ndb - wl#2972 part 1: merge events per event op, gci

storage/ndb/include/ndbapi/NdbDictionary.hpp:
  wl#2972 part 1: merge events per event op, gci
storage/ndb/include/ndbapi/NdbEventOperation.hpp:
  wl#2972 part 1: merge events per event op, gci
storage/ndb/ndbapi-examples/ndbapi_event/Makefile:
  wl#2972 part 1: merge events per event op, gci
storage/ndb/ndbapi-examples/ndbapi_event/ndbapi_event.cpp:
  wl#2972 part 1: merge events per event op, gci
storage/ndb/src/ndbapi/NdbEventOperation.cpp:
  wl#2972 part 1: merge events per event op, gci
storage/ndb/src/ndbapi/NdbEventOperationImpl.cpp:
  wl#2972 part 1: merge events per event op, gci
storage/ndb/src/ndbapi/NdbEventOperationImpl.hpp:
  wl#2972 part 1: merge events per event op, gci
storage/ndb/test/ndbapi/test_event.cpp:
  wl#2972 part 1: merge events per event op, gci

storage/ndb/include/ndbapi/NdbDictionary.hpp

@@ -1027,7 +1027,8 @@ public:
       _TE_CREATE=6,
       _TE_GCP_COMPLETE=7,
       _TE_CLUSTER_FAILURE=8,
-      _TE_STOP=9
+      _TE_STOP=9,
+      _TE_NUL=10 // internal (INS o DEL within same GCI)
     };
 #endif
     /**

storage/ndb/include/ndbapi/NdbEventOperation.hpp

@@ -93,6 +93,12 @@ public:
    * Retrieve current state of the NdbEventOperation object
    */
   State getState();
+  /**
+   * By default events on same NdbEventOperation within same GCI
+   * are merged into a single event.  This can be changed with
+   * separateEvents(true).
+   */
+  void separateEvents(bool flag);
 
   /**
    * Activates the NdbEventOperation to start receiving events. The

storage/ndb/ndbapi-examples/ndbapi_event/Makefile

 TARGET = ndbapi_event
 SRCS = ndbapi_event.cpp
 OBJS = ndbapi_event.o
-CXX = g++
+CXX = g++ -g
 CFLAGS = -c -Wall -fno-rtti -fno-exceptions
 CXXFLAGS = 
 DEBUG = 
@@ -17,7 +17,7 @@ $(TARGET): $(OBJS)
 	$(CXX) $(CXXFLAGS) $(LFLAGS) $(LIB_DIR) $(OBJS) -lndbclient -lmysqlclient_r -lmysys -lmystrings -lz $(SYS_LIB) -o $(TARGET)
 
 $(TARGET).o: $(SRCS)
-	$(CXX) $(CFLAGS) -I$(INCLUDE_DIR) -I$(INCLUDE_DIR)/ndbapi $(SRCS)
+	$(CXX) $(CFLAGS) -I$(INCLUDE_DIR) -I$(INCLUDE_DIR)/ndbapi -I$(TOP_SRCDIR)/include $(SRCS)
 
 clean:
 	rm -f *.o $(TARGET)

storage/ndb/ndbapi-examples/ndbapi_event/ndbapi_event.cpp

@@ -58,24 +58,29 @@
 
 /**
  *
- * Assume that there is a table TAB0 which is being updated by 
+ * Assume that there is a table t0 which is being updated by 
  * another process (e.g. flexBench -l 0 -stdtables).
- * We want to monitor what happens with columns COL0, COL2, COL11
+ * We want to monitor what happens with columns c0,c1,c2,c3.
  *
  * or together with the mysql client;
  *
  * shell> mysql -u root
  * mysql> create database TEST_DB;
  * mysql> use TEST_DB;
- * mysql> create table TAB0 (COL0 int primary key, COL1 int, COL11 int) engine=ndb;
+ * mysql> create table t0 (c0 int, c1 int, c2 char(4), c3 char(4),
+ *        primary key(c0, c2)) engine ndb charset latin1;
  *
  * In another window start ndbapi_event, wait until properly started
  *
-   insert into TAB0 values (1,2,3);
-   insert into TAB0 values (2,2,3);
-   insert into TAB0 values (3,2,9);
-   update TAB0 set COL1=10 where COL0=1;
-   delete from TAB0 where COL0=1;
+   insert into t0 values (1, 2, 'a', 'b');
+   insert into t0 values (3, 4, 'c', 'd');
+   update t0 set c3 = 'e' where c0 = 1 and c2 = 'a'; -- use pk
+   update t0 set c3 = 'f'; -- use scan
+   update t0 set c3 = 'F'; -- use scan update to 'same'
+   update t0 set c2 = 'g' where c0 = 1; -- update pk part
+   update t0 set c2 = 'G' where c0 = 1; -- update pk part to 'same'
+   update t0 set c0 = 5, c2 = 'H' where c0 = 3; -- update full PK
+   delete from t0;
  *
  * you should see the data popping up in the example window
  *
@@ -92,9 +97,10 @@ int myCreateEvent(Ndb* myNdb,
 		  const char **eventColumnName,
 		  const int noEventColumnName);
 
