diff --git a/src/graph/context/ast/QueryAstContext.h b/src/graph/context/ast/QueryAstContext.h
index c3ab482e1ac..70dea565857 100644
--- a/src/graph/context/ast/QueryAstContext.h
+++ b/src/graph/context/ast/QueryAstContext.h
@@ -127,10 +127,13 @@ struct SubgraphContext final : public AstContext {
 
 struct FetchVerticesContext final : public AstContext {
   Starts from;
-  bool distince{false};
+  bool distinct{false};
   YieldColumns* yieldExpr{nullptr};
   ExpressionProps exprProps;
   std::vector<std::string> colNames;
+
+  // store the result of the previous sentence
+  std::string inputVarName;
 };
 
 }  // namespace graph
diff --git a/src/graph/planner/ngql/FetchVerticesPlanner.cpp b/src/graph/planner/ngql/FetchVerticesPlanner.cpp
index 55f47499e72..33b6f8a65ad 100644
--- a/src/graph/planner/ngql/FetchVerticesPlanner.cpp
+++ b/src/graph/planner/ngql/FetchVerticesPlanner.cpp
@@ -36,14 +36,19 @@ std::unique_ptr<FetchVerticesPlanner::VertexProps> FetchVerticesPlanner::buildVe
 StatusOr<SubPlan> FetchVerticesPlanner::transform(AstContext* astCtx) {
   fetchCtx_ = static_cast<FetchVerticesContext*>(astCtx);
   auto qctx = fetchCtx_->qctx;
+  auto space = fetchCtx_->space;
   auto& starts = fetchCtx_->from;
 
   std::string vidsVar;
-  if (starts.vids.empty() && starts.originalSrc == nullptr) {
+  if (!starts.vids.empty() && starts.originalSrc == nullptr) {
     PlannerUtil::buildConstantInput(qctx, starts, vidsVar);
   } else {
     starts.src = starts.originalSrc;
-    vidsVar = starts.userDefinedVarName;
+    if (starts.fromType == kVariable) {
+      vidsVar = starts.userDefinedVarName;
+    } else {
+      vidsVar = fetchCtx_->inputVarName;
+    }
   }
 
   SubPlan subPlan;
@@ -59,7 +64,7 @@ StatusOr<SubPlan> FetchVerticesPlanner::transform(AstContext* astCtx) {
 
   subPlan.root = Project::make(qctx, getVertices, fetchCtx_->yieldExpr);
   if (fetchCtx_->distinct) {
-    subPlan.root = Dedup::make(qctx, subPlan.root)
+    subPlan.root = Dedup::make(qctx, subPlan.root);
   }
   subPlan.tail = getVertices;
   return subPlan;
diff --git a/src/graph/planner/ngql/FetchVerticesPlanner.h b/src/graph/planner/ngql/FetchVerticesPlanner.h
index c5b8f9ed7d4..b24a7085233 100644
--- a/src/graph/planner/ngql/FetchVerticesPlanner.h
+++ b/src/graph/planner/ngql/FetchVerticesPlanner.h
@@ -41,3 +41,5 @@ class FetchVerticesPlanner final : public Planner {
 };
 }  // namespace graph
 }  // namespace nebula
+
+#endif  // GRAPH_PLANNER_NGQL_FETCH_VERTICES_PLANNER_H
diff --git a/src/graph/planner/ngql/GoPlanner.cpp b/src/graph/planner/ngql/GoPlanner.cpp
index 98893056ad8..4c1e56dcac8 100644
--- a/src/graph/planner/ngql/GoPlanner.cpp
+++ b/src/graph/planner/ngql/GoPlanner.cpp
@@ -487,7 +487,7 @@ StatusOr<SubPlan> GoPlanner::transform(AstContext* astCtx) {
   goCtx_->joinInput = goCtx_->from.fromType != FromType::kInstantExpr;
   goCtx_->joinDst = !goCtx_->exprProps.dstTagProps().empty();
 
