Merge clam.ndb.mysql.com:/space/pekka/ndb/version/my50-bug19285

into  clam.ndb.mysql.com:/space/pekka/ndb/version/my51-bug19285


storage/ndb/include/ndbapi/NdbBlob.hpp:
  manual merge
storage/ndb/include/ndbapi/NdbScanOperation.hpp:
  SCCS merged
storage/ndb/src/ndbapi/NdbBlob.cpp:
  SCCS merged
storage/ndb/src/ndbapi/NdbBlobImpl.hpp:
  manual merge
storage/ndb/src/ndbapi/ndberror.c:
  use local - add 4275 afterwards
storage/ndb/test/ndbapi/testBlobs.cpp:
  automerge

storage/ndb/include/ndbapi/NdbBlob.hpp

@@ -79,19 +79,41 @@ class NdbEventOperationImpl;
  * Non-void NdbBlob methods return -1 on error and 0 on success.  Output
  * parameters are used when necessary.
  *
- * Operation types:
- * - insertTuple must use setValue if blob column is non-nullable
- * - readTuple with exclusive lock can also update existing value
- * - updateTuple can overwrite with setValue or update existing value
- * - writeTuple always overwrites and must use setValue if non-nullable
+ * Usage notes for different operation types:
+ *
+ * - insertTuple must use setValue if blob attribute is non-nullable
+ *
+ * - readTuple or scan readTuples with lock mode LM_CommittedRead is
+ *   automatically upgraded to lock mode LM_Read if any blob attributes
+ *   are accessed (to guarantee consistent view)
+ *
+ * - readTuple (with any lock mode) can only read blob value
+ *
+ * - updateTuple can either overwrite existing value with setValue or
+ *   update it in active phase
+ *
+ * - writeTuple always overwrites blob value and must use setValue if
+ *   blob attribute is non-nullable
+ *
  * - deleteTuple creates implicit non-accessible blob handles
- * - scan with exclusive lock can also update existing value
- * - scan "lock takeover" update op must do its own getBlobHandle
+ *
+ * - scan readTuples (any lock mode) can use its blob handles only
+ *   to read blob value
+ *
+ * - scan readTuples with lock mode LM_Exclusive can update row and blob
+ *   value using updateCurrentTuple, where the operation returned must
+ *   create its own blob handles explicitly
+ *
+ * - scan readTuples with lock mode LM_Exclusive can delete row (and
+ *   therefore blob values) using deleteCurrentTuple, which creates
+ *   implicit non-accessible blob handles
+ *
+ * - the operation returned by lockCurrentTuple cannot update blob value
  *
  * Bugs / limitations:
- * - lock mode upgrade should be handled automatically
- * - lock mode vs allowed operation is not checked
+ *
  * - too many pending blob ops can blow up i/o buffers
+ *
  * - table and its blob part tables are not created atomically
  */
 #ifndef DOXYGEN_SHOULD_SKIP_INTERNAL
@@ -214,6 +236,9 @@ public:
   /**
    * Return error object.  The error may be blob specific or may be
    * copied from a failed implicit operation.
+   *
+   * The error code is copied back to the operation unless the operation
+   * already has a non-zero error code.
    */
   const NdbError& getNdbError() const;
   /**
@@ -326,6 +351,7 @@ private:
   bool isWriteOp();
   bool isDeleteOp();
   bool isScanOp();
+  bool isReadOnlyOp();
   bool isTakeOverOp();
   // computations
   Uint32 getPartNumber(Uint64 pos);
@@ -367,10 +393,10 @@ private:
   int atNextResult();
   int atNextEvent();
   // errors
-  void setErrorCode(int anErrorCode, bool invalidFlag = true);
-  void setErrorCode(NdbOperation* anOp, bool invalidFlag = true);
-  void setErrorCode(NdbTransaction* aCon, bool invalidFlag = true);
-  void setErrorCode(NdbEventOperationImpl* anOp, bool invalidFlag = true);
+  void setErrorCode(int anErrorCode, bool invalidFlag = false);
+  void setErrorCode(NdbOperation* anOp, bool invalidFlag = false);
+  void setErrorCode(NdbTransaction* aCon, bool invalidFlag = false);
+  void setErrorCode(NdbEventOperationImpl* anOp, bool invalidFlag = false);
 #ifdef VM_TRACE
   int getOperationType() const;
   friend class NdbOut& operator<<(NdbOut&, const NdbBlob&);

