diff --git a/velox/expression/CastExpr.cpp b/velox/expression/CastExpr.cpp
index ea616d8f58d9..cec4df1bef5e 100644
--- a/velox/expression/CastExpr.cpp
+++ b/velox/expression/CastExpr.cpp
@@ -300,7 +300,7 @@ VectorPtr CastExpr::applyMap(
         mapKeys->size(), rows, input, context.pool());
   }
 
-  EvalCtx::ErrorVectorPtr oldErrors;
+  ErrorVectorPtr oldErrors;
   context.swapErrors(oldErrors);
 
   // Cast keys
@@ -362,7 +362,7 @@ VectorPtr CastExpr::applyArray(
   auto elementToTopLevelRows = functions::getElementToTopLevelRows(
       arrayElements->size(), rows, input, context.pool());
 
-  EvalCtx::ErrorVectorPtr oldErrors;
+  ErrorVectorPtr oldErrors;
   context.swapErrors(oldErrors);
 
   VectorPtr newElements;
diff --git a/velox/expression/ConjunctExpr.cpp b/velox/expression/ConjunctExpr.cpp
index 20e2e45f5e1d..e8dcadc33a25 100644
--- a/velox/expression/ConjunctExpr.cpp
+++ b/velox/expression/ConjunctExpr.cpp
@@ -25,7 +25,7 @@ uint64_t* rowsWithError(
     const SelectivityVector& rows,
     const SelectivityVector& activeRows,
     EvalCtx& context,
-    EvalCtx::ErrorVectorPtr& previousErrors,
+    ErrorVectorPtr& previousErrors,
     LocalSelectivityVector& errorRowsHolder) {
   auto errors = context.errors();
   if (!errors) {
@@ -126,7 +126,7 @@ void ConjunctExpr::evalSpecialForm(
   for (int32_t i = 0; i < inputs_.size(); ++i) {
     VectorPtr inputResult;
     VectorRecycler inputResultRecycler(inputResult, context.vectorPool());
-    EvalCtx::ErrorVectorPtr errors;
+    ErrorVectorPtr errors;
     if (handleErrors) {
       context.swapErrors(errors);
     }
diff --git a/velox/expression/EvalCtx.h b/velox/expression/EvalCtx.h
index 4164ad36ae06..bd25ebcc63f5 100644
--- a/velox/expression/EvalCtx.h
+++ b/velox/expression/EvalCtx.h
@@ -101,13 +101,6 @@ class EvalCtx {
     });
   }
 
-  // Error vector uses an opaque flat vector to store std::exception_ptr.
-  // Since opaque types are stored as shared_ptr<void>, this ends up being a
-  // double pointer in the form of std::shared_ptr<std::exception_ptr>. This is
-  // fine since we only need to actually follow the pointer in failure cases.
-  using ErrorVector = FlatVector<std::shared_ptr<void>>;
-  using ErrorVectorPtr = std::shared_ptr<ErrorVector>;
-
   // Sets the error at 'index' in '*errorPtr' if the value is
   // null. Creates and resizes '*errorPtr' as needed and initializes
   // new positions to null.
@@ -320,7 +313,7 @@ struct ScopedContextSaver {
   // The selection of the context being saved.
   const SelectivityVector* FOLLY_NONNULL rows;
   const SelectivityVector* FOLLY_NULLABLE finalSelection;
-  EvalCtx::ErrorVectorPtr errors;
+  ErrorVectorPtr errors;
 };
 
 /// Produces a SelectivityVector with a single row selected using a pool of
diff --git a/velox/expression/Expr.h b/velox/expression/Expr.h
index 1d7e486f9723..53b0757c0a9b 100644
--- a/velox/expression/Expr.h
+++ b/velox/expression/Expr.h
@@ -649,7 +649,7 @@ class ExprSetListener {
   /// @param errors Error vector produced inside the try expression.
   virtual void onError(
       const SelectivityVector& rows,
-      const EvalCtx::ErrorVector& errors) = 0;
+      const ErrorVector& errors) = 0;
 };
 
