kunal642 commented on a change in pull request #3657: [CARBONDATA-3736] Improve show segment URL: https://github.com/apache/carbondata/pull/3657#discussion_r396246956
########## File path: integration/spark/src/main/scala/org/apache/spark/sql/execution/command/management/CarbonShowSegmentsByQueryCommand.scala ########## @@ -0,0 +1,135 @@ +/* + * 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.execution.command.management + +import org.apache.spark.sql.{CarbonEnv, DataFrame, Row, SparkSession} +import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeReference} +import org.apache.spark.sql.execution.command.{Checker, DataCommand} + +import org.apache.carbondata.api.CarbonStore +import org.apache.carbondata.common.exceptions.sql.MalformedCarbonCommandException +import org.apache.carbondata.core.metadata.schema.table.CarbonTable +import org.apache.carbondata.core.statusmanager.LoadMetadataDetails + +case class SegmentRow( + id: String, status: String, loadStartTime: String, spentTimeMs: Long, partitions: Seq[String], + dataSize: Long, indexSize: Long, mergedToId: String, format: String, path: String, + loadEndTime: String, segmentFileName: String) + +case class CarbonShowSegmentsByQueryCommand( + databaseNameOp: Option[String], + tableName: String, + query: String, + showHistory: Boolean = false) + extends DataCommand { + + private lazy val df = createDataFrame + + override def output: Seq[Attribute] = { + df.queryExecution.analyzed.output.map { attr => + AttributeReference(attr.name, attr.dataType, nullable = false)() + } + } + + override def processData(sparkSession: SparkSession): Seq[Row] = { + Checker.validateTableExists(databaseNameOp, tableName, sparkSession) + val carbonTable = CarbonEnv.getCarbonTable(databaseNameOp, tableName)(sparkSession) + setAuditTable(carbonTable) + if (!carbonTable.getTableInfo.isTransactionalTable) { + throw new MalformedCarbonCommandException("Unsupported operation on non transactional table") + } + try { + df.collect() + } catch { + case ex: Throwable => + throw new MalformedCarbonCommandException("failed to run query: " + ex.getMessage) + } finally { + sparkSession.catalog.dropTempView(makeTempViewName(carbonTable)) + } + } + + override protected def opName: String = "SHOW SEGMENTS" + + private def createDataFrame: DataFrame = { + val sparkSession = SparkSession.getActiveSession.get + val carbonTable = CarbonEnv.getCarbonTable(databaseNameOp, tableName)(sparkSession) + val tablePath = carbonTable.getTablePath + val segments = CarbonStore.readSegments(tablePath, showHistory) + val tempViewName = makeTempViewName(carbonTable) + registerSegmentRowView(sparkSession, tempViewName, carbonTable, segments) + try { + sparkSession.sql(query) + } catch { + case t: Throwable => + sparkSession.catalog.dropTempView(tempViewName) + throw t + } + } + + /** + * Generate temp view name for the query to execute + */ + private def makeTempViewName(carbonTable: CarbonTable): String = { + s"${carbonTable.getTableName}_segments" + } + + private def registerSegmentRowView( + sparkSession: SparkSession, + tempViewName: String, + carbonTable: CarbonTable, + segments: Array[LoadMetadataDetails]): Unit = { + + // populate a dataframe containing all segment information + val tablePath = carbonTable.getTablePath + val segmentRows = segments.toSeq.map { segment => + val mergedToId = CarbonStore.getMergeTo(segment) + val path = CarbonStore.getSegmentPath(segment) + val startTime = CarbonStore.getLoadStartTime(segment) + val endTime = CarbonStore.getLoadEndTime(segment) + val spentTime = CarbonStore.getSpentTimeAsMillis(segment) + val (dataSize, indexSize) = CarbonStore.getDataAndIndexSize(tablePath, segment) + val partitions = CarbonStore.getPartitions(tablePath, segment) + SegmentRow( + segment.getLoadName, + segment.getSegmentStatus.toString, + startTime, + spentTime, + partitions, + dataSize, + indexSize, + mergedToId, + segment.getFileFormat.toString, + path, + endTime, + if (segment.getSegmentFile == null) "NA" else segment.getSegmentFile) + } + + // create a temp view using the populated dataframe and execute the query on it + val df = sparkSession.createDataFrame(segmentRows) + checkIfTableExist(sparkSession, tempViewName) Review comment: please move this check to Line#74 ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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