (~TcKeyConf::SimpleReadBit));
+		sig->operations[i].attrInfoLen & (~TcKeyConf::DirtyReadBit));
       else
 	fprintf(output,
 		" apiOperationPtr: H'%.8x, attrInfoLen: %u\n",

storage/ndb/src/kernel/blocks/dblqh/Dblqh.hpp

@@ -2025,7 +2025,6 @@ public:
     Uint8 reclenAiLqhkey;
     Uint8 m_offset_current_keybuf;
     Uint8 replicaType;
-    Uint8 simpleRead;
     Uint8 seqNoReplica;
     Uint8 tcNodeFailrec;
     Uint8 m_disk_table;

storage/ndb/src/kernel/blocks/dblqh/DblqhMain.cpp

@@ -3496,7 +3496,6 @@ void Dblqh::execLQHKEYREQ(Signal* signal)
   regTcPtr->dirtyOp       = LqhKeyReq::getDirtyFlag(Treqinfo);
   regTcPtr->opExec        = LqhKeyReq::getInterpretedFlag(Treqinfo);
   regTcPtr->opSimple      = LqhKeyReq::getSimpleFlag(Treqinfo);
-  regTcPtr->simpleRead    = op == ZREAD && regTcPtr->opSimple;
   regTcPtr->seqNoReplica  = LqhKeyReq::getSeqNoReplica(Treqinfo);
   UintR TreclenAiLqhkey   = LqhKeyReq::getAIInLqhKeyReq(Treqinfo);
   regTcPtr->apiVersionNo  = 0; 
@@ -3513,9 +3512,15 @@ void Dblqh::execLQHKEYREQ(Signal* signal)
     regTcPtr->lockType = 
       op == ZREAD_EX ? ZUPDATE : (Operation_t) op == ZWRITE ? ZINSERT : (Operation_t) op;
   }
+
+  if (regTcPtr->dirtyOp)
+  {
+    ndbrequire(regTcPtr->opSimple);
+  }
   
-  CRASH_INSERTION2(5041, regTcPtr->simpleRead && 
-		   refToNode(signal->senderBlockRef()) != cownNodeid);
+  CRASH_INSERTION2(5041, (op == ZREAD && 
+                          (regTcPtr->opSimple || regTcPtr->dirtyOp) &&
+                          refToNode(signal->senderBlockRef()) != cownNodeid));
   
   regTcPtr->reclenAiLqhkey = TreclenAiLqhkey;
   regTcPtr->currReclenAi = TreclenAiLqhkey;
@@ -3687,8 +3692,8 @@ void Dblqh::execLQHKEYREQ(Signal* signal)
   Uint8 TdistKey = LqhKeyReq::getDistributionKey(TtotReclenAi);
   if ((tfragDistKey != TdistKey) &&
       (regTcPtr->seqNoReplica == 0) &&
-      (regTcPtr->dirtyOp == ZFALSE) &&
-      (regTcPtr->simpleRead == ZFALSE)) {
+      (regTcPtr->dirtyOp == ZFALSE)) 
+  {
     /* ----------------------------------------------------------------------
      * WE HAVE DIFFERENT OPINION THAN THE DIH THAT STARTED THE TRANSACTION. 
      * THE REASON COULD BE THAT THIS IS AN OLD DISTRIBUTION WHICH IS NO LONGER
@@ -4778,7 +4783,18 @@ void Dblqh::tupkeyConfLab(Signal* signal)
 
   TRACE_OP(regTcPtr, "TUPKEYCONF");
 