storage/ndb/include/ndbapi/NdbScanOperation.hpp

@@ -42,7 +42,7 @@ public:
    * readTuples.
    */
   enum ScanFlag {
-    SF_TupScan = (1 << 16),     // scan TUP - only LM_CommittedRead
+    SF_TupScan = (1 << 16),     // scan TUP
     SF_OrderBy = (1 << 24),     // index scan in order
     SF_Descending = (2 << 24),  // index scan in descending order
     SF_ReadRangeNo = (4 << 24), // enable @ref get_range_no

storage/ndb/src/ndbapi/NdbBlob.cpp

@@ -393,6 +393,16 @@ NdbBlob::isScanOp()
     theNdbOp->theOperationType == NdbOperation::OpenRangeScanRequest;
 }
 
+inline bool
+NdbBlob::isReadOnlyOp()
+{
+  return ! (
+    theNdbOp->theOperationType == NdbOperation::InsertRequest ||
+    theNdbOp->theOperationType == NdbOperation::UpdateRequest ||
+    theNdbOp->theOperationType == NdbOperation::WriteRequest
+  );
+}
+
 inline bool
 NdbBlob::isTakeOverOp()
 {
@@ -638,12 +648,12 @@ NdbBlob::getValue(void* data, Uint32 bytes)
 {
   DBUG_ENTER("NdbBlob::getValue");
   DBUG_PRINT("info", ("data=%p bytes=%u", data, bytes));
-  if (theGetFlag || theState != Prepared) {
-    setErrorCode(NdbBlobImpl::ErrState);
+  if (! isReadOp() && ! isScanOp()) {
+    setErrorCode(NdbBlobImpl::ErrCompat);
     DBUG_RETURN(-1);
   }
-  if (! isReadOp() && ! isScanOp()) {
-    setErrorCode(NdbBlobImpl::ErrUsage);
+  if (theGetFlag || theState != Prepared) {
+    setErrorCode(NdbBlobImpl::ErrState);
     DBUG_RETURN(-1);
   }
   if (data == NULL && bytes != 0) {
@@ -661,12 +671,12 @@ NdbBlob::setValue(const void* data, Uint32 bytes)
 {
   DBUG_ENTER("NdbBlob::setValue");
   DBUG_PRINT("info", ("data=%p bytes=%u", data, bytes));
-  if (theSetFlag || theState != Prepared) {
-    setErrorCode(NdbBlobImpl::ErrState);
+  if (isReadOnlyOp()) {
+    setErrorCode(NdbBlobImpl::ErrCompat);
     DBUG_RETURN(-1);
   }
-  if (! isInsertOp() && ! isUpdateOp() && ! isWriteOp()) {
-    setErrorCode(NdbBlobImpl::ErrUsage);
+  if (theSetFlag || theState != Prepared) {
+    setErrorCode(NdbBlobImpl::ErrState);
     DBUG_RETURN(-1);
   }
   if (data == NULL && bytes != 0) {
@@ -762,6 +772,10 @@ int
 NdbBlob::setNull()
 {
   DBUG_ENTER("NdbBlob::setNull");
+  if (isReadOnlyOp()) {
+    setErrorCode(NdbBlobImpl::ErrCompat);
+    DBUG_RETURN(-1);
+  }
   if (theNullFlag == -1) {
     if (theState == Prepared) {
       DBUG_RETURN(setValue(0, 0));
@@ -800,6 +814,10 @@ NdbBlob::truncate(Uint64 length)
 {
   DBUG_ENTER("NdbBlob::truncate");
   DBUG_PRINT("info", ("length=%llu", length));
+  if (isReadOnlyOp()) {
+    setErrorCode(NdbBlobImpl::ErrCompat);
+    DBUG_RETURN(-1);
+  }
   if (theNullFlag == -1) {
     setErrorCode(NdbBlobImpl::ErrState);
     DBUG_RETURN(-1);
@@ -857,12 +875,14 @@ NdbBlob::setPos(Uint64 pos)
 int
 NdbBlob::readData(void* data, Uint32& bytes)
 {
+  DBUG_ENTER("NdbBlob::readData");
   if (theState != Active) {
     setErrorCode(NdbBlobImpl::ErrState);
-    return -1;
+    DBUG_RETURN(-1);
   }
   char* buf = static_cast<char*>(data);
-  return readDataPrivate(buf, bytes);
+  int ret = readDataPrivate(buf, bytes);
+  DBUG_RETURN(ret);
 }
 
