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/*
* 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.physical.stream
import org.apache.flink.table.planner.expressions.PlannerNamedWindowProperty
import org.apache.flink.table.planner.plan.logical._
import org.apache.flink.table.planner.plan.utils.AggregateUtil._
import org.apache.flink.table.planner.plan.utils._
import org.apache.calcite.plan.{RelOptCluster, RelTraitSet}
import org.apache.calcite.rel.`type`.RelDataType
import org.apache.calcite.rel.core.AggregateCall
import org.apache.calcite.rel.{RelNode, RelWriter, SingleRel}
/**
* Base streaming group window aggregate physical node for either aggregate or table aggregate.
*/
abstract class StreamPhysicalGroupWindowAggregateBase(
cluster: RelOptCluster,
traitSet: RelTraitSet,
inputRel: RelNode,
outputRowType: RelDataType,
val grouping: Array[Int],
val aggCalls: Seq[AggregateCall],
val window: LogicalWindow,
val namedWindowProperties: Seq[PlannerNamedWindowProperty],
val emitStrategy: WindowEmitStrategy)
extends SingleRel(cluster, traitSet, inputRel)
with StreamPhysicalRel {
override def requireWatermark: Boolean = window match {
case TumblingGroupWindow(_, timeField, size)
if isRowtimeAttribute(timeField) && hasTimeIntervalType(size) => true
case SlidingGroupWindow(_, timeField, size, _)
if isRowtimeAttribute(timeField) && hasTimeIntervalType(size) => true
case SessionGroupWindow(_, timeField, _)
if isRowtimeAttribute(timeField) => true
case _ => false
}
override def deriveRowType(): RelDataType = outputRowType
override def explainTerms(pw: RelWriter): RelWriter = {
val inputRowType = getInput.getRowType
super.explainTerms(pw)
.itemIf("groupBy", RelExplainUtil.fieldToString(grouping, inputRowType), grouping.nonEmpty)
.item("window", window)
.itemIf("properties", namedWindowProperties.map(_.getName).mkString(", "),
namedWindowProperties.nonEmpty)
.item("select", RelExplainUtil.legacyStreamWindowAggregationToString(
inputRowType,
grouping,
outputRowType,
aggCalls,
namedWindowProperties))
.itemIf("emit", emitStrategy, !emitStrategy.toString.isEmpty)
}
}