-  if (regTcPtr->simpleRead) {
+  if (readLen != 0) 
+  {
+    jam();
+
+    /* SET BIT 15 IN REQINFO */
+    LqhKeyReq::setApplicationAddressFlag(regTcPtr->reqinfo, 1);
+    regTcPtr->readlenAi = readLen;
+  }//if
+
+  if (regTcPtr->operation == ZREAD && 
+      (regTcPtr->opSimple || regTcPtr->dirtyOp))
+  {
     jam();
     /* ----------------------------------------------------------------------
      * THE OPERATION IS A SIMPLE READ. 
@@ -4792,14 +4808,6 @@ void Dblqh::tupkeyConfLab(Signal* signal)
     commitContinueAfterBlockedLab(signal);
     return;
   }//if
-  if (readLen != 0) 
-  {
-    jam();
-
-    /* SET BIT 15 IN REQINFO */
-    LqhKeyReq::setApplicationAddressFlag(regTcPtr->reqinfo, 1);
-    regTcPtr->readlenAi = readLen;
-  }//if
   regTcPtr->totSendlenAi = writeLen;
   ndbrequire(regTcPtr->totSendlenAi == regTcPtr->currTupAiLen);
   
@@ -5178,12 +5186,15 @@ void Dblqh::packLqhkeyreqLab(Signal* signal)
 /*                                                                           */
 /* ------------------------------------------------------------------------- */
     sendLqhkeyconfTc(signal, regTcPtr->tcBlockref);
-    if (regTcPtr->dirtyOp != ZTRUE) {
+    if (! (regTcPtr->dirtyOp || 
+           (regTcPtr->operation == ZREAD && regTcPtr->opSimple)))
+    {
       jam();
       regTcPtr->transactionState = TcConnectionrec::PREPARED;
       releaseOprec(signal);
     } else {
       jam();
+
 /*************************************************************>*/
 /*       DIRTY WRITES ARE USED IN TWO SITUATIONS. THE FIRST    */
 /*       SITUATION IS WHEN THEY ARE USED TO UPDATE COUNTERS AND*/
@@ -6406,8 +6417,8 @@ void Dblqh::commitContinueAfterBlockedLab(Signal* signal)
   Ptr<TcConnectionrec> regTcPtr = tcConnectptr;
   Ptr<Fragrecord> regFragptr = fragptr;
   Uint32 operation = regTcPtr.p->operation;
-  Uint32 simpleRead = regTcPtr.p->simpleRead;
   Uint32 dirtyOp = regTcPtr.p->dirtyOp;
+  Uint32 opSimple = regTcPtr.p->opSimple;
   if (regTcPtr.p->activeCreat != Fragrecord::AC_IGNORED) {
     if (operation != ZREAD) {
       TupCommitReq * const tupCommitReq = 
@@ -6465,20 +6476,29 @@ void Dblqh::commitContinueAfterBlockedLab(Signal* signal)
 	EXECUTE_DIRECT(acc, GSN_ACC_COMMITREQ, signal, 1);
       }
       
-      if (simpleRead) {
+      if (dirtyOp) 
+      {
 	jam();
-/* ------------------------------------------------------------------------- */
-/*THE OPERATION WAS A SIMPLE READ THUS THE COMMIT PHASE IS ONLY NEEDED TO    */
-/*RELEASE THE LOCKS. AT THIS POINT IN THE CODE THE LOCKS ARE RELEASED AND WE */
-/*ARE IN A POSITION TO SEND LQHKEYCONF TO TC. WE WILL ALSO RELEASE ALL       */
-/*RESOURCES BELONGING TO THIS OPERATION SINCE NO MORE WORK WILL BE           */
-/*PERFORMED.                                                                 */
-/* ------------------------------------------------------------------------- */
+        /**
+         * The dirtyRead does not send anything but TRANSID_AI from LDM
+         */
 	fragptr = regFragptr;
 	tcConnectptr = regTcPtr;
 	cleanUp(signal);
 	return;
-      }//if
+      }
+
+      /**
+       * The simpleRead will send a LQHKEYCONF
+       *   but have already released the locks
+       */
+      if (opSimple)
+      {
+	fragptr = regFragptr;
+	tcConnectptr = regTcPtr;
+        packLqhkeyreqLab(signal);
+        return;
+      }
     }
   }//if
   jamEntry();
@@ -7088,7 +7108,7 @@ void Dblqh::abortStateHandlerLab(Signal* signal)
 /* ------------------------------------------------------------------------- */
       return;
     }//if
-    if (regTcPtr->simpleRead) {
+    if (regTcPtr->opSimple) {
       jam();
 /* ------------------------------------------------------------------------- */
 /*A SIMPLE READ IS CURRENTLY RELEASING THE LOCKS OR WAITING FOR ACCESS TO    */
@@ -7356,7 +7376,8 @@ void Dblqh::continueAbortLab(Signal* signal)
 void Dblqh::continueAfterLogAbortWriteLab(Signal* signal) 
 {
   TcConnectionrec * const regTcPtr = tcConnectptr.p;
-  if (regTcPtr->simpleRead) {
+  if (regTcPtr->operation == ZREAD && regTcPtr->dirtyOp)
+  {
     jam();
     TcKeyRef * const tcKeyRef = (TcKeyRef *) signal->getDataPtrSend();
     
