org.apache.flink.table.plan.metadata.FlinkRelMdCumulativeCost.scala Maven / Gradle / Ivy
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package org.apache.flink.table.plan.metadata
import org.apache.calcite.adapter.enumerable.EnumerableInterpreter
import org.apache.calcite.plan.RelOptCost
import org.apache.calcite.rel.RelNode
import org.apache.calcite.rel.metadata._
import org.apache.calcite.util.BuiltInMethod
import scala.collection.JavaConversions._
class FlinkRelMdCumulativeCost private extends MetadataHandler[BuiltInMetadata.CumulativeCost] {
def getDef: MetadataDef[BuiltInMetadata.CumulativeCost] = BuiltInMetadata.CumulativeCost.DEF
def getCumulativeCost(rel: RelNode, mq: RelMetadataQuery): RelOptCost = {
rel.getInputs.foldLeft(mq.getNonCumulativeCost(rel))((acc, r) => {
acc.plus(mq.getCumulativeCost(r))})
}
def getCumulativeCost(
rel: EnumerableInterpreter,
mq: RelMetadataQuery): RelOptCost = mq.getNonCumulativeCost(rel)
}
object FlinkRelMdCumulativeCost {
private val INSTANCE = new FlinkRelMdCumulativeCost
val SOURCE: RelMetadataProvider = ReflectiveRelMetadataProvider.reflectiveSource(
BuiltInMethod.CUMULATIVE_COST.method, INSTANCE)
}