-  SubPlan startPlan = Planner::buildStart(qctx, goCtx_->from, goCtx_->vidsVar);
+  SubPlan startPlan = PlannerUtil::buildStart(qctx, goCtx_->from, goCtx_->vidsVar);
 
   auto& steps = goCtx_->steps;
   if (steps.isMToN()) {
diff --git a/src/graph/util/ValidateUtil.cpp b/src/graph/util/ValidateUtil.cpp
index cd38cfb87ba..953c7b75ab2 100644
--- a/src/graph/util/ValidateUtil.cpp
+++ b/src/graph/util/ValidateUtil.cpp
@@ -12,7 +12,7 @@
 #include "graph/context/ast/QueryAstContext.h"
 #include "graph/planner/Planner.h"
 #include "graph/planner/plan/Query.h"
-#include "graph/util/ExpressionUtil.h"
+#include "graph/util/ExpressionUtils.h"
 
 namespace nebula {
 namespace graph {
@@ -74,7 +74,7 @@ Status ValidateUtil::validateOver(QueryContext* qctx, const OverClause* clause,
   return Status::OK();
 }
 
-Status ValidateUtil::invalidLabelIdentifiers(const Expression* expr) const {
+Status ValidateUtil::invalidLabelIdentifiers(const Expression* expr) {
   auto labelExprs = ExpressionUtils::collectAll(expr, {Expression::Kind::kLabel});
   if (!labelExprs.empty()) {
     std::stringstream ss;
diff --git a/src/graph/util/ValidateUtil.h b/src/graph/util/ValidateUtil.h
index 312b5da996e..ea532e166ad 100644
--- a/src/graph/util/ValidateUtil.h
+++ b/src/graph/util/ValidateUtil.h
@@ -7,11 +7,15 @@
 #ifndef GRAPH_UTIL_VALIDATE_UTIL_H_
 #define GRAPH_UTIL_VALIDATE_UTIL_H_
 #include "common/base/Base.h"
+#include "common/base/StatusOr.h"
+#include "common/expression/Expression.h"
+#include "parser/Clauses.h"
 
 namespace nebula {
 namespace graph {
 class QueryContext;
 class PlanNode;
+struct Over;
 
 class ValidateUtil final {
  public:
@@ -21,7 +25,7 @@ class ValidateUtil final {
 
   static Status validateOver(QueryContext* qctx, const OverClause* clause, Over& over);
 
-  static Status invalidLabelIdentifiers(const Expression* expr) const;
+  static Status invalidLabelIdentifiers(const Expression* expr);
 };
 
 }  // namespace graph
diff --git a/src/graph/validator/FetchEdgesValidator.cpp b/src/graph/validator/FetchEdgesValidator.cpp
index 5909e1bbc4a..888b8fb9748 100644
--- a/src/graph/validator/FetchEdgesValidator.cpp
+++ b/src/graph/validator/FetchEdgesValidator.cpp
@@ -9,6 +9,7 @@
 #include "graph/planner/plan/Query.h"
 #include "graph/util/ExpressionUtils.h"
 #include "graph/util/SchemaUtil.h"
+#include "graph/util/ValidateUtil.h"
 
 namespace nebula {
 namespace graph {
@@ -184,7 +185,7 @@ Status FetchEdgesValidator::preparePropertiesWithYield(const YieldClause *yield)
   dedup_ = newYield_->isDistinct();
   for (auto col : newYield_->columns()) {
     col->setExpr(ExpressionUtils::rewriteLabelAttr2EdgeProp(col->expr()));
-    NG_RETURN_IF_ERROR(invalidLabelIdentifiers(col->expr()));
+    NG_RETURN_IF_ERROR(ValidateUtil::invalidLabelIdentifiers(col->expr()));
     const auto *invalidExpr = findInvalidYieldExpression(col->expr());
     if (invalidExpr != nullptr) {
       return Status::SemanticError("Invalid newYield_ expression `%s'.",
diff --git a/src/graph/validator/FetchVerticesValidator.cpp b/src/graph/validator/FetchVerticesValidator.cpp
index 277cafaf1b6..9be40b0f040 100644
--- a/src/graph/validator/FetchVerticesValidator.cpp
+++ b/src/graph/validator/FetchVerticesValidator.cpp
@@ -8,7 +8,7 @@
 #include "graph/planner/plan/Query.h"
 #include "graph/util/ExpressionUtils.h"
 #include "graph/util/SchemaUtil.h"
-#include "graph/util/ValidateUtils.h"
+#include "graph/util/ValidateUtil.h"
 #include "graph/visitor/DeducePropsVisitor.h"
 
 namespace nebula {
@@ -18,13 +18,16 @@ static constexpr char VertexID[] = "VertexID";
 