 int
@@ -951,12 +971,18 @@ NdbBlob::readDataPrivate(char* buf, Uint32& bytes)
 int
 NdbBlob::writeData(const void* data, Uint32 bytes)
 {
+  DBUG_ENTER("NdbBlob::writeData");
+  if (isReadOnlyOp()) {
+    setErrorCode(NdbBlobImpl::ErrCompat);
+    DBUG_RETURN(-1);
+  }
   if (theState != Active) {
     setErrorCode(NdbBlobImpl::ErrState);
-    return -1;
+    DBUG_RETURN(-1);
   }
   const char* buf = static_cast<const char*>(data);
-  return writeDataPrivate(buf, bytes);
+  int ret = writeDataPrivate(buf, bytes);
+  DBUG_RETURN(0);
 }
 
 int
@@ -1355,6 +1381,9 @@ NdbBlob::atPrepare(NdbTransaction* aCon, NdbOperation* anOp, const NdbColumnImpl
         DBUG_RETURN(-1);
     }
     if (isReadOp()) {
+      // upgrade lock mode
+      if (theNdbOp->theLockMode == NdbOperation::LM_CommittedRead)
+        theNdbOp->theLockMode = NdbOperation::LM_Read;
       // add read of head+inline in this op
       if (getHeadInlineValue(theNdbOp) == -1)
         DBUG_RETURN(-1);
@@ -1373,6 +1402,9 @@ NdbBlob::atPrepare(NdbTransaction* aCon, NdbOperation* anOp, const NdbColumnImpl
     supportedOp = true;
   }
   if (isScanOp()) {
+    // upgrade lock mode
+    if (theNdbOp->theLockMode == NdbOperation::LM_CommittedRead)
+      theNdbOp->theLockMode = NdbOperation::LM_Read;
     // add read of head+inline in this op
     if (getHeadInlineValue(theNdbOp) == -1)
       DBUG_RETURN(-1);

storage/ndb/src/ndbapi/NdbBlobImpl.hpp

@@ -24,7 +24,7 @@ public:
   STATIC_CONST( ErrTable = 4263 );
   // "Invalid usage of blob attribute" 
   STATIC_CONST( ErrUsage = 4264 );
-  // "Method is not valid in current blob state"
+  // "The blob method is not valid in current blob state"
   STATIC_CONST( ErrState = 4265 );
   // "Invalid blob seek position"
   STATIC_CONST( ErrSeek = 4266 );
@@ -33,9 +33,11 @@ public:
   // "Error in blob head update forced rollback of transaction"
   STATIC_CONST( ErrAbort = 4268 );
   // "Unknown blob error"
-  STATIC_CONST( ErrUnknown = 4269 );
+  STATIC_CONST( ErrUnknown = 4270 );
   // "Corrupted main table PK in blob operation"
   STATIC_CONST( ErrCorruptPK = 4274 );
+  // "The blob method is incompatible with operation type or lock mode"
+  STATIC_CONST( ErrCompat = 4275 );
 };
 
 #endif

storage/ndb/test/ndbapi/testBlobs.cpp

@@ -297,13 +297,15 @@ createTable()
 struct Bval {
   char* m_val;
   unsigned m_len;
-  char* m_buf;
+  char* m_buf; // read/write buffer
   unsigned m_buflen;
+  int m_error_code; // for testing expected error code
   Bval() :
     m_val(0),
     m_len(0),
-    m_buf(0),   // read/write buffer
-    m_buflen(0)
+    m_buf(0),
+    m_buflen(0),
+    m_error_code(0)
     {}
   ~Bval() { delete [] m_val; delete [] m_buf; }
   void alloc(unsigned buflen) {
@@ -459,19 +461,23 @@ getBlobLength(NdbBlob* h, unsigned& len)
 // setValue / getValue
 
