org.apache.flink.table.planner.plan.nodes.logical.FlinkLogicalTableAggregate.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.nodes.logical
import java.util
import java.util.{List => JList}
import org.apache.calcite.plan._
import org.apache.calcite.rel.RelNode
import org.apache.calcite.rel.convert.ConverterRule
import org.apache.calcite.rel.core.AggregateCall
import org.apache.calcite.util.ImmutableBitSet
import org.apache.flink.table.planner.plan.nodes.FlinkConventions
import org.apache.flink.table.planner.plan.nodes.calcite.{LogicalTableAggregate, TableAggregate}
/**
* Sub-class of [[TableAggregate]] that is a relational expression which performs aggregations but
* outputs 0 or more records for a group.
*/
class FlinkLogicalTableAggregate(
cluster: RelOptCluster,
traitSet: RelTraitSet,
input: RelNode,
groupSet: ImmutableBitSet,
groupSets: util.List[ImmutableBitSet],
aggCalls: util.List[AggregateCall])
extends TableAggregate(cluster, traitSet, input, groupSet, groupSets, aggCalls)
with FlinkLogicalRel {
override def copy(traitSet: RelTraitSet, inputs: JList[RelNode]): RelNode = {
new FlinkLogicalTableAggregate(
cluster,
traitSet,
inputs.get(0),
groupSet,
groupSets,
aggCalls
)
}
}
private class FlinkLogicalTableAggregateConverter
extends ConverterRule(
classOf[LogicalTableAggregate],
Convention.NONE,
FlinkConventions.LOGICAL,
"FlinkLogicalTableAggregateConverter") {
override def convert(rel: RelNode): RelNode = {
val agg = rel.asInstanceOf[LogicalTableAggregate]
val traitSet = rel.getTraitSet.replace(FlinkConventions.LOGICAL)
val newInput = RelOptRule.convert(agg.getInput, FlinkConventions.LOGICAL)
new FlinkLogicalTableAggregate(
rel.getCluster,
traitSet,
newInput,
agg.getGroupSet,
agg.getGroupSets,
agg.aggCalls)
}
}
object FlinkLogicalTableAggregate {
val CONVERTER: ConverterRule = new FlinkLogicalTableAggregateConverter()
}