spark SparkSQLDriver 源码

spark SparkSQLDriver 代码

文件路径：/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLDriver.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.hive.thriftserver

import java.util.{ArrayList => JArrayList, Arrays, List => JList}

import scala.collection.JavaConverters._

import org.apache.commons.lang3.exception.ExceptionUtils
import org.apache.hadoop.hive.metastore.api.{FieldSchema, Schema}
import org.apache.hadoop.hive.ql.Driver
import org.apache.hadoop.hive.ql.processors.CommandProcessorResponse

import org.apache.spark.SparkThrowable
import org.apache.spark.internal.Logging
import org.apache.spark.sql.SQLContext
import org.apache.spark.sql.execution.{QueryExecution, SQLExecution}
import org.apache.spark.sql.execution.HiveResult.hiveResultString
import org.apache.spark.sql.internal.{SQLConf, VariableSubstitution}


private[hive] class SparkSQLDriver(val context: SQLContext = SparkSQLEnv.sqlContext)
  extends Driver
  with Logging {

  private[hive] var tableSchema: Schema = _
  private[hive] var hiveResponse: Seq[String] = _

  override def init(): Unit = {
  }

  private def getResultSetSchema(query: QueryExecution): Schema = {
    val analyzed = query.analyzed
    logDebug(s"Result Schema: ${analyzed.output}")
    if (analyzed.output.isEmpty) {
      new Schema(Arrays.asList(new FieldSchema("Response code", "string", "")), null)
    } else {
      val fieldSchemas = analyzed.output.map { attr =>
        new FieldSchema(attr.name, attr.dataType.catalogString, "")
      }

      new Schema(fieldSchemas.asJava, null)
    }
  }

  override def run(command: String): CommandProcessorResponse = {
    try {
      val substitutorCommand = SQLConf.withExistingConf(context.conf) {
        new VariableSubstitution().substitute(command)
      }
      context.sparkContext.setJobDescription(substitutorCommand)
      val execution = context.sessionState.executePlan(context.sql(command).logicalPlan)
      hiveResponse = SQLExecution.withNewExecutionId(execution, Some("cli")) {
        hiveResultString(execution.executedPlan)
      }
      tableSchema = getResultSetSchema(execution)
      new CommandProcessorResponse(0)
    } catch {
        case st: SparkThrowable =>
          logDebug(s"Failed in [$command]", st)
          new CommandProcessorResponse(1, ExceptionUtils.getStackTrace(st), st.getSqlState, st)
        case cause: Throwable =>
          logError(s"Failed in [$command]", cause)
          new CommandProcessorResponse(1, ExceptionUtils.getStackTrace(cause), null, cause)
    }
  }

  override def close(): Int = {
    hiveResponse = null
    tableSchema = null
    0
  }

  override def getResults(res: JList[_]): Boolean = {
    if (hiveResponse == null) {
      false
    } else {
      res.asInstanceOf[JArrayList[String]].addAll(hiveResponse.asJava)
      hiveResponse = null
      true
    }
  }

  override def getSchema: Schema = tableSchema

  override def destroy(): Unit = {
    super.destroy()
    hiveResponse = null
    tableSchema = null
  }
}

相关信息

spark 源码目录

相关文章

spark FetchIterator 源码

spark HiveThriftServer2 源码

spark HiveThriftServerErrors 源码

spark ReflectionUtils 源码

spark RowSetUtils 源码

spark SparkExecuteStatementOperation 源码

spark SparkGetCatalogsOperation 源码

spark SparkGetColumnsOperation 源码

spark SparkGetFunctionsOperation 源码

spark SparkGetSchemasOperation 源码