org.apache.flink.table.planner.plan.rules.physical.batch.BatchPhysicalUnionRule.scala Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of flink-table-planner-blink_2.11 Show documentation
Show all versions of flink-table-planner-blink_2.11 Show documentation
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.batch
import org.apache.flink.table.planner.plan.nodes.FlinkConventions
import org.apache.flink.table.planner.plan.nodes.logical.FlinkLogicalUnion
import org.apache.flink.table.planner.plan.nodes.physical.batch.BatchPhysicalUnion
import org.apache.calcite.plan.{RelOptRule, RelOptRuleCall}
import org.apache.calcite.rel.RelNode
import org.apache.calcite.rel.convert.ConverterRule
import scala.collection.JavaConversions._
/**
* Rule that converts [[FlinkLogicalUnion]] to [[BatchPhysicalUnion]].
*/
class BatchPhysicalUnionRule
extends ConverterRule(
classOf[FlinkLogicalUnion],
FlinkConventions.LOGICAL,
FlinkConventions.BATCH_PHYSICAL,
"BatchPhysicalUnionRule") {
override def matches(call: RelOptRuleCall): Boolean = {
call.rel(0).asInstanceOf[FlinkLogicalUnion].all
}
def convert(rel: RelNode): RelNode = {
val union = rel.asInstanceOf[FlinkLogicalUnion]
val traitSet = rel.getTraitSet.replace(FlinkConventions.BATCH_PHYSICAL)
val newInputs = union.getInputs.map(RelOptRule.convert(_, FlinkConventions.BATCH_PHYSICAL))
new BatchPhysicalUnion(
rel.getCluster,
traitSet,
newInputs,
union.all,
rel.getRowType)
}
}
object BatchPhysicalUnionRule {
val INSTANCE: RelOptRule = new BatchPhysicalUnionRule
}