@@ -19027,7 +19048,6 @@ Dblqh::execDUMP_STATE_ORD(Signal* signal)
     ndbout << " operation = " << tcRec.p->operation<<endl;
     ndbout << " tcNodeFailrec = " << tcRec.p->tcNodeFailrec
 	   << " seqNoReplica = " << tcRec.p->seqNoReplica
-	   << " simpleRead = " << tcRec.p->simpleRead
 	   << endl;
     ndbout << " replicaType = " << tcRec.p->replicaType
 	   << " reclenAiLqhkey = " << tcRec.p->reclenAiLqhkey

storage/ndb/src/kernel/blocks/dbtc/Dbtc.hpp

@@ -786,6 +786,7 @@ public:
     UintR apiConnect;                      /* POINTER TO API CONNECT RECORD */
     UintR nextTcConnect;                   /* NEXT TC RECORD*/
     Uint8 dirtyOp;
+    Uint8 opSimple;   
     Uint8 lastReplicaNo;     /* NUMBER OF THE LAST REPLICA IN THE OPERATION */
     Uint8 noOfNodes;         /* TOTAL NUMBER OF NODES IN OPERATION          */
     Uint8 operation;         /* OPERATION TYPE                              */
@@ -886,13 +887,8 @@ public:
     Uint8  opExec;     
 
     Uint8  unused;
+    Uint8  unused1;
 
-    /** 
-     * IS THE OPERATION A SIMPLE TRANSACTION            
-     * 0 = NO, 1 = YES                                 
-     */
-    Uint8  opSimple;   
-    
     //---------------------------------------------------
     // Second 16 byte cache line in second 64 byte cache
     // line. Diverse use.
@@ -1464,7 +1460,7 @@ private:
   void releaseAttrinfo();
   void releaseGcp(Signal* signal);
   void releaseKeys();
-  void releaseSimpleRead(Signal*, ApiConnectRecordPtr, TcConnectRecord*);
+  void releaseDirtyRead(Signal*, ApiConnectRecordPtr, TcConnectRecord*);
   void releaseDirtyWrite(Signal* signal);
   void releaseTcCon();
   void releaseTcConnectFail(Signal* signal);
@@ -1620,7 +1616,7 @@ private:
   void startphase1x010Lab(Signal* signal);
 
   void lqhKeyConf_checkTransactionState(Signal * signal,
-					ApiConnectRecord * const regApiPtr);
+					Ptr<ApiConnectRecord> regApiPtr);
 
   void checkDropTab(Signal* signal);
 

storage/ndb/src/ndbapi/NdbBlob.cpp

@@ -1141,7 +1141,7 @@ NdbBlob::readTableParts(char* buf, Uint32 part, Uint32 count)
          * table tuple does not fully protect blob parts since DBTUP
          * commits each tuple separately.
          */
-        tOp->readTuple() == -1 ||
+        tOp->readTuple(NdbOperation::LM_SimpleRead) == -1 ||
         setPartKeyValue(tOp, part + n) == -1 ||
         tOp->getValue((Uint32)3, buf) == NULL) {
       setErrorCode(tOp);

