org.apache.flink.table.planner.plan.rules.physical.stream.StreamPhysicalGroupAggregateRule.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.api.TableException
import org.apache.flink.table.planner.plan.`trait`.FlinkRelDistribution
import org.apache.flink.table.planner.plan.metadata.FlinkRelMetadataQuery
import org.apache.flink.table.planner.plan.nodes.FlinkConventions
import org.apache.flink.table.planner.plan.nodes.logical.FlinkLogicalAggregate
import org.apache.flink.table.planner.plan.nodes.physical.stream.StreamPhysicalGroupAggregate
import org.apache.flink.table.planner.plan.utils.PythonUtil.isPythonAggregate
import org.apache.flink.table.planner.plan.utils.WindowUtil
import org.apache.calcite.plan.{RelOptRule, RelOptRuleCall}
import org.apache.calcite.rel.RelNode
import org.apache.calcite.rel.convert.ConverterRule
import org.apache.calcite.rel.core.Aggregate.Group
import scala.collection.JavaConversions._
/**
* Rule to convert a [[FlinkLogicalAggregate]] into a [[StreamPhysicalGroupAggregate]].
*/
class StreamPhysicalGroupAggregateRule
extends ConverterRule(
classOf[FlinkLogicalAggregate],
FlinkConventions.LOGICAL,
FlinkConventions.STREAM_PHYSICAL,
"StreamPhysicalGroupAggregateRule") {
override def matches(call: RelOptRuleCall): Boolean = {
val agg: FlinkLogicalAggregate = call.rel(0)
// check if we have grouping sets
if (agg.getGroupType != Group.SIMPLE || agg.indicator) {
throw new TableException("GROUPING SETS are currently not supported.")
}
if (agg.getAggCallList.exists(isPythonAggregate(_))) {
return false
}
// check not window aggregate
val fmq = FlinkRelMetadataQuery.reuseOrCreate(call.getMetadataQuery)
val windowProperties = fmq.getRelWindowProperties(agg.getInput)
val grouping = agg.getGroupSet
!WindowUtil.groupingContainsWindowStartEnd(grouping, windowProperties)
}
override def convert(rel: RelNode): RelNode = {
val agg: FlinkLogicalAggregate = rel.asInstanceOf[FlinkLogicalAggregate]
val requiredDistribution = if (agg.getGroupCount != 0) {
FlinkRelDistribution.hash(agg.getGroupSet.asList)
} else {
FlinkRelDistribution.SINGLETON
}
val requiredTraitSet = rel.getCluster.getPlanner.emptyTraitSet()
.replace(requiredDistribution)
.replace(FlinkConventions.STREAM_PHYSICAL)
val providedTraitSet = rel.getTraitSet.replace(FlinkConventions.STREAM_PHYSICAL)
val newInput: RelNode = RelOptRule.convert(agg.getInput, requiredTraitSet)
new StreamPhysicalGroupAggregate(
rel.getCluster,
providedTraitSet,
newInput,
rel.getRowType,
agg.getGroupSet.toArray,
agg.getAggCallList,
agg.partialFinalType)
}
}
object StreamPhysicalGroupAggregateRule {
val INSTANCE: RelOptRule = new StreamPhysicalGroupAggregateRule
}