datafusion-distributed 2.0.0

Framework for enhancing Apache DataFusion with distributed capabilities
Documentation 
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use std::time::{SystemTime, UNIX_EPOCH};

/// Nanoseconds elapsed since UNIX epoch.
pub(crate) fn now_ns() -> u64 {
    SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .map(|duration| duration.as_nanos() as u64)
        .expect("SystemTime before UNIX EPOCH!")
}