Hi, Can we support loser tree first and set the default value of enable_loser_tree to off?
Anyway, I attach 2 patches. (pass check-world) v2-0001: support tuplesort_heap_build() which can build a valid heap in O(n), better than currently O(n log n). This also make beginmerge() more clear and simple when supporting loser tree. v2-0002: support the loser tree. -- Regards, ChangAo Chen
v2-0001-Support-tuplesort_heap_build-in-tuplesort.c.patch
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v2-0002-Support-loser-tree-for-k-way-merge.patch
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