a627e7fce7
fix for exporter issue 633: https://github.com/prometheus-community/postgres_exporter/issues/633 "Scan error on column index 2, name \"checkpoint_write_time\": converting driver.Value type float64 (\"6.594096e+06\") to a int: invalid syntax #633" Signed-off-by: bravosierrasierra <bravosierrasierra@users.noreply.github.com>