org.apache.flink.table.plan.util.SubplanReuseUtil.scala Maven / Gradle / Ivy

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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.plan.util

import org.apache.flink.table.api.{TableConfig, TableConfigOptions}

import org.apache.calcite.rel.RelNode

object SubplanReuseUtil {

  def reuseSubplan(rels: Seq[RelNode], tableConfig: TableConfig): Seq[RelNode] = {
    if (!tableConfig.getConf.getBoolean(TableConfigOptions.SQL_OPTIMIZER_REUSE_SUB_PLAN_ENABLED)) {
      return rels
    }
    val disableTableSourceReuse = !tableConfig.getConf.getBoolean(
      TableConfigOptions.SQL_OPTIMIZER_REUSE_TABLE_SOURCE_ENABLED)
    val context = new SubplanReuseContext(disableTableSourceReuse, rels: _*)
    val reuseShuttle = new SubplanReuseShuttle(context)
    rels.map(_.accept(reuseShuttle))
  }

}