org.apache.flink.table.planner.plan.schema.GenericRelDataType.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.

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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.planner.plan.schema

import org.apache.calcite.rel.`type`.RelDataTypeSystem
import org.apache.calcite.sql.`type`.{ArraySqlType, BasicSqlType, MapSqlType, SqlTypeName}
import java.lang

import org.apache.flink.table.types.logical.TypeInformationRawType

/**
  * Generic type for encapsulating Flink's [[TypeInformationRawType]].
  *
  * @param genericType LogicalType to encapsulate
  * @param nullable flag if type can be nullable
  * @param typeSystem Flink's type system
  */
class GenericRelDataType(
    val genericType: TypeInformationRawType[_],
    val nullable: Boolean,
    typeSystem: RelDataTypeSystem)
  extends BasicSqlType(
    typeSystem,
    SqlTypeName.ANY) {

  computeDigest()

  override def toString = s"RAW($genericType)"

  def canEqual(other: Any): Boolean = other.isInstanceOf[GenericRelDataType]

  override def equals(other: Any): Boolean = other match {
    case that: GenericRelDataType =>
      super.equals(that) &&
        (that canEqual this) &&
        genericType == that.genericType &&
        nullable == that.nullable
    case _ => false
  }

  override def hashCode(): Int = {
    genericType.hashCode()
  }

  override def isNullable: Boolean = nullable

  /**
    * [[ArraySqlType]], [[MapSqlType]]... use generateTypeString to equals and hashcode.
    */
  override def generateTypeString(sb: lang.StringBuilder, withDetail: Boolean): Unit = {
    sb.append(s"RAW('${genericType.getTypeInformation}')")
  }
}