storage/ndb/src/ndbapi/NdbIndexOperation.cpp

@@ -85,6 +85,9 @@ int NdbIndexOperation::readTuple(NdbOperation::LockMode lm)
   case LM_CommittedRead:
     return readTuple();
     break;
+  case LM_SimpleRead:
+    return readTuple();
+    break;
   default:
     return -1;
   };

storage/ndb/src/ndbapi/NdbOperationDefine.cpp

@@ -131,6 +131,8 @@ NdbOperation::readTuple(NdbOperation::LockMode lm)
   case LM_CommittedRead:
     return committedRead();
     break;
+  case LM_SimpleRead:
+    return simpleRead();
   default:
     return -1;
   };
@@ -185,24 +187,22 @@ NdbOperation::readTupleExclusive()
 int
 NdbOperation::simpleRead()
 {
-  /**
-   * Currently/still disabled
-   */
-  return readTuple();
-#if 0
+  NdbTransaction* tNdbCon = theNdbCon;
   int tErrorLine = theErrorLine;
   if (theStatus == Init) {
     theStatus = OperationDefined;
     theOperationType = ReadRequest;
     theSimpleIndicator = 1;
+    theDirtyIndicator = 0;
     theErrorLine = tErrorLine++;
-    theLockMode = LM_Read;
+    theLockMode = LM_SimpleRead;
+    m_abortOption = AO_IgnoreError;
+    tNdbCon->theSimpleState = 0;
     return 0;
   } else {
     setErrorCode(4200);
     return -1;
   }//if
-#endif
 }//NdbOperation::simpleRead()
 
 /*****************************************************************************
@@ -338,28 +338,32 @@ NdbOperation::setReadLockMode(LockMode lockMode)
 {
   /* We only support changing lock mode for read operations at this time. */
   assert(theOperationType == ReadRequest || theOperationType == ReadExclusive);
-  switch (lockMode)
-  {
-    case LM_CommittedRead:
-      theOperationType= ReadRequest;
-      theSimpleIndicator= 1;
-      theDirtyIndicator= 1;
-      break;
-    case LM_Read:
-      theNdbCon->theSimpleState= 0;
-      theOperationType= ReadRequest;
-      theSimpleIndicator= 0;
-      theDirtyIndicator= 0;
-      break;
-    case LM_Exclusive:
-      theNdbCon->theSimpleState= 0;
-      theOperationType= ReadExclusive;
-      theSimpleIndicator= 0;
-      theDirtyIndicator= 0;
-      break;
-    default:
-      /* Not supported / invalid. */
-      assert(false);
+  switch (lockMode) {
+  case LM_CommittedRead: /* TODO, check theNdbCon->theSimpleState */
+    theOperationType= ReadRequest;
+    theSimpleIndicator= 1;
+    theDirtyIndicator= 1;
+    break;
+  case LM_SimpleRead: /* TODO, check theNdbCon->theSimpleState */
+    theOperationType= ReadRequest;
+    theSimpleIndicator= 1;
+    theDirtyIndicator= 0;
+    break;
+  case LM_Read:
+    theNdbCon->theSimpleState= 0;
+    theOperationType= ReadRequest;
+    theSimpleIndicator= 0;
+    theDirtyIndicator= 0;
+    break;
+  case LM_Exclusive:
+    theNdbCon->theSimpleState= 0;
+    theOperationType= ReadExclusive;
+    theSimpleIndicator= 0;
+    theDirtyIndicator= 0;
+    break;
+  default:
+    /* Not supported / invalid. */
+    assert(false);
   }
   theLockMode= lockMode;
 }

storage/ndb/src/ndbapi/NdbOperationExec.cpp

@@ -175,12 +175,11 @@ NdbOperation::prepareSend(Uint32 aTC_ConnectPtr,
   Uint8 tInterpretIndicator = theInterpretIndicator;
   Uint8 tNoDisk = m_no_disk_flag;
 
