def insert_metric_changes(db, metrics, metric_mapping, commit):
    """Insert into the metric_changes tables.

    :param metrics: `list` of `Metric` objects
    :param dict metric_mapping: Maps metric names to ids
    :param Commit commit:
    """
    values = [
        [commit.sha, metric_mapping[metric.name], metric.value]
        for metric in metrics
        if metric.value != 0
    ]
    db.executemany(
        'INSERT INTO metric_changes (sha, metric_id, value) VALUES (?, ?, ?)',
        values,
    )
Insert into the metric_changes tables.

    :param metrics: `list` of `Metric` objects
    :param dict metric_mapping: Maps metric names to ids
    :param Commit commit: