Navigating Row_Number() Non-Idempotency

Nnaemezue Obi-Eyisi
2 min readAug 16, 2023

In the realm of data engineering, challenges often present themselves in the most unexpected ways. Recently, I embarked on a journey with Databricks that led me to an intricate puzzle — one that took days of exploration and experimentation to crack: the enigmatic non-idempotency of the Row_Number() window function.

My goal seemed deceptively straightforward: process data in manageable 100-record chunks and dispatch these packets as messages to a designated message queue. This operation was driven by the memory limitations of the message queue system…

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Nnaemezue Obi-Eyisi

I am passionate about empowering, educating, and encouraging individuals pursuing a career in data engineering. Currently a Senior Data Engineer at Capgemini