chenjunjiedada commented on a change in pull request #2538:
URL: https://github.com/apache/iceberg/pull/2538#discussion_r623547421
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File path: flink/src/test/java/org/apache/iceberg/flink/SimpleDataUtil.java
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@@ -191,9 +190,19 @@ public static void assertTableRows(Table table,
List<RowData> expected) throws I
public static void assertTableRecords(Table table, List<Record> expected)
throws IOException {
table.refresh();
+
Review comment:
Because the metadata column projection logic produces additional columns
even when the `requiredSchema` doesn't contain them and that is why we use
`StructLikeSet`. The `_pos` column shows up only when positional deletes
exist, the `_deleted` marker shows up when any of the deletes exist.
The failed unit test contains only equality delete which produces only
`_deleted` column, so it failed with `HashMultiSet` comparison. But when the
unit test, for example
`TestIcebergFilesCommitter.TestCommitTwoCheckpointsInSingleTxn`, contains a
positional delete, the unit test fails as well due to it has the additional
column `_pos`. The following patch for the unit test could test it.
```
- DeleteFile deleteFile1 = writeEqDeleteFile(appenderFactory,
"delete-file-1", ImmutableList.of(delete3));
+ DeleteFile deleteFile1 = writePosDeleteFile(appenderFactory,
+ "pos-delete-file-1",
+ ImmutableList.of(Pair.of(dataFile1.path(), 3L)));
```
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