xianyinxin opened a new pull request #24983: [SPARK-27714][SQL][CBO] Support Genetic Algorithm based join reorder URL: https://github.com/apache/spark/pull/24983 ## What changes were proposed in this pull request? Now the join reorder logic is based on dynamic planning which can find the most optimized plan theoretically, but the searching cost grows rapidly with the # of joined tables grows. This work introduce Genetic Algorithm (GA) based join reordering implementation in CBO. ## How was this patch tested? New UTs is added.
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