-int main()
+int main(int argc, char** argv)
 {
   ndb_init();
+  bool sep = argc > 1 && strcmp(argv[1], "-s") == 0;
 
   Ndb_cluster_connection *cluster_connection=
     new Ndb_cluster_connection(); // Object representing the cluster
@@ -126,13 +132,15 @@ int main()
 
   if (myNdb->init() == -1) APIERROR(myNdb->getNdbError());
 
-  const char *eventName= "CHNG_IN_TAB0";
-  const char *eventTableName= "TAB0";
-  const int noEventColumnName= 3;
+  const char *eventName= "CHNG_IN_t0";
+  const char *eventTableName= "t0";
+  const int noEventColumnName= 4;
   const char *eventColumnName[noEventColumnName]=
-    {"COL0",
-     "COL1",
-     "COL11"};
+    {"c0",
+     "c1",
+     "c2",
+     "c3"
+    };
   
   // Create events
   myCreateEvent(myNdb,
@@ -142,13 +150,14 @@ int main()
 		noEventColumnName);
 
   int j= 0;
-  while (j < 5) {
+  while (j < 99) {
 
     // Start "transaction" for handling events
     NdbEventOperation* op;
     printf("create EventOperation\n");
     if ((op = myNdb->createEventOperation(eventName)) == NULL)
       APIERROR(myNdb->getNdbError());
+    op->separateEvents(sep);
 
     printf("get values\n");
     NdbRecAttr* recAttr[noEventColumnName];
@@ -175,32 +184,43 @@ int main()
 	  i++;
 	  switch (op->getEventType()) {
 	  case NdbDictionary::Event::TE_INSERT:
-	    printf("%u INSERT: ", i);
+	    printf("%u INSERT", i);
 	    break;
 	  case NdbDictionary::Event::TE_DELETE:
-	    printf("%u DELETE: ", i);
+	    printf("%u DELETE", i);
 	    break;
 	  case NdbDictionary::Event::TE_UPDATE:
-	    printf("%u UPDATE: ", i);
+	    printf("%u UPDATE", i);
 	    break;
 	  default:
 	    abort(); // should not happen
 	  }
-	  for (int i = 1; i < noEventColumnName; i++) {
+          printf(" gci=%d\n", op->getGCI());
+          printf("post:  ");
+	  for (int i = 0; i < noEventColumnName; i++) {
 	    if (recAttr[i]->isNULL() >= 0) { // we have a value
-	      printf(" post[%u]=", i);
-	      if (recAttr[i]->isNULL() == 0) // we have a non-null value
-		printf("%u", recAttr[i]->u_32_value());
-	      else                           // we have a null value
-		printf("NULL");
+	      if (recAttr[i]->isNULL() == 0) { // we have a non-null value
+                if (i < 2)
+                  printf("%-5u", recAttr[i]->u_32_value());
+                else
+                  printf("%-5.4s", recAttr[i]->aRef());
+              } else                           // we have a null value
+		printf("%-5s", "NULL");
+	    } else
+              printf("%-5s", "-");
           }
+          printf("\npre :  ");
+	  for (int i = 0; i < noEventColumnName; i++) {
 	    if (recAttrPre[i]->isNULL() >= 0) { // we have a value
-	      printf(" pre[%u]=", i);
-	      if (recAttrPre[i]->isNULL() == 0) // we have a non-null value
-		printf("%u", recAttrPre[i]->u_32_value());
-	      else                              // we have a null value
-		printf("NULL");
-	    }
+	      if (recAttrPre[i]->isNULL() == 0) { // we have a non-null value
+                if (i < 2)
+                  printf("%-5u", recAttrPre[i]->u_32_value());
+                else
+                  printf("%-5.4s", recAttrPre[i]->aRef());
+              } else                              // we have a null value
+		printf("%-5s", "NULL");
+	    } else
+              printf("%-5s", "-");
 	  }
           printf("\n");
 	}

storage/ndb/src/ndbapi/NdbEventOperation.cpp

@@ -38,6 +38,11 @@ NdbEventOperation::State NdbEventOperation::getState()
   return m_impl.getState();
 }
 
+void NdbEventOperation::separateEvents(bool flag)
+{
+  m_impl.m_separateEvents = flag;
+}
+
 NdbRecAttr *
 NdbEventOperation::getValue(const char *colName, char *aValue)
 {

storage/ndb/src/ndbapi/NdbEventOperationImpl.hpp

@@ -25,16 +25,19 @@
 #define NDB_EVENT_OP_MAGIC_NUMBER 0xA9F301B4
 
 class NdbEventOperationImpl;
+
 struct EventBufData
 {
   union {
     SubTableData *sdata;
-    char *memory;
+    Uint32 *memory;
   };
   LinearSectionPtr ptr[3];
   unsigned sz;
   NdbEventOperationImpl *m_event_op;
   EventBufData *m_next; // Next wrt to global order
+  EventBufData *m_next_hash; // Next in per-GCI hash
+  Uint32 m_pkhash; // PK hash (without op) for fast compare
 };
 
 class EventBufData_list
@@ -116,6 +119,34 @@ void EventBufData_list::append(const EventBufData_list &list)
   m_sz+= list.m_sz;
 }
 
