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Please refer to added tests for cases that can trigger the bug. JIRA: https://issues.apache.org/jira/browse/SPARK-4068 Author: Yin Huai <huai@cse.ohio-state.edu> Closes #2918 from yhuai/SPARK-4068 and squashes the following commits: d360eae [Yin Huai] Handle nulls when building key paths from elements of an array. |
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