--- a/src/ResultSet.cpp	Sat Oct 24 00:08:19 2020 +0200
+++ b/src/ResultSet.cpp	Mon Oct 26 00:00:35 2020 +0100
@@ -55,7 +55,7 @@
 	// TODO: get integer directly from SQLGetData() without string conversion
 	relpipe::writer::string_t s = getString(columnNumber, isNull);
 	if (isNull && *isNull) return 0;
-	else return std::stol(s);
+	else return std::stoll(s);
 }
 
 relpipe::writer::string_t ResultSet::getString(unsigned short columnNumber, bool* isNull) {