 static int
-setBlobValue(NdbBlob* h, const Bval& v)
+setBlobValue(NdbBlob* h, const Bval& v, int error_code = 0)
 {
   bool null = (v.m_val == 0);
   bool isNull;
   unsigned len;
   DBG("setValue " <<  h->getColumn()->getName() << " len=" << v.m_len << " null=" << null);
   if (null) {
-    CHK(h->setNull() == 0);
+    CHK(h->setNull() == 0 || h->getNdbError().code == error_code);
+    if (error_code)
+      return 0;
     isNull = false;
     CHK(h->getNull(isNull) == 0 && isNull == true);
     CHK(getBlobLength(h, len) == 0 && len == 0);
   } else {
-    CHK(h->setValue(v.m_val, v.m_len) == 0);
+    CHK(h->setValue(v.m_val, v.m_len) == 0 || h->getNdbError().code == error_code);
+    if (error_code)
+      return 0;
     CHK(h->getNull(isNull) == 0 && isNull == false);
     CHK(getBlobLength(h, len) == 0 && len == v.m_len);
   }
@@ -479,11 +485,11 @@ setBlobValue(NdbBlob* h, const Bval& v)
 }
 
 static int
-setBlobValue(const Tup& tup)
+setBlobValue(const Tup& tup, int error_code = 0)
 {
-  CHK(setBlobValue(g_bh1, tup.m_blob1) == 0);
+  CHK(setBlobValue(g_bh1, tup.m_blob1, error_code) == 0);
   if (! g_opt.m_oneblob)
-    CHK(setBlobValue(g_bh2, tup.m_blob2) == 0);
+    CHK(setBlobValue(g_bh2, tup.m_blob2, error_code) == 0);
   return 0;
 }
 
@@ -543,13 +549,18 @@ writeBlobData(NdbBlob* h, const Bval& v)
   bool isNull;
   unsigned len;
   DBG("write " <<  h->getColumn()->getName() << " len=" << v.m_len << " null=" << null);
+  int error_code = v.m_error_code;
   if (null) {
-    CHK(h->setNull() == 0);
+    CHK(h->setNull() == 0 || h->getNdbError().code == error_code);
+    if (error_code)
+      return 0;
     isNull = false;
     CHK(h->getNull(isNull) == 0 && isNull == true);
     CHK(getBlobLength(h, len) == 0 && len == 0);
   } else {
-    CHK(h->truncate(v.m_len) == 0);
+    CHK(h->truncate(v.m_len) == 0 || h->getNdbError().code == error_code);
+    if (error_code)
+      return 0;
     unsigned n = 0;
     do {
       unsigned m = g_opt.m_full ? v.m_len : urandom(v.m_len + 1);
@@ -568,11 +579,14 @@ writeBlobData(NdbBlob* h, const Bval& v)
 }
 
 static int
-writeBlobData(const Tup& tup)
+writeBlobData(Tup& tup, int error_code = 0)
 {
+  tup.m_blob1.m_error_code = error_code;
   CHK(writeBlobData(g_bh1, tup.m_blob1) == 0);
-  if (! g_opt.m_oneblob)
+  if (! g_opt.m_oneblob) {
+    tup.m_blob2.m_error_code = error_code;
     CHK(writeBlobData(g_bh2, tup.m_blob2) == 0);
+  }
   return 0;
 }
 
@@ -635,19 +649,20 @@ blobWriteHook(NdbBlob* h, void* arg)
 }
 
 static int
-setBlobWriteHook(NdbBlob* h, Bval& v)
+setBlobWriteHook(NdbBlob* h, Bval& v, int error_code = 0)
 {
   DBG("setBlobWriteHook");
+  v.m_error_code = error_code;
   CHK(h->setActiveHook(blobWriteHook, &v) == 0);
   return 0;
 }
 
 static int
-setBlobWriteHook(Tup& tup)
+setBlobWriteHook(Tup& tup, int error_code = 0)
 {
-  CHK(setBlobWriteHook(g_bh1, tup.m_blob1) == 0);
+  CHK(setBlobWriteHook(g_bh1, tup.m_blob1, error_code) == 0);
   if (! g_opt.m_oneblob)
-    CHK(setBlobWriteHook(g_bh2, tup.m_blob2) == 0);
+    CHK(setBlobWriteHook(g_bh2, tup.m_blob2, error_code) == 0);
   return 0;
 }
 
