HIVE-29365: Range predicate within the same histogram bucket leads to an estimate rowcount=1#6319
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thomasrebele wants to merge 1 commit intoapache:masterfrom
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HIVE-29365: Range predicate within the same histogram bucket leads to an estimate rowcount=1#6319thomasrebele wants to merge 1 commit intoapache:masterfrom
thomasrebele wants to merge 1 commit intoapache:masterfrom
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… an estimate rowcount=1
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What changes were proposed in this pull request?
Take the error of the KLL sketch into account when estimating a selectivity.
Why are the changes needed?
Without the change, some rowcounts are underestimated by several orders of magnitude.
Does this PR introduce any user-facing change?
No
How was this patch tested?
Unit test TestFilterSelectivityEstimator.