diff --git a/src/substrait/common/Io.cpp b/src/substrait/common/Io.cpp
index 51b2ec61..d017a58c 100644
--- a/src/substrait/common/Io.cpp
+++ b/src/substrait/common/Io.cpp
@@ -37,7 +37,7 @@ PlanFileEncoding detectEncoding(std::string_view content) {
 
 absl::StatusOr<::substrait::proto::Plan> loadPlanWithUnknownEncoding(
     std::string_view input_filename) {
-  auto contentOrError = textplan::readFromFile(input_filename);
+  auto contentOrError = textplan::readFromFile(input_filename.data());
   if (!contentOrError.ok()) {
     return contentOrError.status();
   }
diff --git a/src/substrait/common/tests/IoTest.cpp b/src/substrait/common/tests/IoTest.cpp
index 157cc5cf..a9e7f13f 100644
--- a/src/substrait/common/tests/IoTest.cpp
+++ b/src/substrait/common/tests/IoTest.cpp
@@ -25,6 +25,7 @@ constexpr const char* planFileEncodingToString(PlanFileEncoding e) noexcept {
     case PlanFileEncoding::kText:
       return "kText";
   }
+  return "IMPOSSIBLE";
 }
 
 } // namespace
diff --git a/src/substrait/textplan/converter/LoadBinary.cpp b/src/substrait/textplan/converter/LoadBinary.cpp
index 3c6b315b..65e5694c 100644
--- a/src/substrait/textplan/converter/LoadBinary.cpp
+++ b/src/substrait/textplan/converter/LoadBinary.cpp
@@ -52,7 +52,7 @@ absl::StatusOr<std::string> readFromFile(std::string_view msgPath) {
   return buffer.str();
 }
 
-absl::StatusOr<::substrait::proto::Plan> loadFromJson(std::string_view json) {
+absl::StatusOr<::substrait::proto::Plan> loadFromJson(const std::string& json) {
   if (json.empty()) {
     return absl::InternalError("Provided JSON string was empty.");
   }
@@ -76,7 +76,7 @@ absl::StatusOr<::substrait::proto::Plan> loadFromJson(std::string_view json) {
 }
 
 absl::StatusOr<::substrait::proto::Plan> loadFromProtoText(
-    std::string_view text) {
+    const std::string& text) {
   ::substrait::proto::Plan plan;
   ::google::protobuf::TextFormat::Parser parser;
   StringErrorCollector collector;
@@ -89,7 +89,7 @@ absl::StatusOr<::substrait::proto::Plan> loadFromProtoText(
 }
 
 absl::StatusOr<::substrait::proto::Plan> loadFromBinary(
-    std::string_view bytes) {
+    const std::string& bytes) {
   ::substrait::proto::Plan plan;
   if (!plan.ParseFromString(bytes)) {
     return absl::InternalError("Failed to parse as a binary Substrait plan.");
diff --git a/src/substrait/textplan/converter/LoadBinary.h b/src/substrait/textplan/converter/LoadBinary.h
index 8c8bdb5c..a4d4e38f 100644
--- a/src/substrait/textplan/converter/LoadBinary.h
+++ b/src/substrait/textplan/converter/LoadBinary.h
@@ -17,15 +17,16 @@ absl::StatusOr<std::string> readFromFile(std::string_view msgPath);
 
 // Reads a plan from a json-encoded text proto.
 // Returns a list of errors if the file cannot be parsed.
-absl::StatusOr<::substrait::proto::Plan> loadFromJson(std::string_view json);
+absl::StatusOr<::substrait::proto::Plan> loadFromJson(const std::string& json);
 
 // Reads a plan encoded as a text protobuf.
 // Returns a list of errors if the file cannot be parsed.
 absl::StatusOr<::substrait::proto::Plan> loadFromProtoText(
-    std::string_view text);
+    const std::string& text);
 
 // Reads a plan serialized as a binary protobuf.
 // Returns a list of errors if the file cannot be parsed.
-absl::StatusOr<::substrait::proto::Plan> loadFromBinary(std::string_view bytes);
+absl::StatusOr<::substrait::proto::Plan> loadFromBinary(
+    const std::string& bytes);
 
 } // namespace io::substrait::textplan
diff --git a/src/substrait/textplan/parser/LoadText.cpp b/src/substrait/textplan/parser/LoadText.cpp
index ee2c7078..0850befe 100644
--- a/src/substrait/textplan/parser/LoadText.cpp
+++ b/src/substrait/textplan/parser/LoadText.cpp
@@ -9,7 +9,7 @@
 
 namespace io::substrait::textplan {
 
-absl::StatusOr<::substrait::proto::Plan> loadFromText(std::string_view text) {
+absl::StatusOr<::substrait::proto::Plan> loadFromText(const std::string& text) {
   auto stream = loadTextString(text);
   auto parseResult = io::substrait::textplan::parseStream(stream);
   if (!parseResult.successful()) {
diff --git a/src/substrait/textplan/parser/LoadText.h b/src/substrait/textplan/parser/LoadText.h
index a5894731..3b2f900b 100644
--- a/src/substrait/textplan/parser/LoadText.h
+++ b/src/substrait/textplan/parser/LoadText.h
@@ -3,7 +3,6 @@
 #pragma once
 
 #include <absl/status/statusor.h>
-#include <string_view>
 
 namespace substrait::proto {
 class Plan;
@@ -13,6 +12,6 @@ namespace io::substrait::textplan {
 
 // Reads a plan encoded as a text protobuf.
 // Returns a list of errors if the text cannot be parsed.
-absl::StatusOr<::substrait::proto::Plan> loadFromText(std::string_view text);
+absl::StatusOr<::substrait::proto::Plan> loadFromText(const std::string& text);
 
 } // namespace io::substrait::textplan