yikf opened a new issue, #8721: URL: https://github.com/apache/incubator-gluten/issues/8721
### Backend VL (Velox) ### Bug description Native writer should keep the same compression with vanilla if `hive.exec.compress.output` is true. Let's take a look at the following example. Vanilla Spark will output in the zstd format, while Gluten will output in the [default snappy](https://github.com/apache/incubator-gluten/blob/main/cpp/velox/operators/writer/VeloxParquetDataSource.cc#L64) format. ``` Seq(false, true).foreach { enableNativeWrite => withSQLConf("spark.gluten.sql.native.writer.enabled" -> enableNativeWrite.toString) { withTable("t") { withSQLConf( "spark.sql.hive.convertMetastoreParquet" -> "false", "spark.sql.parquet.compression.codec" -> "gzip") { spark.sql("SET hive.exec.compress.output=true") spark.sql("SET parquet.compression=gzip") spark.sql( "SET mapred.output.compression.codec=org.apache.hadoop.io.compress.SnappyCodec") checkNativeWrite( "CREATE TABLE t STORED AS PARQUET TBLPROPERTIES ('parquet.compression'='zstd') " + "AS SELECT 1 as c", checkNative = enableNativeWrite) val tableDir = new Path(s"${conf.getConf(StaticSQLConf.WAREHOUSE_PATH)}/t") val configuration = spark.sessionState.newHadoopConf() val files = tableDir .getFileSystem(configuration) .listStatus(tableDir) .filterNot(_.getPath.getName.startsWith("\\.")) assert(files.nonEmpty) val in = HadoopInputFile.fromStatus(files.head, spark.sessionState.newHadoopConf()) Utils.tryWithResource(ParquetFileReader.open(in)) { reader => val compression = reader.getFooter.getBlocks.get(0).getColumns.get(0).getCodec.toString // native writer and vanilla spark hive writer should be consistent logWarning(s"Enable native writer ?$enableNativeWrite, compression: $compression") } } } } } ``` log ``` 25/02/13 16:23:01 WARN VeloxParquetWriteForHiveSuite: Enable native writer ?false, compression: ZSTD 25/02/13 16:23:02 WARN VeloxParquetWriteForHiveSuite: Enable native writer ?true, compression: SNAPPY ``` ### Spark version Spark-3.2.x ### Spark configurations _No response_ ### System information _No response_ ### Relevant logs ```bash ``` -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
