[GitHub] [iceberg] rdblue commented on issue #1024: Add a merge-based row filter for equality deletes

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

rdblue commented on issue #1024:
URL: https://github.com/apache/iceberg/issues/1024#issuecomment-671621426


   #1301 added utility methods to support this, and a [merge-based filter for position deletes](https://github.com/apache/iceberg/blob/48360064447f2c93194b366240a044a353840e6e/core/src/main/java/org/apache/iceberg/deletes/Deletes.java#L115-L132):
   
   * [`FilterIterator`](https://github.com/apache/iceberg/blob/master/core/src/main/java/org/apache/iceberg/util/FilterIterator.java) is an iterator implementation that will filter another iterator
   * [`SortedMerge`](https://github.com/apache/iceberg/blob/master/core/src/main/java/org/apache/iceberg/util/SortedMerge.java) is a `CloseableIterable` that merges multiple streams of records into a single sorted stream
   
   Once sort orders are supported in file metadata, this should be fairly easy to implement.


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