org.apache.flink.table.planner.plan.nodes.logical.FlinkLogicalIntermediateTableScan.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 org.apache.flink.table.planner.plan.nodes.FlinkConventions
import org.apache.flink.table.planner.plan.nodes.common.CommonIntermediateTableScan
import org.apache.flink.table.planner.plan.schema.IntermediateRelTable
import com.google.common.collect.ImmutableList
import org.apache.calcite.plan._
import org.apache.calcite.rel.convert.ConverterRule
import org.apache.calcite.rel.core.TableScan
import org.apache.calcite.rel.logical.LogicalTableScan
import org.apache.calcite.rel.{RelCollation, RelCollationTraitDef, RelNode}
import java.util
import java.util.function.Supplier
/**
* A flink TableScan that wraps [[IntermediateRelTable]].
*/
class FlinkLogicalIntermediateTableScan(
cluster: RelOptCluster,
traitSet: RelTraitSet,
table: RelOptTable)
extends CommonIntermediateTableScan(cluster, traitSet, table)
with FlinkLogicalRel {
override def copy(traitSet: RelTraitSet, inputs: util.List[RelNode]): RelNode = {
new FlinkLogicalIntermediateTableScan(cluster, traitSet, getTable)
}
}
class FlinkLogicalIntermediateTableScanConverter
extends ConverterRule(
classOf[LogicalTableScan],
Convention.NONE,
FlinkConventions.LOGICAL,
"FlinkLogicalIntermediateTableScanConverter") {
override def matches(call: RelOptRuleCall): Boolean = {
val scan: TableScan = call.rel(0)
val intermediateTable = scan.getTable.unwrap(classOf[IntermediateRelTable])
intermediateTable != null
}
def convert(rel: RelNode): RelNode = {
val scan = rel.asInstanceOf[TableScan]
FlinkLogicalIntermediateTableScan.create(rel.getCluster, scan.getTable)
}
}
object FlinkLogicalIntermediateTableScan {
val CONVERTER = new FlinkLogicalIntermediateTableScanConverter
def create(
cluster: RelOptCluster,
relOptTable: RelOptTable): FlinkLogicalIntermediateTableScan = {
val table: IntermediateRelTable = relOptTable.unwrap(classOf[IntermediateRelTable])
require(table != null)
val traitSet = cluster.traitSetOf(FlinkConventions.LOGICAL)
.replaceIfs(RelCollationTraitDef.INSTANCE, new Supplier[util.List[RelCollation]]() {
def get: util.List[RelCollation] = {
if (table != null) {
table.getStatistic.getCollations
} else {
ImmutableList.of[RelCollation]
}
}
}).simplify()
new FlinkLogicalIntermediateTableScan(cluster, traitSet, relOptTable)
}
}