@@ -869,7 +884,10 @@ readPk(int style)
     DBG("readPk pk1=" << hex << tup.m_pk1);
     CHK((g_con = g_ndb->startTransaction()) != 0);
     CHK((g_opr = g_con->getNdbOperation(g_opt.m_tname)) != 0);
+    if (urandom(2) == 0)
       CHK(g_opr->readTuple() == 0);
+    else
+      CHK(g_opr->readTuple(NdbOperation::LM_CommittedRead) == 0);
     CHK(g_opr->equal("PK1", tup.m_pk1) == 0);
     if (g_opt.m_pk2len != 0)
       CHK(g_opr->equal("PK2", tup.m_pk2) == 0);
@@ -883,6 +901,8 @@ readPk(int style)
       CHK(readBlobData(tup) == 0);
     }
     CHK(g_con->execute(Commit) == 0);
+    // verify lock mode upgrade
+    CHK(g_opr->getLockMode() == NdbOperation::LM_Read);
     if (style == 0 || style == 1) {
       CHK(verifyBlobValue(tup) == 0);
     }
@@ -900,23 +920,40 @@ updatePk(int style)
   for (unsigned k = 0; k < g_opt.m_rows; k++) {
     Tup& tup = g_tups[k];
     DBG("updatePk pk1=" << hex << tup.m_pk1);
+    while (1) {
+      int mode = urandom(3);
+      int error_code = mode == 0 ? 0 : 4275;
       CHK((g_con = g_ndb->startTransaction()) != 0);
       CHK((g_opr = g_con->getNdbOperation(g_opt.m_tname)) != 0);
+      if (mode == 0) {
+        DBG("using updateTuple");
         CHK(g_opr->updateTuple() == 0);
+      } else if (mode == 1) {
+        DBG("using readTuple exclusive");
+        CHK(g_opr->readTuple(NdbOperation::LM_Exclusive) == 0);
+      } else {
+        DBG("using readTuple - will fail and retry");
+        CHK(g_opr->readTuple() == 0);
+      }
       CHK(g_opr->equal("PK1", tup.m_pk1) == 0);
       if (g_opt.m_pk2len != 0)
         CHK(g_opr->equal("PK2", tup.m_pk2) == 0);
       CHK(getBlobHandles(g_opr) == 0);
       if (style == 0) {
-      CHK(setBlobValue(tup) == 0);
+        CHK(setBlobValue(tup, error_code) == 0);
       } else if (style == 1) {
-      CHK(setBlobWriteHook(tup) == 0);
+        CHK(setBlobWriteHook(tup, error_code) == 0);
       } else {
         CHK(g_con->execute(NoCommit) == 0);
-      CHK(writeBlobData(tup) == 0);
+        CHK(writeBlobData(tup, error_code) == 0);
       }
+      if (error_code == 0) {
         CHK(g_con->execute(Commit) == 0);
         g_ndb->closeTransaction(g_con);
+        break;
+      }
+      g_ndb->closeTransaction(g_con);
+    }
     g_opr = 0;
     g_con = 0;
     tup.m_exists = true;
@@ -1002,7 +1039,10 @@ readIdx(int style)
     DBG("readIdx pk1=" << hex << tup.m_pk1);
     CHK((g_con = g_ndb->startTransaction()) != 0);
     CHK((g_opx = g_con->getNdbIndexOperation(g_opt.m_x1name, g_opt.m_tname)) != 0);
+    if (urandom(2) == 0)
       CHK(g_opx->readTuple() == 0);
+    else
+      CHK(g_opx->readTuple(NdbOperation::LM_CommittedRead) == 0);
     CHK(g_opx->equal("PK2", tup.m_pk2) == 0);
     CHK(getBlobHandles(g_opx) == 0);
     if (style == 0) {
@@ -1014,6 +1054,8 @@ readIdx(int style)
       CHK(readBlobData(tup) == 0);
     }
     CHK(g_con->execute(Commit) == 0);
+    // verify lock mode upgrade (already done by NdbIndexOperation)
+    CHK(g_opx->getLockMode() == NdbOperation::LM_Read);
     if (style == 0 || style == 1) {
       CHK(verifyBlobValue(tup) == 0);
     }