+// GCI bucket has also a hash over data, with key event op, table PK.
+// It can only be appended to and is invalid after remove_first().
+class EventBufData_hash
+{
+public:
+  struct Pos { // search result
+    Uint32 index;       // index into hash array
+    EventBufData* data; // non-zero if found
+    Uint32 pkhash;      // PK hash
+  };
+
+  static Uint32 getpkhash(NdbEventOperationImpl* op, LinearSectionPtr ptr[3]);
+  static bool getpkequal(NdbEventOperationImpl* op, LinearSectionPtr ptr1[3], LinearSectionPtr ptr2[3]);
+
+  void search(Pos& hpos, NdbEventOperationImpl* op, LinearSectionPtr ptr[3]);
+  void append(Pos& hpos, EventBufData* data);
+
+  enum { GCI_EVENT_HASH_SIZE = 101 };
+  EventBufData* m_hash[GCI_EVENT_HASH_SIZE];
+};
+
+inline
+void EventBufData_hash::append(Pos& hpos, EventBufData* data)
+{
+  data->m_next_hash = m_hash[hpos.index];
+  m_hash[hpos.index] = data;
+}
+
 struct Gci_container
 {
   enum State 
@@ -127,6 +158,7 @@ struct Gci_container
   Uint32 m_gcp_complete_rep_count; // Remaining SUB_GCP_COMPLETE_REP until done
   Uint64 m_gci;                    // GCI
   EventBufData_list m_data;
+  EventBufData_hash m_data_hash;
 };
 
 class NdbEventOperationImpl : public NdbEventOperation {
@@ -174,6 +206,8 @@ public:
   Uint32 m_eventId;
   Uint32 m_oid;
 
+  bool m_separateEvents;
+  
   EventBufData *m_data_item;
 
   void *m_custom_data;
@@ -212,7 +246,6 @@ public:
   void add_op();
   void remove_op();
   void init_gci_containers();
-  Uint32 m_active_op_count;
 
   // accessed from the "receive thread"
   int insertDataL(NdbEventOperationImpl *op,
@@ -233,10 +266,15 @@ public:
 
   NdbEventOperationImpl *move_data();
 
-  // used by both user thread and receive thread
-  int copy_data_alloc(const SubTableData * const f_sdata,
-		      LinearSectionPtr f_ptr[3],
-		      EventBufData *ev_buf);
+  // routines to copy/merge events
+  EventBufData* alloc_data();
+  int alloc_mem(EventBufData* data, LinearSectionPtr ptr[3]);
+  int copy_data(const SubTableData * const sdata,
+                LinearSectionPtr ptr[3],
+                EventBufData* data);
+  int merge_data(const SubTableData * const sdata,
+                 LinearSectionPtr ptr[3],
+                 EventBufData* data);
 
   void free_list(EventBufData_list &list);
 
@@ -290,6 +328,8 @@ private:
   // dropped event operations that have not yet
   // been deleted
   NdbEventOperationImpl *m_dropped_ev_op;
+
+  Uint32 m_active_op_count;
 };
 
 inline

storage/ndb/test/ndbapi/test_event.cpp

@@ -169,6 +169,7 @@ eventOperation(Ndb* pNdb, const NdbDictionary::Table &tab, void* pstats, int rec
     g_err << function << "Event operation creation failed\n";
     return NDBT_FAILED;
   }
+  pOp->separateEvents(true);
 
   g_info << function << "get values\n";
   NdbRecAttr* recAttr[1024];
@@ -370,6 +371,7 @@ int runCreateDropEventOperation(NDBT_Context* ctx, NDBT_Step* step)
       g_err << "Event operation creation failed\n";
       return NDBT_FAILED;
     }
+    pOp->separateEvents(true);
 
     g_info << "dropping event operation" << endl;
     int res = pNdb->dropEventOperation(pOp);
@@ -540,6 +542,7 @@ int runEventApplier(NDBT_Context* ctx, NDBT_Step* step)
     g_err << "Event operation creation failed on %s" << buf << endl;
     DBUG_RETURN(NDBT_FAILED);
   }
+  pOp->separateEvents(true);
 
   int i;
   int n_columns= table->getNoOfColumns();
@@ -1185,6 +1188,7 @@ static int createEventOperations(Ndb * ndb)
     {
       DBUG_RETURN(NDBT_FAILED);
     }
+    pOp->separateEvents(true);
 
     int n_columns= pTabs[i]->getNoOfColumns();
     for (int j = 0; j < n_columns; j++)