GitHub user HyukjinKwon opened a pull request: https://github.com/apache/spark/pull/11752
[SPARK-3308][SQL][FOLLOW-UP] Parse JSON rows having an array type and a struct type in the same fieild ## What changes were proposed in this pull request? This https://github.com/apache/spark/pull/2400 added the support to parse JSON rows wrapped with an array. However, when the given data contains array data and struct data in the same field as below: ```json {"a": {"b": 1}} {"a": []} ``` and the schema is given as below: ```scala val schema = StructType( StructField("a", StructType( StructField("b", StringType) :: Nil )) :: Nil) ``` This throws an exception below: ```java Exception in thread "main" org.apache.spark.SparkException: Job aborted due to stage failure: Task 7 in stage 0.0 failed 4 times, most recent failure: Lost task 7.3 in stage 0.0 (TID 10, 192.168.1.170): java.lang.ClassCastException: org.apache.spark.sql.types.GenericArrayData cannot be cast to org.apache.spark.sql.catalyst.InternalRow at org.apache.spark.sql.catalyst.expressions.BaseGenericInternalRow$class.getStruct(rows.scala:50) at org.apache.spark.sql.catalyst.expressions.GenericMutableRow.getStruct(rows.scala:247) at org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificPredicate.eval(Unknown Source) ... ``` For other data types, in this case it converts the given values are `null` but only this case emits an exception. This PR makes the support for wrapped rows applied only at the top level. ## How was this patch tested? Unit tests were used and `./dev/run_tests` for code style tests. You can merge this pull request into a Git repository by running: $ git pull https://github.com/HyukjinKwon/spark SPARK-3308-follow-up Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/11752.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #11752 ---- commit 4ab1e80e8bca868fc2387cf74004cc44b6e4664a Author: hyukjinkwon <gurwls...@gmail.com> Date: 2016-03-16T04:36:56Z Parse JSON rows having an array type and a struct type in the same field. ---- --- 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