 Status FetchVerticesValidator::validateImpl() {
   auto *fSentence = static_cast<FetchVerticesSentence *>(sentence_);
+  fetchCtx_ = getContext<FetchVerticesContext>();
+  fetchCtx_->inputVarName = inputVarName_;
+
   NG_RETURN_IF_ERROR(validateTag(fSentence->tags()));
-  NG_RETURN_IF_ERROR(validateStart(fSentence->vertices(), fetchCtx_->from));
+  NG_RETURN_IF_ERROR(validateStarts(fSentence->vertices(), fetchCtx_->from));
   NG_RETURN_IF_ERROR(validateYield(fSentence->yieldClause()));
   return Status::OK();
 }
 
-Status FetchVerticesValidator::validateTag(NameLabelList *nameLabels) {
+Status FetchVerticesValidator::validateTag(const NameLabelList *nameLabels) {
   if (nameLabels == nullptr) {
     // all tag
     const auto &tagStatus = qctx_->schemaMng()->getAllLatestVerTagSchema(space_.id);
@@ -34,14 +37,14 @@ Status FetchVerticesValidator::validateTag(NameLabelList *nameLabels) {
     }
   } else {
     auto labels = nameLabels->labels();
-    auto &schemaMng = qctx_->schemaMng();
+    auto *schemaMng = qctx_->schemaMng();
     for (const auto &label : labels) {
       auto tagStatus = schemaMng->toTagID(space_.id, *label);
       NG_RETURN_IF_ERROR(tagStatus);
       auto tagID = tagStatus.value();
       auto tagSchema = schemaMng->getTagSchema(space_.id, tagID);
       if (tagSchema == nullptr) {
-        return Status::SemanticError("No schema found for `%s'", nameLabel->c_str());
+        return Status::SemanticError("No schema found for `%s'", label->c_str());
       }
       tagsSchema_.emplace(tagID, tagSchema);
     }
@@ -51,22 +54,29 @@ Status FetchVerticesValidator::validateTag(NameLabelList *nameLabels) {
 
 Status FetchVerticesValidator::validateYield(YieldClause *yield) {
   auto pool = qctx_->objPool();
+  if (yield == nullptr) {
+    // version 3.0: return Status::SemanticError("No YIELD Clause");
+    auto *yieldColumns = new YieldColumns();
+    auto *vertex = new YieldColumn(VertexExpression::make(pool));
+    yieldColumns->addColumn(vertex);
+    yield = pool->add(new YieldClause(yieldColumns));
+  }
   fetchCtx_->distinct = yield->isDistinct();
 
-  auto size = yield->columns()->size();
-  outputs_.reverse(size + 1);  // VertexID
+  auto size = yield->columns().size();
+  outputs_.reserve(size + 1);  // VertexID
   outputs_.emplace_back(VertexID, vidType_);
 
-  auto &exprProps = fetctCtx_->exprProps;
+  auto &exprProps = fetchCtx_->exprProps;
   for (auto col : yield->columns()) {
     // yield vertex or id(vertex)
-    auto colExpr = col->expr();
-    col->setExpr(ExpressionUtils::rewriteLabelAttr2TagProp(colExpr));
-    NG_RETURN_IF_ERROR(ValidateUtil::invalidLabelIdentifiers(colExpr));
+    col->setExpr(ExpressionUtils::rewriteLabelAttr2TagProp(col->expr()));
+    NG_RETURN_IF_ERROR(ValidateUtil::invalidLabelIdentifiers(col->expr()));
 
+    auto colExpr = col->expr();
     auto typeStatus = deduceExprType(colExpr);
     NG_RETURN_IF_ERROR(typeStatus);
-    ouputs_.emplace_back(col->name(), typeStatus.value());
+    outputs_.emplace_back(col->name(), typeStatus.value());
 
     NG_RETURN_IF_ERROR(deduceProps(colExpr, exprProps));
   }
@@ -78,17 +88,17 @@ Status FetchVerticesValidator::validateYield(YieldClause *yield) {
     return Status::SemanticError("Unsupported src/dst property expression in yield.");
   }
 
