MS-415 Add command tasktable to dump all tasktables

Former-commit-id: 7ce1dedf36d020668af2bcaafa66b5232d4c18a5

cpp/CHANGELOG.md

@@ -52,6 +52,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-413 - Remove thrift dependency
 - MS-410 - Add resource config comment
 - MS-414 - Add TaskType in Scheduler::Task
+- MS-415 - Add command tasktable to dump all tasktables
 
 ## New Feature
 - MS-343 - Implement ResourceMgr

cpp/src/server/grpc_impl/GrpcRequestTask.cpp

@@ -13,6 +13,7 @@
 #include "version.h"
 #include "GrpcMilvusServer.h"
 #include "db/Utils.h"
+#include "scheduler/SchedInst.h"
 
 #include "src/server/Server.h"
 
@@ -753,7 +754,10 @@ ServerError
 CmdTask::OnExecute() {
     if (cmd_ == "version") {
         result_ = MILVUS_VERSION;
-    } else {
+    } else if (cmd_ == "tasktable") {
+        result_ = engine::ResMgrInst::GetInstance()->DumpTaskTables();
+    }
+    else {
         result_ = "OK";
     }