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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.spark.sql.hive.thriftserver
import scala.collection.JavaConversions._
import java.util.{ArrayList => JArrayList}
import org.apache.commons.lang.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.sql.Logging
import org.apache.spark.sql.hive.{HiveContext, HiveMetastoreTypes}
private[hive] class SparkSQLDriver(val context: HiveContext = SparkSQLEnv.hiveContext)
extends Driver with Logging {
private var tableSchema: Schema = _
private var hiveResponse: Seq[String] = _
override def init(): Unit = {
}
private def getResultSetSchema(query: context.QueryExecution): Schema = {
val analyzed = query.analyzed
logger.debug(s"Result Schema: ${analyzed.output}")
if (analyzed.output.size == 0) {
new Schema(new FieldSchema("Response code", "string", "") :: Nil, null)
} else {
val fieldSchemas = analyzed.output.map { attr =>
new FieldSchema(attr.name, HiveMetastoreTypes.toMetastoreType(attr.dataType), "")
}
new Schema(fieldSchemas, null)
}
}
override def run(command: String): CommandProcessorResponse = {
val execution = context.executePlan(context.hql(command).logicalPlan)
// TODO unify the error code
try {
hiveResponse = execution.stringResult()
tableSchema = getResultSetSchema(execution)
new CommandProcessorResponse(0)
} catch {
case cause: Throwable =>
logger.error(s"Failed in [$command]", cause)
new CommandProcessorResponse(-3, ExceptionUtils.getFullStackTrace(cause), null)
}
}
override def close(): Int = {
hiveResponse = null
tableSchema = null
0
}
override def getSchema: Schema = tableSchema
override def getResults(res: JArrayList[String]): Boolean = {
if (hiveResponse == null) {
false
} else {
res.addAll(hiveResponse)
hiveResponse = null
true
}
}
override def destroy() {
super.destroy()
hiveResponse = null
tableSchema = null
}
}
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