org.apache.flink.table.planner.plan.rules.physical.stream.StreamExecRankRule.scala Maven / Gradle / Ivy
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This module bridges Table/SQL API and runtime. It contains
all resources that are required during pre-flight and runtime
phase. The content of this module is work-in-progress. It will
replace flink-table-planner once it is stable. See FLINK-11439
and FLIP-32 for more details.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.table.planner.plan.rules.physical.stream
import org.apache.flink.table.planner.plan.`trait`.FlinkRelDistribution
import org.apache.flink.table.planner.plan.nodes.FlinkConventions
import org.apache.flink.table.planner.plan.nodes.logical.FlinkLogicalRank
import org.apache.flink.table.planner.plan.nodes.physical.stream.{StreamExecDeduplicate, StreamExecRank}
import org.apache.calcite.plan.{RelOptRule, RelOptRuleCall}
import org.apache.calcite.rel.RelNode
import org.apache.calcite.rel.convert.ConverterRule
/**
* Rule that converts [[FlinkLogicalRank]] with fetch to [[StreamExecRank]].
* NOTES: the rank can not be converted to [[StreamExecDeduplicate]].
*/
class StreamExecRankRule
extends ConverterRule(
classOf[FlinkLogicalRank],
FlinkConventions.LOGICAL,
FlinkConventions.STREAM_PHYSICAL,
"StreamExecRankRule") {
override def matches(call: RelOptRuleCall): Boolean = {
val rank: FlinkLogicalRank = call.rel(0)
!StreamExecDeduplicateRule.canConvertToDeduplicate(rank)
}
override def convert(rel: RelNode): RelNode = {
val rank = rel.asInstanceOf[FlinkLogicalRank]
val input = rank.getInput
val requiredDistribution = if (!rank.partitionKey.isEmpty) {
FlinkRelDistribution.hash(rank.partitionKey.toList)
} else {
FlinkRelDistribution.SINGLETON
}
val requiredTraitSet = input.getTraitSet
.replace(FlinkConventions.STREAM_PHYSICAL)
.replace(requiredDistribution)
val providedTraitSet = rank.getTraitSet.replace(FlinkConventions.STREAM_PHYSICAL)
val newInput: RelNode = RelOptRule.convert(input, requiredTraitSet)
new StreamExecRank(
rank.getCluster,
providedTraitSet,
newInput,
rank.partitionKey,
rank.orderKey,
rank.rankType,
rank.rankRange,
rank.rankNumberType,
rank.outputRankNumber)
}
}
object StreamExecRankRule {
val INSTANCE: RelOptRule = new StreamExecRankRule
}