diff --git a/src/backend/gpopt/translate/CTranslatorUtils.cpp b/src/backend/gpopt/translate/CTranslatorUtils.cpp
index 3423621a78ed..1d2a980a4764 100644
--- a/src/backend/gpopt/translate/CTranslatorUtils.cpp
+++ b/src/backend/gpopt/translate/CTranslatorUtils.cpp
@@ -387,8 +387,8 @@ CTranslatorUtils::ResolvePolymorphicTypes(CMemoryPool *mp,
 	const ULONG num_args = std::min(num_arg_types, num_args_from_query);
 	const ULONG total_args = num_args + num_return_args;
 
-	OID arg_types[total_args];
-	char arg_modes[total_args];
+	std::vector<OID> arg_types(total_args);
+	std::vector<char> arg_modes(total_args);
 
 	// copy the first 'num_args' function argument types
 	ListCell *arg_type = nullptr;
@@ -410,8 +410,8 @@ CTranslatorUtils::ResolvePolymorphicTypes(CMemoryPool *mp,
 		arg_modes[arg_index++] = PROARGMODE_TABLE;
 	}
 
-	if (!gpdb::ResolvePolymorphicArgType(total_args, arg_types, arg_modes,
-										 funcexpr))
+	if (!gpdb::ResolvePolymorphicArgType(total_args, arg_types.data(),
+										 arg_modes.data(), funcexpr))
 	{
 		GPOS_RAISE(
 			gpdxl::ExmaDXL, gpdxl::ExmiDXLUnrecognizedType,
diff --git a/src/backend/gpopt/utils/COptTasks.cpp b/src/backend/gpopt/utils/COptTasks.cpp
index 541389be2951..56dec50c3a09 100644
--- a/src/backend/gpopt/utils/COptTasks.cpp
+++ b/src/backend/gpopt/utils/COptTasks.cpp
@@ -987,14 +987,15 @@ COptTasks::PrintMissingStatsWarning(CMemoryPool *mp, CMDAccessor *md_accessor,
 
 	if (0 < rel_stats->Size())
 	{
-		int length = NAMEDATALEN * rel_stats->Size() + 200;
-		char msgbuf[length];
-		snprintf(
-			msgbuf, sizeof(msgbuf),
-			"One or more columns in the following table(s) do not have statistics: %s",
-			CreateMultiByteCharStringFromWCString(wcstr.GetBuffer()));
+		CWStringDynamic msgbuf(mp);
+		msgbuf.AppendFormat(
+			GPOS_WSZ_LIT(
+				"One or more columns in the following table(s) do not have statistics: %ls"),
+			wcstr.GetBuffer());
+
 		GpdbEreport(
-			ERRCODE_SUCCESSFUL_COMPLETION, NOTICE, msgbuf,
+			ERRCODE_SUCCESSFUL_COMPLETION, NOTICE,
+			CreateMultiByteCharStringFromWCString(msgbuf.GetBuffer()),
 			"For non-partitioned tables, run analyze <table_name>(<column_list>)."
 			" For partitioned tables, run analyze rootpartition <table_name>(<column_list>)."
 			" See log for columns missing statistics.");