org.apache.flink.table.plan.schema.RelTable.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.schema

import org.apache.calcite.plan.RelOptTable
import org.apache.calcite.plan.RelOptTable.ToRelContext
import org.apache.calcite.rel.RelNode
import org.apache.calcite.rel.`type`.{RelDataType, RelDataTypeFactory}
import org.apache.calcite.schema.Schema.TableType
import org.apache.calcite.schema.impl.AbstractTable
import org.apache.calcite.schema.TranslatableTable

/**
 * A [[org.apache.calcite.schema.Table]] implementation for registering
 * Table API Tables in the Calcite schema to be used by Flink SQL.
 * It implements [[TranslatableTable]] so that its logical scan
 * can be converted to a relational expression.
 */
class RelTable(relNode: RelNode) extends AbstractTable with TranslatableTable {

  override def getJdbcTableType: TableType = ???

  override def getRowType(typeFactory: RelDataTypeFactory): RelDataType = relNode.getRowType

  override def toRel(context: ToRelContext, relOptTable: RelOptTable): RelNode = {
    relNode
  }
}