spark HintErrorLogger 源码

2022-10-20
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spark HintErrorLogger 代码

文件路径：/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HintErrorLogger.scala

/*
 * 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.spark.sql.catalyst.analysis

import org.apache.spark.internal.Logging
import org.apache.spark.sql.catalyst.plans.logical.{HintErrorHandler, HintInfo}

/**
 * The hint error handler that logs warnings for each hint error.
 */
object HintErrorLogger extends HintErrorHandler with Logging {
  import org.apache.spark.sql.connector.catalog.CatalogV2Implicits._

  override def hintNotRecognized(name: String, parameters: Seq[Any]): Unit = {
    logWarning(s"Unrecognized hint: ${hintToPrettyString(name, parameters)}")
  }

  override def hintRelationsNotFound(
      name: String, parameters: Seq[Any], invalidRelations: Set[Seq[String]]): Unit = {
    invalidRelations.foreach { ident =>
      logWarning(s"Count not find relation '${ident.quoted}' specified in hint " +
        s"'${hintToPrettyString(name, parameters)}'.")
    }
  }

  override def joinNotFoundForJoinHint(hint: HintInfo): Unit = {
    logWarning(s"A join hint $hint is specified but it is not part of a join relation.")
  }

  override def joinHintNotSupported(hint: HintInfo, reason: String): Unit = {
    logWarning(s"Hint $hint is not supported in the query: $reason.")
  }

  override def hintOverridden(hint: HintInfo): Unit = {
    logWarning(s"Hint $hint is overridden by another hint and will not take effect.")
  }

  private def hintToPrettyString(name: String, parameters: Seq[Any]): String = {
    val prettyParameters = parameters.map {
      case a: UnresolvedAttribute => a.nameParts.mkString(".")
      case e: Any => e.toString
    }
    s"$name${prettyParameters.mkString("(", ", ", ")")}"
  }
}

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