@@ -1031,6 +1073,7 @@ updateIdx(int style)
   for (unsigned k = 0; k < g_opt.m_rows; k++) {
     Tup& tup = g_tups[k];
     DBG("updateIdx pk1=" << hex << tup.m_pk1);
+    // skip 4275 testing
     CHK((g_con = g_ndb->startTransaction()) != 0);
     CHK((g_opx = g_con->getNdbIndexOperation(g_opt.m_x1name, g_opt.m_tname)) != 0);
     CHK(g_opx->updateTuple() == 0);
@@ -1128,7 +1171,10 @@ readScan(int style, bool idx)
   } else {
     CHK((g_ops = g_con->getNdbIndexScanOperation(g_opt.m_x2name, g_opt.m_tname)) != 0);
   }
-  CHK(g_ops->readTuples(NdbScanOperation::LM_Read) == 0);
+  if (urandom(2) == 0)
+    CHK(g_ops->readTuples(NdbOperation::LM_Read) == 0);
+  else
+    CHK(g_ops->readTuples(NdbOperation::LM_CommittedRead) == 0);
   CHK(g_ops->getValue("PK1", (char*)&tup.m_pk1) != 0);
   if (g_opt.m_pk2len != 0)
     CHK(g_ops->getValue("PK2", tup.m_pk2) != 0);
@@ -1139,6 +1185,8 @@ readScan(int style, bool idx)
     CHK(setBlobReadHook(tup) == 0);
   }
   CHK(g_con->execute(NoCommit) == 0);
+  // verify lock mode upgrade
+  CHK(g_ops->getLockMode() == NdbOperation::LM_Read);
   unsigned rows = 0;
   while (1) {
     int ret;
@@ -1180,7 +1228,7 @@ updateScan(int style, bool idx)
   } else {
     CHK((g_ops = g_con->getNdbIndexScanOperation(g_opt.m_x2name, g_opt.m_tname)) != 0);
   }
-  CHK(g_ops->readTuples(NdbScanOperation::LM_Exclusive) == 0);
+  CHK(g_ops->readTuples(NdbOperation::LM_Exclusive) == 0);
   CHK(g_ops->getValue("PK1", (char*)&tup.m_pk1) != 0);
   if (g_opt.m_pk2len != 0)
     CHK(g_ops->getValue("PK2", tup.m_pk2) != 0);
@@ -1199,6 +1247,7 @@ updateScan(int style, bool idx)
     // calculate new blob values
     calcBval(g_tups[k], false);
     tup.copyfrom(g_tups[k]);
+    // cannot do 4275 testing, scan op error code controls execution
     CHK((g_opr = g_ops->updateCurrentTuple()) != 0);
     CHK(getBlobHandles(g_opr) == 0);
     if (style == 0) {
@@ -1232,7 +1281,7 @@ deleteScan(bool idx)
   } else {
     CHK((g_ops = g_con->getNdbIndexScanOperation(g_opt.m_x2name, g_opt.m_tname)) != 0);
   }
-  CHK(g_ops->readTuples(NdbScanOperation::LM_Exclusive) == 0);
+  CHK(g_ops->readTuples(NdbOperation::LM_Exclusive) == 0);
   CHK(g_ops->getValue("PK1", (char*)&tup.m_pk1) != 0);
   if (g_opt.m_pk2len != 0)
     CHK(g_ops->getValue("PK2", tup.m_pk2) != 0);
@@ -1651,7 +1700,7 @@ testperf()
     char b[20];
     CHK((g_con = g_ndb->startTransaction()) != 0);
     CHK((g_ops = g_con->getNdbScanOperation(tab.getName())) != 0);
-    CHK(g_ops->readTuples(NdbScanOperation::LM_Read) == 0);
+    CHK(g_ops->readTuples(NdbOperation::LM_Read) == 0);
     CHK(g_ops->getValue(cA, (char*)&a) != 0);
     CHK(g_ops->getValue(cB, b) != 0);
     CHK(g_con->execute(NoCommit) == 0);
@@ -1680,7 +1729,7 @@ testperf()
     char c[20];
     CHK((g_con = g_ndb->startTransaction()) != 0);
     CHK((g_ops = g_con->getNdbScanOperation(tab.getName())) != 0);
-    CHK(g_ops->readTuples(NdbScanOperation::LM_Read) == 0);
+    CHK(g_ops->readTuples(NdbOperation::LM_Read) == 0);
     CHK(g_ops->getValue(cA, (char*)&a) != 0);
     CHK((g_bh1 = g_ops->getBlobHandle(cC)) != 0);
     CHK(g_con->execute(NoCommit) == 0);