It’s time we talked about time: Exploring Watermarks and more in Flink SQL
Whether you’re processing data in batch or as a stream, the concept of time is an important part of accurate processing logic.
Because we process data after it happens, there are a minimum of two different types of time to consider:
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When it happened, known as Event Time
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When we process it, known as Processing Time (or system time or wall clock time)
