amitme10 commented on issue #3864:
URL: https://github.com/apache/druid/issues/3864#issuecomment-657661447
Is there any option to tune the cardinality estimation (accuracy) ?
As I see in DataSketches HLL Sketch module
`
{
"type" : "HLLSketchBuild",
"name" : <output name>,
"fieldName" : <metric name>,
"**lgK**" : <size and accuracy parameter>,
"tgtHllType" : <target HLL type>,
"round": <false | true>
}
{
"type" : "HLLSketchMerge",
"name" : <output name>,
"fieldName" : <metric name>,
"**lgK**" : <size and accuracy parameter>,
"tgtHllType" : <target HLL type>,
"round": <false | true>
}
`
of course I'm using this:
`
{
"type" : "hyperUnique",
"name" : <output_name>,
"fieldName" : <metric_name>,
"isInputHyperUnique" : false,
"round" : false
}
`
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