wooyeong commented on code in PR #9455:
URL: https://github.com/apache/iceberg/pull/9455#discussion_r1447417783
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spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/source/SparkTable.java:
##########
@@ -405,15 +407,25 @@ public boolean equals(Object other) {
return false;
}
- // use only name in order to correctly invalidate Spark cache
+ // use name and effective snapshot id to support time travel
SparkTable that = (SparkTable) other;
- return icebergTable.name().equals(that.icebergTable.name());
+ return icebergTable.name().equals(that.icebergTable.name())
+ && Objects.equals(effectiveSnapshotId(), that.effectiveSnapshotId());
}
@Override
public int hashCode() {
- // use only name in order to correctly invalidate Spark cache
- return icebergTable.name().hashCode();
+ // use name and effective snapshot id to support time travel
+ return Objects.hash(icebergTable.name(), effectiveSnapshotId());
+ }
+
+ public Long effectiveSnapshotId() {
Review Comment:
Please note the below statements, the `table`'s `currentSnapshot` is changed.
```java
assertThat(table).as("The SparkTable points to latest
snapshot").isEqualTo(firstTagTable);
assertThat(table).as("The SparkTable points to latest
snapshot").isEqualTo(secondTagTable);
```
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