-  for (const auto &tag : exprProps.tagNameIds()) {
-    if (tagsSchema_.find(tag.first) == tagsSchema_.end()) {
-      return Status::SemanticError("Mismatched tag `%s'", tag);
-    }
-  }
+  // for (const auto &tag : exprProps.tagNameIds()) {
+  //   if (tagsSchema_.find(tag.first) == tagsSchema_.end()) {
+  //     return Status::SemanticError("Mismatched tag `%s'", tag);
+  //   }
+  // }
   auto *newCols = pool->add(new YieldColumns());
   // TODO (will be deleted in version 3.0)
-  auto *col = new YieldColumn(InputPropertyExpression::make(pool, nebula::kVid), VertexID);
-  newCols->addColumn(col);
+  auto *vidCol = new YieldColumn(InputPropertyExpression::make(pool, nebula::kVid), VertexID);
+  newCols->addColumn(vidCol);
   for (const auto &col : yield->columns()) {
-    newCols->addColumn(col->clone()->release());
+    newCols->addColumn(col->clone().release());
   }
   fetchCtx_->yieldExpr = newCols;
   auto colNames = getOutColNames();
diff --git a/src/graph/validator/FetchVerticesValidator.h b/src/graph/validator/FetchVerticesValidator.h
index c90fd166019..fcacaa2578d 100644
--- a/src/graph/validator/FetchVerticesValidator.h
+++ b/src/graph/validator/FetchVerticesValidator.h
@@ -7,8 +7,9 @@
 #ifndef _VALIDATOR_FETCH_VERTICES_VALIDATOR_H_
 #define _VALIDATOR_FETCH_VERTICES_VALIDATOR_H_
 
+#include "graph/context/ast/QueryAstContext.h"
 #include "graph/validator/Validator.h"
-#include "parser/TraverseSentence.h"
+#include "parser/TraverseSentences.h"
 
 namespace nebula {
 namespace graph {
@@ -21,7 +22,7 @@ class FetchVerticesValidator final : public Validator {
  private:
   Status validateImpl() override;
 
-  Status validateTag(NameLabelList* nameLables);
+  Status validateTag(const NameLabelList* nameLables);
 
   Status validateYield(YieldClause* yield);
 
diff --git a/src/graph/validator/FindPathValidator.cpp b/src/graph/validator/FindPathValidator.cpp
index 9764dce4b25..2f4975149f9 100644
--- a/src/graph/validator/FindPathValidator.cpp
+++ b/src/graph/validator/FindPathValidator.cpp
@@ -9,6 +9,7 @@
 #include "common/expression/VariableExpression.h"
 #include "graph/planner/plan/Algo.h"
 #include "graph/planner/plan/Logic.h"
+#include "graph/util/ValidateUtil.h"
 
 namespace nebula {
 namespace graph {
@@ -22,7 +23,7 @@ Status FindPathValidator::validateImpl() {
 
   NG_RETURN_IF_ERROR(validateStarts(fpSentence->from(), pathCtx_->from));
   NG_RETURN_IF_ERROR(validateStarts(fpSentence->to(), pathCtx_->to));
-  NG_RETURN_IF_ERROR(validateOver(fpSentence->over(), pathCtx_->over));
+  NG_RETURN_IF_ERROR(ValidateUtil::validateOver(qctx_, fpSentence->over(), pathCtx_->over));
   NG_RETURN_IF_ERROR(validateWhere(fpSentence->where()));
   NG_RETURN_IF_ERROR(ValidateUtil::validateStep(fpSentence->step(), pathCtx_->steps));
 
diff --git a/src/graph/validator/FindPathValidator.h b/src/graph/validator/FindPathValidator.h
index 2cc367dc197..0f2d03a23ec 100644
--- a/src/graph/validator/FindPathValidator.h
+++ b/src/graph/validator/FindPathValidator.h
@@ -9,15 +9,14 @@
 
 #include "common/base/Base.h"
 #include "graph/context/ast/QueryAstContext.h"
-#include "graph/validator/TraversalValidator.h"
+#include "graph/validator/Validator.h"
 
 namespace nebula {
 namespace graph {
 
-class FindPathValidator final : public TraversalValidator {
+class FindPathValidator final : public Validator {
  public:
-  FindPathValidator(Sentence* sentence, QueryContext* context)
-      : TraversalValidator(sentence, context) {}
+  FindPathValidator(Sentence* sentence, QueryContext* context) : Validator(sentence, context) {}
 