 /// Return the ExprSetListeners having been registered.
diff --git a/velox/expression/LambdaExpr.cpp b/velox/expression/LambdaExpr.cpp
index 2b9358dc02c7..1a88f59972fe 100644
--- a/velox/expression/LambdaExpr.cpp
+++ b/velox/expression/LambdaExpr.cpp
@@ -63,7 +63,7 @@ class ExprCallable : public Callable {
       const BufferPtr& wrapCapture,
       EvalCtx* context,
       const std::vector<VectorPtr>& args,
-      EvalCtx::ErrorVectorPtr& elementErrors,
+      ErrorVectorPtr& elementErrors,
       VectorPtr* result) override {
     auto row = createRowVector(context, wrapCapture, args, rows.end());
     EvalCtx lambdaCtx = createLambdaCtx(context, row, finalSelection);
diff --git a/velox/expression/TryExpr.cpp b/velox/expression/TryExpr.cpp
index f187c56af7f1..a6662054d882 100644
--- a/velox/expression/TryExpr.cpp
+++ b/velox/expression/TryExpr.cpp
@@ -31,8 +31,7 @@ void TryExpr::evalSpecialForm(
   // This also prevents this TRY expression from leaking exceptions to the
   // parent TRY expression, so the parent won't incorrectly null out rows that
   // threw exceptions which this expression already handled.
-  ScopedVarSetter<EvalCtx::ErrorVectorPtr> errorsSetter(
-      context.errorsPtr(), nullptr);
+  ScopedVarSetter<ErrorVectorPtr> errorsSetter(context.errorsPtr(), nullptr);
   inputs_[0]->eval(rows, context, result);
 
   nullOutErrors(rows, context, result);
@@ -51,8 +50,7 @@ void TryExpr::evalSpecialFormSimplified(
   // This also prevents this TRY expression from leaking exceptions to the
   // parent TRY expression, so the parent won't incorrectly null out rows that
   // threw exceptions which this expression already handled.
-  ScopedVarSetter<EvalCtx::ErrorVectorPtr> errorsSetter(
-      context.errorsPtr(), nullptr);
+  ScopedVarSetter<ErrorVectorPtr> errorsSetter(context.errorsPtr(), nullptr);
   inputs_[0]->evalSimplified(rows, context, result);
 
   nullOutErrors(rows, context, result);
diff --git a/velox/expression/tests/EvalCtxTest.cpp b/velox/expression/tests/EvalCtxTest.cpp
index d2c0cf748170..d641da1b163e 100644
--- a/velox/expression/tests/EvalCtxTest.cpp
+++ b/velox/expression/tests/EvalCtxTest.cpp
@@ -161,7 +161,7 @@ TEST_F(EvalCtxTest, addErrorsPreserveOldErrors) {
   ASSERT_EQ(BaseVector::countNulls(context.errors()->nulls(), 4), 2);
 
   // Add two out_of_range to anotherErrors.
-  EvalCtx::ErrorVectorPtr anotherErrors;
+  ErrorVectorPtr anotherErrors;
   std::out_of_range rangeError{"out of range"};
   context.addError(0, std::make_exception_ptr(rangeError), anotherErrors);
   context.addError(4, std::make_exception_ptr(rangeError), anotherErrors);
diff --git a/velox/expression/tests/ExprStatsTest.cpp b/velox/expression/tests/ExprStatsTest.cpp
index 00ebf186489a..51c79a9c1abb 100644
--- a/velox/expression/tests/ExprStatsTest.cpp
+++ b/velox/expression/tests/ExprStatsTest.cpp
@@ -174,7 +174,7 @@ class TestListener : public exec::ExprSetListener {
 
   void onError(
       const SelectivityVector& rows,
-      const ::facebook::velox::exec::EvalCtx::ErrorVector& errors) override {
+      const ::facebook::velox::ErrorVector& errors) override {
     rows.applyToSelected([&](auto row) {
       exceptionCount_++;
 
diff --git a/velox/expression/tests/ExpressionFuzzer.h b/velox/expression/tests/ExpressionFuzzer.h
index bda1fb9b943d..875152c63c7f 100644
--- a/velox/expression/tests/ExpressionFuzzer.h
+++ b/velox/expression/tests/ExpressionFuzzer.h
@@ -132,8 +132,7 @@ class ExpressionFuzzer {
     // occurred.
     void onError(
         const SelectivityVector& /*rows*/,
-        const ::facebook::velox::exec::EvalCtx::ErrorVector& /*errors*/)
-        override {}
+        const ::facebook::velox::ErrorVector& /*errors*/) override {}
 
