diff --git a/src/common/data_chunk/sel_vector.cpp b/src/common/data_chunk/sel_vector.cpp
new file mode 100644
index 00000000000..c3b3e82c5ac
--- /dev/null
+++ b/src/common/data_chunk/sel_vector.cpp
@@ -0,0 +1,15 @@
+#include "common/data_chunk/sel_vector.h"
+
+namespace kuzu {
+namespace common {
+
+void SelectionVector::setCapacityAndToValuePosBuffer(sel_t capacity) {
+    selectedPositionsBuffer = std::make_unique<sel_t[]>(capacity);
+    resetSelectorToValuePosBuffer();
+    for (auto i = 0u; i < capacity; i++) {
+        selectedPositionsBuffer[i] = i;
+    }
+}
+
+} // namespace common
+} // namespace kuzu