[GitHub] [spark] gcmerz opened a new pull request #24722: Fix for avro deserialization on union types with multiple non-null types

[GitBox <gi...@apache.org>]

gcmerz opened a new pull request #24722: Fix for avro deserialization on union types with multiple non-null types
URL: https://github.com/apache/spark/pull/24722
 
 
   ## What changes were proposed in this pull request?
   
   This is a fix for https://github.com/palantir/spark/issues/560 where in a union avro type with more than one non-null value (for instance `["string", "null", "int"]`) the deserialization to a DataFrame would throw a `java.lang.ArrayIndexOutOfBoundsException`. The issue was that the `fieldWriter` relied on the index from the avro schema before null were filtered out.
   
   ## How was this patch tested?
   
   A test for the case of multiple non-null values was added and the tests were run using sbt by running `testOnly org.apache.spark.sql.avro.AvroSuite`
   
   Please review https://spark.apache.org/contributing.html before opening a pull request.
   

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