Don't need to scan exclusive since keyinfo is sent anyway

ndb/test/ndbapi/testBlobs.cpp

@@ -1030,7 +1030,7 @@ readScan(int style, bool idx)
   } else {
     CHK((g_ops = g_con->getNdbIndexScanOperation(g_opt.m_x2name, g_opt.m_tname)) != 0);
   }
-  CHK((rs = g_ops->readTuples(NdbScanOperation::LM_Exclusive)) != 0);
+  CHK((rs = g_ops->readTuples(NdbScanOperation::LM_Read)) != 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);

sql/ha_ndbcluster.cc

@@ -827,10 +827,7 @@ int ha_ndbcluster::get_ndb_lock_type(enum thr_lock_type type)
   if (type == TL_WRITE_ALLOW_WRITE)
     return NdbOperation::LM_Exclusive;
   else if (uses_blob_value(retrieve_all_fields))
-    /*
-      TODO use a new scan mode to read + lock + keyinfo
-    */
-    return NdbOperation::LM_Exclusive;
+    return NdbOperation::LM_Read;
   else
     return NdbOperation::LM_CommittedRead;
 }