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Data & Analytics · Advanced

Late-Arriving Data

Records that arrive after the window or batch for their event time has already been processed.

Definition

Late data is handled by allowed lateness and watermarks in streaming, by reprocessing partitions in batch, or by placeholder 'unknown' dimension members for late-arriving dimensions.

Exam tip

A fact row that arrives before its dimension row is handled with an inferred (unknown) dimension member.

Related terms