Fixed #132

converter.go

@@ -167,7 +167,7 @@ func extractTimestamp(srcValue *string) (sec int64, nsec int64, err error) {
 func stringToValue(dest *driver.Value, srcColumnMeta execResponseRowType, srcValue *string) error {
 	if srcValue == nil {
 		glog.V(3).Infof("snowflake data type: %v, raw value: nil", srcColumnMeta.Type)
-		dest = nil
+		*dest = nil
 		return nil
 	}
 	glog.V(3).Infof("snowflake data type: %v, raw value: %v", srcColumnMeta.Type, *srcValue)

driver_test.go

@@ -1752,6 +1752,26 @@ func TestValidateDatabaseParameter(t *testing.T) {
 	}
 }
 
+func TestFetchNil(t *testing.T) {
+	runTests(t, dsn, func(dbt *DBTest) {
+		rows := dbt.mustQuery("SELECT * FROM values(3,4),(null, 5) order by 2")
+		defer rows.Close()
+		var c1 sql.NullInt64
+		var c2 sql.NullInt64
+
+		var results []sql.NullInt64
+		for rows.Next() {
+			err := rows.Scan(&c1, &c2)
+			if err != nil {
+				dbt.Fatal(err)
+			}
+			results = append(results, c1)
+		}
+		if results[1].Valid {
+			t.Errorf("First element of second row must be nil (NULL). %v", results)
+		}
+	})
+}
 func init() {
 	if !flag.Parsed() {
 		flag.Parse()