RussellSpitzer commented on issue #6670:
URL: https://github.com/apache/iceberg/issues/6670#issuecomment-1406772042
Another high level repo using a String Collision
```java
@Test
public void testDeleteWithCollision() {
Schema schema = new Schema(Types.NestedField.of(0, false, "x",
Types.StringType.get()));
PartitionSpec spec =
PartitionSpec.builderFor(schema).identity("x").build();
Table collisionTable =
TestTables.create(tableDir, "hashcollision", schema, spec,
formatVersion);
PartitionData partitionOne = new PartitionData(spec.partitionType());
partitionOne.set(0, "Aa");
PartitionData partitionTwo = new PartitionData(spec.partitionType());
partitionTwo.set(0, "BB");
Assert.assertEquals(
StructLikeWrapper.forType(spec.partitionType()).set(partitionOne).hashCode(),
StructLikeWrapper.forType(spec.partitionType()).set(partitionTwo).hashCode());
Metrics metrics = new Metrics(1L, null, null, null, null);
DataFile testFileOne =
DataFiles.builder(spec)
.withPartition(partitionOne)
.withPath("/g1.parquet")
.withFileSizeInBytes(100)
.withMetrics(metrics)
.build();
DataFile testFileTwo =
DataFiles.builder(spec)
.withPartition(partitionTwo)
.withMetrics(metrics)
.withFileSizeInBytes(100)
.withPath("/g2.parquet")
.build();
collisionTable.newFastAppend().appendFile(testFileOne).appendFile(testFileTwo).commit();
Assert.assertEquals(
"We should have two files",
2,
Lists.newArrayList(collisionTable.newScan().planFiles().iterator()).size());
collisionTable.newDelete().deleteFromRowFilter(Expressions.equal("x",
"BB")).commit();
Assert.assertEquals(
"We should have deleted one of them",
1,
Lists.newArrayList(collisionTable.newScan().planFiles().iterator()).size());
}
```
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