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Commit 58d9b260 authored by Davies Liu's avatar Davies Liu Committed by Josh Rosen
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[SPARK-11805] free the array in UnsafeExternalSorter during spilling 

After calling spill() on SortedIterator, the array inside InMemorySorter is not needed, it should be freed during spilling, this could help to join multiple tables with limited memory.

Author: Davies Liu <davies@databricks.com>

Closes #9793 from davies/free_array.
parent e6dd2374
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