  private:
   Status validateImpl() override;
diff --git a/src/graph/validator/GetSubgraphValidator.cpp b/src/graph/validator/GetSubgraphValidator.cpp
index 332932a48b1..ad1b6ac576c 100644
--- a/src/graph/validator/GetSubgraphValidator.cpp
+++ b/src/graph/validator/GetSubgraphValidator.cpp
@@ -14,6 +14,7 @@
 #include "graph/context/QueryExpressionContext.h"
 #include "graph/planner/plan/Logic.h"
 #include "graph/planner/plan/Query.h"
+#include "graph/util/ValidateUtil.h"
 #include "parser/TraverseSentences.h"
 
 namespace nebula {
diff --git a/src/graph/validator/GetSubgraphValidator.h b/src/graph/validator/GetSubgraphValidator.h
index 140c481178d..2b07970faec 100644
--- a/src/graph/validator/GetSubgraphValidator.h
+++ b/src/graph/validator/GetSubgraphValidator.h
@@ -8,15 +8,14 @@
 #define GRAPH_VALIDATOR_GETSUBGRAPHVALIDATOR_H_
 
 #include "graph/context/ast/QueryAstContext.h"
-#include "graph/validator/TraversalValidator.h"
+#include "graph/validator/Validator.h"
 #include "parser/Clauses.h"
 
 namespace nebula {
 namespace graph {
-class GetSubgraphValidator final : public TraversalValidator {
+class GetSubgraphValidator final : public Validator {
  public:
-  GetSubgraphValidator(Sentence* sentence, QueryContext* context)
-      : TraversalValidator(sentence, context) {}
+  GetSubgraphValidator(Sentence* sentence, QueryContext* context) : Validator(sentence, context) {}
 
  private:
   Status validateImpl() override;
diff --git a/src/graph/validator/GoValidator.cpp b/src/graph/validator/GoValidator.cpp
index f77720c183d..ed43b87d03c 100644
--- a/src/graph/validator/GoValidator.cpp
+++ b/src/graph/validator/GoValidator.cpp
@@ -10,6 +10,7 @@
 #include "common/expression/VariableExpression.h"
 #include "graph/planner/plan/Logic.h"
 #include "graph/util/ExpressionUtils.h"
+#include "graph/util/ValidateUtil.h"
 #include "graph/visitor/ExtractPropExprVisitor.h"
 #include "parser/TraverseSentences.h"
 
@@ -22,7 +23,7 @@ Status GoValidator::validateImpl() {
 
   NG_RETURN_IF_ERROR(ValidateUtil::validateStep(goSentence->stepClause(), goCtx_->steps));
   NG_RETURN_IF_ERROR(validateStarts(goSentence->fromClause(), goCtx_->from));
-  NG_RETURN_IF_ERROR(validateOver(goSentence->overClause(), goCtx_->over));
+  NG_RETURN_IF_ERROR(ValidateUtil::validateOver(qctx_, goSentence->overClause(), goCtx_->over));
   NG_RETURN_IF_ERROR(validateWhere(goSentence->whereClause()));
   NG_RETURN_IF_ERROR(validateYield(goSentence->yieldClause()));
   NG_RETURN_IF_ERROR(validateTruncate(goSentence->truncateClause()));
diff --git a/src/graph/validator/GoValidator.h b/src/graph/validator/GoValidator.h
index 140bf92530c..e2f97866b17 100644
--- a/src/graph/validator/GoValidator.h
+++ b/src/graph/validator/GoValidator.h
@@ -9,16 +9,16 @@
 
 #include "graph/context/ast/QueryAstContext.h"
 #include "graph/planner/plan/Query.h"
-#include "graph/validator/TraversalValidator.h"
+#include "graph/validator/Validator.h"
 
 namespace nebula {
 namespace graph {
-class GoValidator final : public TraversalValidator {
+class GoValidator final : public Validator {
  public:
   using VertexProp = nebula::storage::cpp2::VertexProp;
   using EdgeProp = nebula::storage::cpp2::EdgeProp;
 
