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Subject [GitHub] [carbondata] QiangCai commented on a change in pull request #3608: [CARBONDATA-3680][alpha-feature]Support Secondary Index feature on carbon table.
Date Thu, 13 Feb 2020 10:30:35 GMT
QiangCai commented on a change in pull request #3608: [CARBONDATA-3680][alpha-feature]Support
Secondary Index feature on carbon table.
URL: https://github.com/apache/carbondata/pull/3608#discussion_r378771821
 
 

 ##########
 File path: integration/spark2/src/main/scala/org/apache/spark/sql/secondaryindex/command/SICreationCommand.scala
 ##########
 @@ -0,0 +1,574 @@
+/*
+ * 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.secondaryindex.command
+
+import java.io.IOException
+import java.util
+import java.util.UUID
+
+import scala.collection.JavaConverters._
+import scala.language.implicitConversions
+
+import org.apache.log4j.Logger
+import org.apache.spark.sql._
+import org.apache.spark.sql.catalyst.TableIdentifier
+import org.apache.spark.sql.catalyst.parser.ParseException
+import org.apache.spark.sql.execution.command.DataCommand
+import org.apache.spark.sql.hive.{CarbonHiveMetadataUtil, CarbonRelation}
+import org.apache.spark.sql.secondaryindex.exception.IndexTableExistException
+import org.apache.spark.sql.secondaryindex.load.CarbonInternalLoaderUtil
+import org.apache.spark.sql.secondaryindex.util.{CarbonInternalScalaUtil, IndexTableUtil}
+
+import org.apache.carbondata.common.exceptions.sql.MalformedCarbonCommandException
+import org.apache.carbondata.common.logging.LogServiceFactory
+import org.apache.carbondata.core.constants.CarbonCommonConstants
+import org.apache.carbondata.core.datastore.impl.FileFactory
+import org.apache.carbondata.core.locks.{CarbonLockFactory, CarbonLockUtil, ICarbonLock,
LockUsage}
+import org.apache.carbondata.core.metadata.AbsoluteTableIdentifier
+import org.apache.carbondata.core.metadata.datatype.{DataType, DataTypes}
+import org.apache.carbondata.core.metadata.encoder.Encoding
+import org.apache.carbondata.core.metadata.schema.{SchemaEvolution, SchemaEvolutionEntry,
SchemaReader}
+import org.apache.carbondata.core.metadata.schema.indextable.{IndexMetadata, IndexTableInfo}
+import org.apache.carbondata.core.metadata.schema.table.{CarbonTable, TableInfo, TableSchema}
+import org.apache.carbondata.core.metadata.schema.table.column.ColumnSchema
+import org.apache.carbondata.core.service.impl.ColumnUniqueIdGenerator
+import org.apache.carbondata.core.util.{CarbonProperties, CarbonUtil}
+import org.apache.carbondata.core.util.path.CarbonTablePath
+import org.apache.carbondata.events.{CreateTablePostExecutionEvent, CreateTablePreExecutionEvent,
OperationContext, OperationListenerBus}
+
+class ErrorMessage(message: String) extends Exception(message) {
+}
+
+ /**
+  * Command for index table creation
+  * @param indexModel      SecondaryIndex model holding the index infomation
+  * @param tableProperties SI table properties
+  * @param isCreateSIndex  if false then will not create index table schema in the carbonstore
+   *                        and will avoid dataload for SI creation.
+  */
+ private[sql] case class CreateIndexTable(indexModel: SecondaryIndex,
+     tableProperties: scala.collection.mutable.Map[String, String],
+     var isCreateSIndex: Boolean = true)
+   extends DataCommand {
+
+   val LOGGER: Logger = LogServiceFactory.getLogService(this.getClass.getCanonicalName)
+
+   override def processData(sparkSession: SparkSession): Seq[Row] = {
+    val databaseName = CarbonEnv.getDatabaseName(indexModel.databaseName)(sparkSession)
+    indexModel.databaseName = Some(databaseName)
+    val tableName = indexModel.tableName
+    val storePath = CarbonProperties.getStorePath
+    val dbLocation = CarbonEnv.getDatabaseLocation(databaseName, sparkSession)
+    val indexTableName = indexModel.indexTableName
+
+    val tablePath = dbLocation + CarbonCommonConstants.FILE_SEPARATOR + indexTableName
+     setAuditTable(databaseName, indexTableName)
+     setAuditInfo(Map("Column names" -> indexModel.columnNames.toString(),
+       "Parent TableName" -> indexModel.tableName,
+       "SI Table Properties" -> tableProperties.toString()))
+    LOGGER.info(
+      s"Creating Index with Database name [$databaseName] and Index name [$indexTableName]")
+    val catalog = CarbonEnv.getInstance(sparkSession).carbonMetaStore
+    val identifier = TableIdentifier(tableName, indexModel.databaseName)
+    var carbonTable: CarbonTable = null
+    var locks: List[ICarbonLock] = List()
+    var oldIndexInfo = ""
+
+    try {
+      carbonTable = CarbonEnv.getCarbonTable(indexModel.databaseName, tableName)(sparkSession)
+      if (carbonTable == null) {
+        throw new ErrorMessage(s"Parent Table $databaseName.$tableName is not found")
+      }
+
+      if (carbonTable != null &&
+          (carbonTable.isFileLevelFormat || !carbonTable.getTableInfo.isTransactionalTable))
{
+        throw new MalformedCarbonCommandException(
+          "Unsupported operation on non transactional table")
+      }
+
+      if (carbonTable.isStreamingSink) {
+        throw new ErrorMessage(
+          s"Parent Table  ${ carbonTable.getDatabaseName }." +
+          s"${ carbonTable.getTableName }" +
+          s" is Streaming Table and Secondary index on Streaming table is not supported ")
+      }
+
+      if (carbonTable.isHivePartitionTable) {
+        throw new ErrorMessage(
+          s"Parent Table  ${ carbonTable.getDatabaseName }." +
+          s"${ carbonTable.getTableName }" +
+          s" is Partition Table and Secondary index on Partition table is not supported ")
 
 Review comment:
   is it easy to support it in the future?

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