--- /dev/null
+#ifndef POSTGRESQL_UTILS_STORE_H
+#define POSTGRESQL_UTILS_STORE_H
+
+#include <functional>
+
+struct ToLower : public std::unary_function<char, char>
+{
+char operator() (char c) const { return static_cast<char>(std::tolower(c)); }
+};
+
+#endif