Description
partitions with null values we get a NPE on partition discovery, earlier we use to get `DEFAULT_PARTITION_NAME`
[info] java.lang.NullPointerException:
[info] at org.apache.spark.sql.execution.datasources.PartitioningUtils$.removeLeadingZerosFromNumberTypePartition(PartitioningUtils.scala:362)
[info] at org.apache.spark.sql.execution.datasources.PartitioningUtils$.$anonfun$getPathFragment$1(PartitioningUtils.scala:355)
[info] at scala.collection.TraversableLike.$anonfun$map$1(TraversableLike.scala:286)
[info] at scala.collection.Iterator.foreach(Iterator.scala:943)
[info] at scala.collection.Iterator.foreach$(Iterator.scala:943)