add backend

source/libs/stream/src/streamStateRocksdb.c

@@ -629,7 +629,8 @@ int32_t streamStateSessionGet_rocksdb(SStreamState* pState, SSessionKey* key, vo
       code = -1;
     } else {
       *key = resKey;
-      *pVal = tmp;
+      *pVal = taosMemoryMalloc(*pVLen);
+      memcpy(*pVal, tmp, *pVLen);
     }
   }
   streamStateFreeCur(pCur);
@@ -707,14 +708,14 @@ int32_t streamStateStateAddIfNotExist_rocksdb(SStreamState* pState, SSessionKey*
   if (code == 0) {
     if (key->win.skey <= tmpKey.win.skey && tmpKey.win.ekey <= key->win.ekey) {
       memcpy(tmp, *pVal, valSize);
-      streamStateSessionDel(pState, key);
+      streamStateSessionDel_rocksdb(pState, key);
       goto _end;
     }
 
     void* stateKey = (char*)(*pVal) + (valSize - keyDataLen);
     if (fn(pKeyData, stateKey) == true) {
       memcpy(tmp, *pVal, valSize);
-      streamStateSessionDel(pState, key);
+      streamStateSessionDel_rocksdb(pState, key);
       goto _end;
     }
 
@@ -746,7 +747,7 @@ _end:
   return res;
 }
 
-int32_t streamStateSessionClear(SStreamState* pState) {
+int32_t streamStateSessionClear_rocksdb(SStreamState* pState) {
   SSessionKey      key = {.win.skey = 0, .win.ekey = 0, .groupId = 0};
   SStreamStateCur* pCur = streamStateSessionSeekKeyCurrentNext_rocksdb(pState, &key);
 
@@ -756,7 +757,7 @@ int32_t streamStateSessionClear(SStreamState* pState) {
     int32_t     size = 0;
     int32_t     code = streamStateSessionGetKVByCur_rocksdb(pCur, &delKey, &buf, &size);
     if (code == 0 && size > 0) {
-      memset(buf, 0, size);
+      // memset(buf, 0, size);
       streamStateSessionPut_rocksdb(pState, &delKey, buf, size);
     } else {
       break;