Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/15996#discussion_r93298271 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala --- @@ -364,48 +365,149 @@ final class DataFrameWriter[T] private[sql](ds: Dataset[T]) { throw new AnalysisException("Cannot create hive serde table with saveAsTable API") } - val tableExists = df.sparkSession.sessionState.catalog.tableExists(tableIdent) - - (tableExists, mode) match { - case (true, SaveMode.Ignore) => - // Do nothing - - case (true, SaveMode.ErrorIfExists) => - throw new AnalysisException(s"Table $tableIdent already exists.") - - case _ => - val existingTable = if (tableExists) { - Some(df.sparkSession.sessionState.catalog.getTableMetadata(tableIdent)) - } else { - None - } - val storage = if (tableExists) { - existingTable.get.storage - } else { - DataSource.buildStorageFormatFromOptions(extraOptions.toMap) - } - val tableType = if (tableExists) { - existingTable.get.tableType - } else if (storage.locationUri.isDefined) { - CatalogTableType.EXTERNAL - } else { - CatalogTableType.MANAGED + val catalog = df.sparkSession.sessionState.catalog + val db = tableIdent.database.getOrElse(catalog.getCurrentDatabase) + val tableIdentWithDB = tableIdent.copy(database = Some(db)) + val tableName = tableIdentWithDB.unquotedString + + catalog.getTableMetadataOption(tableIdentWithDB) match { + // If the table already exists... + case Some(existingTable) => + mode match { + case SaveMode.Ignore => // Do nothing + + case SaveMode.ErrorIfExists => + throw new AnalysisException(s"Table $tableName already exists. You can set SaveMode " + + "to SaveMode.Append to insert data into the table or set SaveMode to " + + "SaveMode.Overwrite to overwrite the existing data.") + + case SaveMode.Append => + if (existingTable.tableType == CatalogTableType.VIEW) { + throw new AnalysisException("Saving data into a view is not allowed.") + } + + if (existingTable.provider.get == DDLUtils.HIVE_PROVIDER) { + throw new AnalysisException(s"Saving data in the Hive serde table $tableName is " + + s"not supported yet. Please use the insertInto() API as an alternative.") --- End diff -- Nit: this string interpolation is not needed.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org