    private:
     std::unordered_map<std::string, ExprUsageStats>& exprNameToStats_;
diff --git a/velox/functions/prestosql/ArrayAllMatch.cpp b/velox/functions/prestosql/ArrayAllMatch.cpp
index 392e5c8ff480..397e8db2bc0d 100644
--- a/velox/functions/prestosql/ArrayAllMatch.cpp
+++ b/velox/functions/prestosql/ArrayAllMatch.cpp
@@ -60,7 +60,7 @@ class AllMatchFunction : public exec::VectorFunction {
     auto it = args[1]->asUnchecked<FunctionVector>()->iterator(&rows);
 
     while (auto entry = it.next()) {
-      exec::EvalCtx::ErrorVectorPtr elementErrors;
+      ErrorVectorPtr elementErrors;
       auto elementRows =
           toElementRows<ArrayVector>(numElements, *entry.rows, flatArray.get());
       auto wrapCapture = toWrapCapture<ArrayVector>(
@@ -125,7 +125,7 @@ class AllMatchFunction : public exec::VectorFunction {
 
  private:
   FOLLY_ALWAYS_INLINE bool hasError(
-      const exec::EvalCtx::ErrorVectorPtr& elementErrors,
+      const ErrorVectorPtr& elementErrors,
       int idx) const {
     return elementErrors && idx < elementErrors->size() &&
         !elementErrors->isNullAt(idx);
diff --git a/velox/functions/prestosql/types/JsonType.cpp b/velox/functions/prestosql/types/JsonType.cpp
index 65227a7b9ce0..6b10cae1d4bc 100644
--- a/velox/functions/prestosql/types/JsonType.cpp
+++ b/velox/functions/prestosql/types/JsonType.cpp
@@ -169,7 +169,7 @@ struct AsJson {
       const BufferPtr& elementToTopLevelRows,
       bool isMapKey = false)
       : decoded_(context, *input, rows) {
-    exec::EvalCtx::ErrorVectorPtr oldErrors;
+    ErrorVectorPtr oldErrors;
     context.swapErrors(oldErrors);
 
     if (isMapKey && decoded_->mayHaveNulls()) {
@@ -272,7 +272,7 @@ struct AsJson {
       exec::EvalCtx& context,
       const SelectivityVector& rows,
       const BufferPtr& elementToTopLevelRows,
-      exec::EvalCtx::ErrorVectorPtr& oldErrors) {
+      ErrorVectorPtr& oldErrors) {
     if (context.errors()) {
       if (elementToTopLevelRows) {
         context.addElementErrorsToTopLevel(
diff --git a/velox/vector/FlatVector.h b/velox/vector/FlatVector.h
index 75335119fe42..0ea0475c9f8f 100644
--- a/velox/vector/FlatVector.h
+++ b/velox/vector/FlatVector.h
@@ -509,6 +509,13 @@ void FlatVector<StringView>::prepareForReuse();
 template <typename T>
 using FlatVectorPtr = std::shared_ptr<FlatVector<T>>;
 
+// Error vector uses an opaque flat vector to store std::exception_ptr.
+// Since opaque types are stored as shared_ptr<void>, this ends up being a
+// double pointer in the form of std::shared_ptr<std::exception_ptr>. This is
+// fine since we only need to actually follow the pointer in failure cases.
+using ErrorVector = FlatVector<std::shared_ptr<void>>;
+using ErrorVectorPtr = std::shared_ptr<ErrorVector>;
+
 } // namespace facebook::velox
 
 #include "velox/vector/FlatVector-inl.h"
diff --git a/velox/vector/FunctionVector.h b/velox/vector/FunctionVector.h
index d098237704f5..59a05f95c475 100644
--- a/velox/vector/FunctionVector.h
+++ b/velox/vector/FunctionVector.h
@@ -20,6 +20,10 @@
 
 namespace facebook::velox {
 
+namespace exec {
+class EvalCtx;
+} // namespace exec
+
 // Represents a function with possible captures.
 class Callable {
  public:
@@ -61,7 +65,7 @@ class Callable {
       const BufferPtr& wrapCapture,
       exec::EvalCtx* context,
       const std::vector<VectorPtr>& args,
-      exec::EvalCtx::ErrorVectorPtr& elementErrors,
+      ErrorVectorPtr& elementErrors,
       VectorPtr* result) = 0;
 };