rfyu opened a new pull request, #9903:
URL: https://github.com/apache/iceberg/pull/9903
For a table in v1 format,after deleting a partition, the new data will be
stored in the partition with a null partition value. When querying this data
using `FindFiles.inPartitions`, the following exception will be thrown.
```
java.lang.NullPointerException: Cannot create expression literal from null
at
org.apache.iceberg.relocated.com.google.common.base.Preconditions.checkNotNull(Preconditions.java:921)
at org.apache.iceberg.expressions.Literals.from(Literals.java:60)
at
org.apache.iceberg.expressions.UnboundPredicate.<init>(UnboundPredicate.java:40)
at
org.apache.iceberg.expressions.Expressions.equal(Expressions.java:169)
at org.apache.iceberg.FindFiles$Builder.inPartitions(FindFiles.java:183)
at org.apache.iceberg.FindFiles$Builder.inPartitions(FindFiles.java:157)
at
org.apache.iceberg.TestFindFiles.testInPartitionsAfterRemovePartitionField(TestFindFiles.java:151)
```
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