Struct ArraySliceExec 

pub struct ArraySliceExec {
    pub rows: Vec<Vec<u8>>,
    pub truncated_before_horizon: bool,
}

Result of a local shard slice: the per-row bytes plus the bitemporal below-horizon signal.

truncated_before_horizon is computed by the Data Plane (it is true when the system_time cutoff predates every stored tile version, so the shard produced zero rows for that reason). It MUST be threaded back to the coordinator so the OR-reduce across shards can surface an incomplete-result signal to the client — dropping it would silently report complete results.

Fields

rows: Vec<Vec<u8>>

truncated_before_horizon: bool