-//-------------------------------------------------------------
-// Simple state is set if start and commit is set and it is
-// a read request. Otherwise it is set to zero.
-//-------------------------------------------------------------
+  /**
+   * A dirty read, can not abort the transaction
+   */
   Uint8 tReadInd = (theOperationType == ReadRequest);
-  Uint8 tSimpleState = tReadInd & tSimpleIndicator;
+  Uint8 tDirtyState = tReadInd & tDirtyIndicator;
 
   tcKeyReq->transId1           = tTransId1;
   tcKeyReq->transId2           = tTransId2;
@@ -206,8 +205,8 @@ NdbOperation::prepareSend(Uint32 aTC_ConnectPtr,
   tcKeyReq->setOperationType(tReqInfo, tOperationType);
   tcKeyReq->setKeyLength(tReqInfo, tTupKeyLen);
   
-  // A simple read is always ignore error
-  abortOption = tSimpleState ? (Uint8) AO_IgnoreError : (Uint8) abortOption;
+  // A dirty read is always ignore error
+  abortOption = tDirtyState ? (Uint8) AO_IgnoreError : (Uint8) abortOption;
   tcKeyReq->setAbortOption(tReqInfo, abortOption);
   m_abortOption = abortOption;
   
@@ -549,8 +548,8 @@ NdbOperation::receiveTCKEYREF( NdbApiSignal* aSignal)
   theStatus = Finished;
   theReceiver.m_received_result_length = ~0;
 
-  // not simple read
-  if(! (theOperationType == ReadRequest && theSimpleIndicator))
+  // not dirty read
+  if(! (theOperationType == ReadRequest && theDirtyIndicator))
   {
     theNdbCon->OpCompleteFailure(this);
     return -1;

storage/ndb/src/ndbapi/NdbReceiver.cpp

@@ -283,7 +283,7 @@ NdbReceiver::execTRANSID_AI(const Uint32* aDataPtr, Uint32 aLength)
   Uint32 tmp = m_received_result_length + aLength;
   m_received_result_length = tmp;
 
-  return (tmp == exp || (exp > TcKeyConf::SimpleReadBit) ? 1 : 0);
+  return (tmp == exp || (exp > TcKeyConf::DirtyReadBit) ? 1 : 0);
 }
 
 int

storage/ndb/src/ndbapi/NdbScanOperation.cpp

@@ -237,6 +237,7 @@ NdbScanOperation::setReadLockMode(LockMode lockMode)
       lockHoldMode= false;
       readCommitted= true;
       break;
+    case LM_SimpleRead:
     case LM_Read:
       lockExcl= false;
       lockHoldMode= true;

storage/ndb/src/ndbapi/NdbTransaction.cpp

@@ -1787,8 +1787,8 @@ from other transactions.
       const Uint32 tAttrInfoLen = *tPtr++;
       if (tOp && tOp->checkMagicNumber()) {
 	Uint32 done = tOp->execTCOPCONF(tAttrInfoLen);
-	if(tAttrInfoLen > TcKeyConf::SimpleReadBit){
-	  Uint32 node = tAttrInfoLen & (~TcKeyConf::SimpleReadBit);
+	if(tAttrInfoLen > TcKeyConf::DirtyReadBit){
+	  Uint32 node = tAttrInfoLen & (~TcKeyConf::DirtyReadBit);
 	  NdbNodeBitmask::set(m_db_nodes, node);
 	  if(NdbNodeBitmask::get(m_failed_db_nodes, node) && !done)
 	  {
@@ -2182,7 +2182,7 @@ NdbTransaction::report_node_failure(Uint32 id){
    * 4)   X           X
    */
   NdbOperation* tmp = theFirstExecOpInList;
-  const Uint32 len = TcKeyConf::SimpleReadBit | id;
+  const Uint32 len = TcKeyConf::DirtyReadBit | id;
   Uint32 tNoComp = theNoOfOpCompleted;
   Uint32 tNoSent = theNoOfOpSent;
   Uint32 count = 0;

