pub async fn prepare(ctx) {
    ctx.data.tags = fs::read_resource_lines("variable_words.txt")?;
    ctx.prepare(READ,
        `SELECT * FROM ${KEYSPACE}.${TABLE}
         WHERE time = ? OR lc = ? OR value = ? OR tag = ? LIMIT ${READ_SIZE}`).await?;
}

pub async fn run(ctx, i) {
    let low = hash_range(i, ROW_COUNT) * 1000;
    let lc = normal(i, 2.2, 2.5).clamp(0.0, 5.0).to_i32();
    let value = normal(i, 125.0, 25.0).clamp(0.0, 200.0).to_i32();
    let tag = hash_select(i, ctx.data.tags);
    ctx.execute_prepared(READ, [low, lc, value, tag]).await?;
}