[Podcast] The Brain Inside Your Database скачать в хорошем качестве

[Podcast] The Brain Inside Your Database

https://arxiv.org/pdf/2101.01507 This paper provides a comprehensive survey of modern database query optimizers, focusing on the three essential pillars of cardinality estimation, cost modeling, and plan enumeration. The authors analyze why traditional cost-based systems often struggle with complex queries, citing issues like error propagation in multi-join scenarios and the exponential search space of join orders. To address these limitations, the text categorizes various advancements into synopsis-based, sampling-based, and learning-based methodologies. Special attention is given to the rise of machine learning and reinforcement learning as transformative tools for predicting query performance and automating optimization logic. Ultimately, the sources highlight a significant shift toward data-driven models while outlining remaining challenges such as high training overhead and adapting to dynamic workloads. Disclaimer: This video is generated with Google's NotebookLM. #research #database