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Posted to issues@spark.apache.org by "Johan Lasperas (Jira)" <ji...@apache.org> on 2023/04/20 12:20:00 UTC
[jira] [Updated] (SPARK-43217) Correctly recurse into maps of maps and arrays of arrays in StructType.findNestedField
[ https://issues.apache.org/jira/browse/SPARK-43217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Johan Lasperas updated SPARK-43217:
-----------------------------------
Description:
[StructType.findNestedField|https://github.com/apache/spark/blob/db2625c70a8c3aff64e6a9466981c8dd49a4ca51/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala#L325] is unable to reach nested field below two directly nested maps or arrays. Whenever it reaches a map or an array, it'll throw an `invalidFieldName` exception if the child is not a struct.
The following throws 'Field name `a`.`element`.element`.`i` is invalid: `a`.`element`.`element` is not a struct.', even though the access path is valid:
{code:java}
val schema = new StructType()
.add("a", ArrayType(ArrayType(
new StructType().add("i", "int"))))
findNestedField(Seq("a", "element", "element", "i"), schema) {code}
was:
[StructType.findNestedField|https://github.com/apache/spark/blob/db2625c70a8c3aff64e6a9466981c8dd49a4ca51/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala#L325] is unable to reach nested field below two directly nested maps or arrays. Whenever it reaches a map or an array, it'll throw an `invalidFieldName` exception if the child is not a struct.
The following throws 'Field name `a`.`element`.element`.`i` is invalid: `a`.`element`.`element` is not a struct.', even though the access path is valid:
```
val schema = new StructType()
.add("a", ArrayType(ArrayType(
new StructType().add("i", "int"))))
findNestedField(Seq("a", "element", "element", "i"), schema)
```
> Correctly recurse into maps of maps and arrays of arrays in StructType.findNestedField
> --------------------------------------------------------------------------------------
>
> Key: SPARK-43217
> URL: https://issues.apache.org/jira/browse/SPARK-43217
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 3.4.0
> Reporter: Johan Lasperas
> Priority: Minor
>
> [StructType.findNestedField|https://github.com/apache/spark/blob/db2625c70a8c3aff64e6a9466981c8dd49a4ca51/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala#L325] is unable to reach nested field below two directly nested maps or arrays. Whenever it reaches a map or an array, it'll throw an `invalidFieldName` exception if the child is not a struct.
> The following throws 'Field name `a`.`element`.element`.`i` is invalid: `a`.`element`.`element` is not a struct.', even though the access path is valid:
> {code:java}
> val schema = new StructType()
> .add("a", ArrayType(ArrayType(
> new StructType().add("i", "int"))))
> findNestedField(Seq("a", "element", "element", "i"), schema) {code}
>
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