storage/ndb/test/ndbapi/testBasic.cpp

@@ -136,31 +136,13 @@ int runPkRead(NDBT_Context* ctx, NDBT_Step* step){
   int loops = ctx->getNumLoops();
   int records = ctx->getNumRecords();
   int batchSize = ctx->getProperty("BatchSize", 1);
+  int lm = ctx->getProperty("LockMode", NdbOperation::LM_Read);
   int i = 0;
   HugoTransactions hugoTrans(*ctx->getTab());
   while (i<loops) {
     g_info << i << ": ";
-    if (hugoTrans.pkReadRecords(GETNDB(step), records, batchSize) != NDBT_OK){
-      g_info << endl;
-      return NDBT_FAILED;
-    }
-    i++;
-  }
-  g_info << endl;
-  return NDBT_OK;
-}
-
-int runPkDirtyRead(NDBT_Context* ctx, NDBT_Step* step){
-  int loops = ctx->getNumLoops();
-  int records = ctx->getNumRecords();
-  int batchSize = ctx->getProperty("BatchSize", 1);
-  int i = 0;
-  bool dirty = true;
-  HugoTransactions hugoTrans(*ctx->getTab());
-  while (i<loops) {
-    g_info << i << ": ";
-    if (hugoTrans.pkReadRecords(GETNDB(step), records, batchSize, 
-				NdbOperation::LM_CommittedRead) != NDBT_OK){
+    if (hugoTrans.pkReadRecords(GETNDB(step), records, batchSize,
+                                (NdbOperation::LockMode)lm) != NDBT_OK){
       g_info << endl;
       return NDBT_FAILED;
     }
@@ -1552,14 +1534,23 @@ TESTCASE("PkInsert",
 }
 TESTCASE("PkRead", 
 	   "Verify that we can insert, read and delete from this table using PK"){
+  TC_PROPERTY("LockMode", NdbOperation::LM_Read);
   INITIALIZER(runLoadTable);
   STEP(runPkRead);
   FINALIZER(runClearTable);
 }
 TESTCASE("PkDirtyRead", 
 	 "Verify that we can insert, dirty read and delete from this table using PK"){
+  TC_PROPERTY("LockMode", NdbOperation::LM_Dirty);
   INITIALIZER(runLoadTable);
-  STEP(runPkDirtyRead);
+  STEP(runPkRead);
+  FINALIZER(runClearTable);
+}
+TESTCASE("PkSimpleRead", 
+	 "Verify that we can insert, simple read and delete from this table using PK"){
+  TC_PROPERTY("LockMode", NdbOperation::LM_SimpleRead);
+  INITIALIZER(runLoadTable);
+  STEP(runPkRead);
   FINALIZER(runClearTable);
 }
 TESTCASE("PkUpdate", 

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

@@ -63,6 +63,14 @@ max-time: 500
 cmd: testBasic
 args: -n PkRead
 
+max-time: 500
+cmd: testBasic
+args: -n PkSimpleRead
+
+max-time: 500
+cmd: testBasic
+args: -n PkDirtyRead
+
 max-time: 500
 cmd: testBasic
 args: -n PkUpdate 

storage/ndb/test/src/HugoOperations.cpp

@@ -93,6 +93,7 @@ rand_lock_mode:
     case NdbOperation::LM_Read:
     case NdbOperation::LM_Exclusive:
     case NdbOperation::LM_CommittedRead:
+    case NdbOperation::LM_SimpleRead:
       if(idx && idx->getType() == NdbDictionary::Index::OrderedIndex && 
 	 pIndexScanOp == 0)
       {