-  GoValidator(Sentence* sentence, QueryContext* context) : TraversalValidator(sentence, context) {}
+  GoValidator(Sentence* sentence, QueryContext* context) : Validator(sentence, context) {}
 
  private:
   Status validateImpl() override;
diff --git a/src/graph/validator/MatchValidator.cpp b/src/graph/validator/MatchValidator.cpp
index 4d8823e6a33..d6f969cbdb4 100644
--- a/src/graph/validator/MatchValidator.cpp
+++ b/src/graph/validator/MatchValidator.cpp
@@ -13,7 +13,7 @@
 namespace nebula {
 namespace graph {
 MatchValidator::MatchValidator(Sentence *sentence, QueryContext *context)
-    : TraversalValidator(sentence, context) {
+    : Validator(sentence, context) {
   matchCtx_ = getContext<MatchAstContext>();
 }
 
diff --git a/src/graph/validator/MatchValidator.h b/src/graph/validator/MatchValidator.h
index 997744b2107..762589a2dc8 100644
--- a/src/graph/validator/MatchValidator.h
+++ b/src/graph/validator/MatchValidator.h
@@ -11,14 +11,14 @@
 #include "graph/context/ast/CypherAstContext.h"
 #include "graph/planner/plan/Query.h"
 #include "graph/util/AnonVarGenerator.h"
-#include "graph/validator/TraversalValidator.h"
+#include "graph/validator/Validator.h"
 
 namespace nebula {
 
 class MatchStepRange;
 class ObjectPool;
 namespace graph {
-class MatchValidator final : public TraversalValidator {
+class MatchValidator final : public Validator {
  public:
   MatchValidator(Sentence *sentence, QueryContext *context);
 
diff --git a/src/graph/validator/Validator.cpp b/src/graph/validator/Validator.cpp
index 8b33525f542..135e161a6f7 100644
--- a/src/graph/validator/Validator.cpp
+++ b/src/graph/validator/Validator.cpp
@@ -6,6 +6,8 @@
 
 #include "graph/validator/Validator.h"
 
+#include <thrift/lib/cpp/util/EnumUtils.h>
+
 #include "common/function/FunctionManager.h"
 #include "graph/planner/plan/Query.h"
 #include "graph/util/ExpressionUtils.h"
diff --git a/src/graph/validator/Validator.h b/src/graph/validator/Validator.h
index 2d7d6379b44..3b204af51ab 100644
--- a/src/graph/validator/Validator.h
+++ b/src/graph/validator/Validator.h
@@ -19,7 +19,7 @@
 
 namespace nebula {
 namespace graph {
-
+struct Starts;
 class Validator {
  public:
   virtual ~Validator() = default;
@@ -127,14 +127,12 @@ class Validator {
     return Status::OK();
   }
 
-  // Check the variable or input property reference
-  // return the input variable
-  StatusOr<std::string> checkRef(const Expression* ref, const Value::Type type);
-
   // Check the output for duplicate column names
   Status checkDuplicateColName();
 
-  Status invalidLabelIdentifiers(const Expression* expr) const;
+  // Check the variable or input property reference
+  // return the input variable
+  StatusOr<std::string> checkRef(const Expression* ref, const Value::Type type);
 
   Status validateStarts(const VerticesClause* clause, Starts& starts);
 
diff --git a/src/graph/validator/YieldValidator.cpp b/src/graph/validator/YieldValidator.cpp
index 73682d89078..e36c57f9271 100644
--- a/src/graph/validator/YieldValidator.cpp
+++ b/src/graph/validator/YieldValidator.cpp
@@ -10,6 +10,7 @@
 #include "graph/context/QueryContext.h"
 #include "graph/planner/plan/Query.h"
 #include "graph/util/ExpressionUtils.h"
+#include "graph/util/ValidateUtil.h"
 #include "parser/Clauses.h"
 #include "parser/TraverseSentences.h"
 
diff --git a/src/graph/validator/test/FetchVerticesTest.cpp b/src/graph/validator/test/FetchVerticesTest.cpp
index d574882b93c..ac2a210ddcd 100644
--- a/src/graph/validator/test/FetchVerticesTest.cpp
+++ b/src/graph/validator/test/FetchVerticesTest.cpp
@@ -40,9 +40,9 @@ TEST_F(FetchVerticesValidatorTest, FetchVerticesProp) {
     gv->setColNames({nebula::kVid, "person.name", "person.age"});
     // project
     auto yieldColumns = std::make_unique<YieldColumns>();
-    yieldColumns->addColumn(new YieldColumn(VertexExpression::make(pool), "vertices_"));
+    yieldColumns->addColumn(new YieldColumn(VertexExpression::make(pool), "VERTEX"));
     auto *project = Project::make(qctx, gv, yieldColumns.get());
-    project->setColNames({"vertices_"});
+    project->setColNames({"VERTEX"});
     auto result = Eq(qctx->plan()->root(), project);
     ASSERT_TRUE(result.ok()) << result;
   }