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by hkothari
3221 days ago
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If you are interested in the code behind this, I wrote an overview last month on the functionality and links to the different code that backs the improvements they talk about: http://hydronitrogen.com/spark-220-cost-based-optimizer-expl... There's a fair amount of overlap, but where the databricks article explains the techniques with charts and high level explanations, I go over the code instead. |
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