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Yin Huai commented on SPARK-6570: --------------------------------- [~jonchase] Can you test our Spark 1.4 branch? I think it has been fixed in 1.4. > Spark SQL arrays: "explode()" fails and cannot save array type to Parquet > ------------------------------------------------------------------------- > > Key: SPARK-6570 > URL: https://issues.apache.org/jira/browse/SPARK-6570 > Project: Spark > Issue Type: Bug > Components: SQL > Affects Versions: 1.3.0 > Reporter: Jon Chase > Priority: Critical > > {code} > @Rule > public TemporaryFolder tmp = new TemporaryFolder(); > @Test > public void testPercentileWithExplode() throws Exception { > StructType schema = DataTypes.createStructType(Lists.newArrayList( > DataTypes.createStructField("col1", DataTypes.StringType, > false), > DataTypes.createStructField("col2s", > DataTypes.createArrayType(DataTypes.IntegerType, true), true) > )); > JavaRDD<Row> rowRDD = sc.parallelize(Lists.newArrayList( > RowFactory.create("test", new int[]{1, 2, 3}) > )); > DataFrame df = sql.createDataFrame(rowRDD, schema); > df.registerTempTable("df"); > df.printSchema(); > List<int[]> ints = sql.sql("select col2s from df").javaRDD() > .map(row -> (int[]) row.get(0)).collect(); > assertEquals(1, ints.size()); > assertArrayEquals(new int[]{1, 2, 3}, ints.get(0)); > // fails: lateral view explode does not work: > java.lang.ClassCastException: [I cannot be cast to scala.collection.Seq > List<Integer> explodedInts = sql.sql("select col2 from df lateral > view explode(col2s) splode as col2").javaRDD() > .map(row -> row.getInt(0)).collect(); > assertEquals(3, explodedInts.size()); > assertEquals(Lists.newArrayList(1, 2, 3), explodedInts); > // fails: java.lang.ClassCastException: [I cannot be cast to > scala.collection.Seq > df.saveAsParquetFile(tmp.getRoot().getAbsolutePath() + "/parquet"); > DataFrame loadedDf = sql.load(tmp.getRoot().getAbsolutePath() + > "/parquet"); > loadedDf.registerTempTable("loadedDf"); > List<int[]> moreInts = sql.sql("select col2s from loadedDf").javaRDD() > .map(row -> (int[]) row.get(0)).collect(); > assertEquals(1, moreInts.size()); > assertArrayEquals(new int[]{1, 2, 3}, moreInts.get(0)); > } > {code} > {code} > root > |-- col1: string (nullable = false) > |-- col2s: array (nullable = true) > | |-- element: integer (containsNull = true) > ERROR org.apache.spark.executor.Executor Exception in task 7.0 in stage 1.0 > (TID 15) > java.lang.ClassCastException: [I cannot be cast to scala.collection.Seq > at > org.apache.spark.sql.catalyst.expressions.Explode.eval(generators.scala:125) > ~[spark-catalyst_2.10-1.3.0.jar:1.3.0] > at > org.apache.spark.sql.execution.Generate$$anonfun$2$$anonfun$apply$1.apply(Generate.scala:70) > ~[spark-sql_2.10-1.3.0.jar:1.3.0] > at > org.apache.spark.sql.execution.Generate$$anonfun$2$$anonfun$apply$1.apply(Generate.scala:69) > ~[spark-sql_2.10-1.3.0.jar:1.3.0] > at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala:371) > ~[scala-library-2.10.4.jar:na] > at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:327) > ~[scala-library-2.10.4.jar:na] > at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:327) > ~[scala-library-2.10.4.jar:na] > at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:327) > ~[scala-library-2.10.4.jar:na] > at scala.collection.Iterator$class.foreach(Iterator.scala:727) > ~[scala-library-2.10.4.jar:na] > at scala.collection.AbstractIterator.foreach(Iterator.scala:1157) > ~[scala-library-2.10.4.jar:na] > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org