rdblue commented on code in PR #9423: URL: https://github.com/apache/iceberg/pull/9423#discussion_r1456586630
########## spark/v3.5/spark-extensions/src/main/scala/org/apache/spark/sql/execution/datasources/v2/CreateV2ViewExec.scala: ########## @@ -0,0 +1,144 @@ +/* + * 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.datasources.v2 + +import org.apache.iceberg.spark.Spark3Util +import org.apache.spark.sql.catalyst.InternalRow +import org.apache.spark.sql.catalyst.analysis.ViewAlreadyExistsException +import org.apache.spark.sql.catalyst.expressions.Alias +import org.apache.spark.sql.catalyst.expressions.Attribute +import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan +import org.apache.spark.sql.catalyst.plans.logical.Project +import org.apache.spark.sql.connector.catalog.Identifier +import org.apache.spark.sql.connector.catalog.ViewCatalog +import org.apache.spark.sql.errors.QueryCompilationErrors +import org.apache.spark.sql.execution.CommandExecutionMode +import org.apache.spark.sql.internal.SQLConf +import org.apache.spark.sql.types.MetadataBuilder +import org.apache.spark.sql.util.SchemaUtils +import scala.collection.JavaConverters._ + + +case class CreateV2ViewExec( + catalog: ViewCatalog, + ident: Identifier, + originalText: String, + query: LogicalPlan, + userSpecifiedColumns: Seq[(String, Option[String])], + comment: Option[String], + properties: Map[String, String], + allowExisting: Boolean, + replace: Boolean) extends LeafV2CommandExec { + + override lazy val output: Seq[Attribute] = Nil + + override protected def run(): Seq[InternalRow] = { + val analyzedPlan = session.sessionState.executePlan(query, CommandExecutionMode.SKIP).analyzed + val identifier = Spark3Util.toV1TableIdentifier(ident) + + if (userSpecifiedColumns.nonEmpty) { + if (userSpecifiedColumns.length > analyzedPlan.output.length) { + throw QueryCompilationErrors.cannotCreateViewNotEnoughColumnsError( + identifier, userSpecifiedColumns.map(_._1), analyzedPlan) + } else if (userSpecifiedColumns.length < analyzedPlan.output.length) { + throw QueryCompilationErrors.cannotCreateViewTooManyColumnsError( + identifier, userSpecifiedColumns.map(_._1), analyzedPlan) + } + } + + val queryColumnNames = analyzedPlan.schema.fieldNames + SchemaUtils.checkColumnNameDuplication(queryColumnNames, SQLConf.get.resolver) + + val viewSchema = aliasPlan(analyzedPlan, userSpecifiedColumns).schema + val columnAliases = userSpecifiedColumns.map(_._1).toArray + val columnComments = userSpecifiedColumns.map(_._2.orNull).toArray + + val currentCatalogName = session.sessionState.catalogManager.currentCatalog.name + val currentCatalog = if (!catalog.name().equals(currentCatalogName)) currentCatalogName else null + val currentNamespace = session.sessionState.catalogManager.currentNamespace + + val engineVersion = "Spark " + org.apache.spark.SPARK_VERSION + val newProperties = properties ++ + comment.map(ViewCatalog.PROP_COMMENT -> _) + + (ViewCatalog.PROP_CREATE_ENGINE_VERSION -> engineVersion, + ViewCatalog.PROP_ENGINE_VERSION -> engineVersion) + + if (replace) { + // CREATE OR REPLACE VIEW + if (catalog.viewExists(ident)) { + catalog.dropView(ident) + } + // FIXME: replaceView API doesn't exist in Spark 3.5 + catalog.createView( + ident, + originalText, + currentCatalog, + currentNamespace, + viewSchema, + queryColumnNames, + columnAliases, + columnComments, + newProperties.asJava) + } else { + try { + // CREATE VIEW [IF NOT EXISTS] + catalog.createView( + ident, + originalText, + currentCatalog, + currentNamespace, + viewSchema, + queryColumnNames, + columnAliases, + columnComments, + newProperties.asJava) + } catch { + case _: ViewAlreadyExistsException if allowExisting => // Ignore + } + } + + Nil + } + + override def simpleString(maxFields: Int): String = { + s"CreateV2ViewExec: ${ident}" + } + + /** + * If `userSpecifiedColumns` is defined, alias the analyzed plan to the user specified columns, + * else return the analyzed plan directly. + */ + private def aliasPlan( + analyzedPlan: LogicalPlan, + userSpecifiedColumns: Seq[(String, Option[String])]): LogicalPlan = { + if (userSpecifiedColumns.isEmpty) { + analyzedPlan + } else { + val projectList = analyzedPlan.output.zip(userSpecifiedColumns).map { + case (attr, (colName, None)) => Alias(attr, colName)() + case (attr, (colName, Some(colComment))) => + val meta = new MetadataBuilder().putString("comment", colComment).build() + Alias(attr, colName)(explicitMetadata = Some(meta)) + } + val projectedPlan = Project(projectList, analyzedPlan) + session.sessionState.executePlan(projectedPlan, CommandExecutionMode.SKIP).analyzed Review Comment: I'm not a big fan of executing the analyzer again here if we could avoid it. Not a big deal though. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For additional commands, e-mail: issues-h...@iceberg.apache.org
