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[NSE-42] early release sort input #43
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What changes were proposed in this pull request?
partially fixes: #42
this patch tries to close sort input when there's no next result in sort result iterator. In cases like columnar WSCG, this can help to release the memory on the first consumer operator of columnar sort, instead of waiting for the last operator to release all batches.
Signed-off-by: Yuan Zhou [email protected]
How was this patch tested?
verified locally