Details
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Improvement
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Status: Closed
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Major
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Resolution: Fixed
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v2.0.0
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None
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None
Description
In KYLIN-1851, we introduce a new sorting key "SelfDefineSortableKey" in kylin because the new dictionary needs ordered input value. But recently we found that when users apply dictionary encoding to a double type column, the sorting procedure of SelfDefineSortableKey is very slow. So some optimization need to be made to fix that.