Fixed an error when using update sentence. (vesoft-inc#1830)

Fixed an error that the space could not be found when executing multiple statements (use space statements)
when executing update vertex/edge.

for example:

USE issue1827_update;UPDATE VERTEX 100 SET player.age = 31;

src/graph/UpdateEdgeExecutor.cpp

@@ -23,8 +23,11 @@ UpdateEdgeExecutor::UpdateEdgeExecutor(Sentence *sentence,
     sentence_ = static_cast<UpdateEdgeSentence*>(sentence);
 }
 
-
 Status UpdateEdgeExecutor::prepare() {
+    return Status::OK();
+}
+
+Status UpdateEdgeExecutor::prepareData() {
     DCHECK(sentence_ != nullptr);
     Status status = Status::OK();
 
@@ -242,6 +245,11 @@ void UpdateEdgeExecutor::insertReverselyEdge(storage::cpp2::UpdateResponse &&rpc
 
 void UpdateEdgeExecutor::execute() {
     FLOG_INFO("Executing UpdateEdge: %s", sentence_->toString().c_str());
+    auto status = prepareData();
+    if (!status.ok()) {
+        doError(std::move(status));
+        return;
+    }
     std::string filterStr = filter_ ? Expression::encode(filter_) : "";
     auto returns = getReturnColumns();
     auto future = ectx()->getStorageClient()->updateEdge(spaceId_,

src/graph/UpdateEdgeExecutor.h

@@ -39,6 +39,7 @@ class UpdateEdgeExecutor final : public Executor {
     void setupResponse(cpp2::ExecutionResponse &resp) override;
 
 private:
+    Status prepareData();
     // To do some preparing works on the clauses
     Status prepareSet();
 

src/graph/UpdateVertexExecutor.cpp

@@ -22,8 +22,11 @@ UpdateVertexExecutor::UpdateVertexExecutor(Sentence *sentence,
     sentence_ = static_cast<UpdateVertexSentence*>(sentence);
 }
 
-
 Status UpdateVertexExecutor::prepare() {
+    return Status::OK();
+}
+
+Status UpdateVertexExecutor::prepareData() {
     DCHECK(sentence_ != nullptr);
 
     spaceId_ = ectx()->rctx()->session()->space();
@@ -185,6 +188,13 @@ void UpdateVertexExecutor::finishExecution(storage::cpp2::UpdateResponse &&rpcRe
 
 void UpdateVertexExecutor::execute() {
     FLOG_INFO("Executing UpdateVertex: %s", sentence_->toString().c_str());
+
+    auto status = prepareData();
+    if (!status.ok()) {
+        doError(std::move(status));
+        return;
+    }
+
     std::string filterStr = filter_ ? Expression::encode(filter_) : "";
     auto returns = getReturnColumns();
     auto future = ectx()->getStorageClient()->updateVertex(spaceId_,

src/graph/UpdateVertexExecutor.h

@@ -37,6 +37,7 @@ class UpdateVertexExecutor final : public Executor {
     void setupResponse(cpp2::ExecutionResponse &resp) override;
 
 private:
+    Status prepareData();
     // To do some preparing works on the clauses
     Status prepareSet();