org.apache.flink.table.planner.plan.rules.logical.CalcSnapshotTransposeRule.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.logical
import org.apache.flink.table.planner.plan.nodes.logical.{FlinkLogicalCalc, FlinkLogicalSnapshot}
import org.apache.calcite.plan.RelOptRule.{any, operand}
import org.apache.calcite.plan.{RelOptRule, RelOptRuleCall}
import org.apache.calcite.rex.RexOver
/**
* Transpose [[FlinkLogicalCalc]] past into [[FlinkLogicalSnapshot]].
*/
class CalcSnapshotTransposeRule extends RelOptRule(
operand(classOf[FlinkLogicalCalc],
operand(classOf[FlinkLogicalSnapshot], any())),
"CalcSnapshotTransposeRule") {
override def matches(call: RelOptRuleCall): Boolean = {
val calc = call.rel[FlinkLogicalCalc](0)
// Don't push a calc which contains windowed aggregates into a snapshot for now.
!RexOver.containsOver(calc.getProgram)
}
override def onMatch(call: RelOptRuleCall): Unit = {
val calc = call.rel[FlinkLogicalCalc](0)
val snapshot = call.rel[FlinkLogicalSnapshot](1)
val newClac = calc.copy(calc.getTraitSet, snapshot.getInputs)
val newSnapshot = snapshot.copy(snapshot.getTraitSet, newClac, snapshot.getPeriod)
call.transformTo(newSnapshot)
}
}
object CalcSnapshotTransposeRule {
val INSTANCE = new CalcSnapshotTransposeRule
}