[SPARK-50686][SQL] Hash to sort aggregation fallback - memory usage optimization #51290
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…n fallback scenario adjust expected spill values in tests
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What changes were proposed in this pull request?
Added deallocation of internal array which is redundant in certain hash to sort aggregation fallback scenarios
Why are the changes needed?
Under memory pressure, allocation of new internal structures is oom-prone. So, it is better to get rid of all the redundant structures at that point to reduce the risk.
Does this PR introduce any user-facing change?
No
How was this patch tested?
UnsafeKVExternalSuite spilling tests have been adjusted to the reduced spilled memory introduced by the change.
Was this patch authored or co-authored using generative AI tooling?
No