mingmwang commented on issue #4372:
URL:
https://github.com/apache/arrow-datafusion/issues/4372#issuecomment-1331871103
@isidentical
Presto/Trino, looks like it is default to 0.9
````
booleanProperty(
DEFAULT_FILTER_FACTOR_ENABLED,
"use a default filter factor for unknown filters in a filter node",
optimizerConfig.isDefaultFilterFactorEnabled(),
false),
````
https://github.com/trinodb/trino/blob/0f71007ecb480384a9c443ba883f4bc4d896df83/core/trino-main/src/main/java/io/trino/cost/FilterStatsCalculator.java#L90-L93
SparkSQL, looks like it is default to 1.0
````
def calculateFilterSelectivity(condition: Expression, update: Boolean =
true): Option[Double] = {
condition match {
case And(cond1, cond2) =>
val percent1 = calculateFilterSelectivity(cond1,
update).getOrElse(1.0)
val percent2 = calculateFilterSelectivity(cond2,
update).getOrElse(1.0)
Some(percent1 * percent2)
case Or(cond1, cond2) =>
val percent1 = calculateFilterSelectivity(cond1, update =
false).getOrElse(1.0)
val percent2 = calculateFilterSelectivity(cond2, update =
false).getOrElse(1.0)
Some(percent1 + percent2 - (percent1 * percent2))
// Not-operator pushdown
case Not(And(cond1, cond2)) =>
calculateFilterSelectivity(Or(Not(cond1), Not(cond2)), update =
false)
// Not-operator pushdown
case Not(Or(cond1, cond2)) =>
calculateFilterSelectivity(And(Not(cond1), Not(cond2)), update =
false)
// Collapse two consecutive Not operators which could be generated
after Not-operator pushdown
case Not(Not(cond)) =>
calculateFilterSelectivity(cond, update = false)
// The foldable Not has been processed in the ConstantFolding rule
// This is a top-down traversal. The Not could be pushed down by the
above two cases.
case Not(l @ Literal(null, _)) =>
calculateSingleCondition(l, update = false).map(boundProbability(_))
case Not(cond) =>
calculateFilterSelectivity(cond, update = false) match {
case Some(percent) => Some(1.0 - percent)
case None => None
}
case _ =>
calculateSingleCondition(condition, update).map(boundProbability(_))
}
}
````
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