szehon-ho opened a new issue #2783:
URL: https://github.com/apache/iceberg/issues/2783
As of Spark 3, it seems more predicates are pushed down. For example, take
this join:
```
Dataset<Row> stringDs = spark.createDataset(Arrays.asList("my_path"),
Encoders.STRING())
.toDF("file_path");
SparkCatalog catalog = (SparkCatalog)
spark.sessionState().catalogManager().catalog(catalogName);
String[] tableIdentifiers = tableName.split("\\.");
Identifier metaId = Identifier.of(
new String[]{tableIdentifiers[1], tableIdentifiers[2]}, "entries");
SparkTable metaTable = catalog.loadTable(metaId);
Dataset<Row> entriesDs = Dataset.ofRows(spark,
DataSourceV2Relation.create(metaTable, Some.apply(catalog), Some.apply(
metaId)));
Column joinCond =
entriesDs.col("data_file.file_path").equalTo(stringDs.col("file_path"));
Dataset<Row> res = entriesDs.join(stringDs, joinCond);
boolean empty = res.isEmpty();
Assert.assertEquals(true, empty);
```
It will result in the following NPE:
```Driver stacktrace:
org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in
stage 5.0 failed 1 times, most recent failure: Lost task 0.0 in stage 5.0 (TID
5) (10.0.0.45 executor driver): java.lang.IllegalStateException: Unknown type
for int field. Type name: java.lang.String
at
org.apache.iceberg.spark.source.StructInternalRow.getInt(StructInternalRow.java:131)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.writeFields_0_0$(Unknown
Source)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.apply(Unknown
Source)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at
org.apache.iceberg.common.DynMethods$UnboundMethod.invokeChecked(DynMethods.java:65)
at
org.apache.iceberg.common.DynMethods$UnboundMethod.invoke(DynMethods.java:77)
at
org.apache.iceberg.common.DynMethods$BoundMethod.invoke(DynMethods.java:180)
at
org.apache.iceberg.spark.source.RowDataReader.lambda$newDataIterable$3(RowDataReader.java:193)
at
org.apache.iceberg.io.CloseableIterable$4$1.next(CloseableIterable.java:113)
at org.apache.iceberg.io.FilterIterator.advance(FilterIterator.java:66)
at org.apache.iceberg.io.FilterIterator.hasNext(FilterIterator.java:50)
at
org.apache.iceberg.spark.source.BaseDataReader.next(BaseDataReader.java:87)
at
org.apache.spark.sql.execution.datasources.v2.PartitionIterator.hasNext(DataSourceRDD.scala:79)
at
org.apache.spark.sql.execution.datasources.v2.MetricsIterator.hasNext(DataSourceRDD.scala:112)
at
org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:37)
at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:460)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown
Source)
at
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
at
org.apache.spark.sql.execution.WholeStageCodegenExec$$anon$1.hasNext(WholeStageCodegenExec.scala:755)
at
org.apache.spark.sql.execution.SparkPlan.$anonfun$getByteArrayRdd$1(SparkPlan.scala:345)
at
org.apache.spark.rdd.RDD.$anonfun$mapPartitionsInternal$2(RDD.scala:898)
at
org.apache.spark.rdd.RDD.$anonfun$mapPartitionsInternal$2$adapted(RDD.scala:898)
at
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:52)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:373)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:337)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:90)
at org.apache.spark.scheduler.Task.run(Task.scala:131)
at
org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$3(Executor.scala:497)
at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1439)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:500)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
```
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