Add config to collect statistics, enable in TPC-H benchmark #796
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Dandandan
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Which issue does this PR close?
Closes #797
Allows configuring the
CollectLeftthreshold in Ballista and enable collecting statistics in TPC-H benchmark.(2,5,7,8,9,10,11,14,15,16,21 are faster with statistics available because of better join selection)
Rationale for this change
What changes are included in this PR?
Are there any user-facing changes?