rdblue commented on code in PR #7913:
URL: https://github.com/apache/iceberg/pull/7913#discussion_r1414697348
##########
core/src/test/java/org/apache/iceberg/view/ViewCatalogTests.java:
##########
@@ -1534,4 +1535,90 @@ public void updateViewLocationConflict() {
.isInstanceOf(NoSuchViewException.class)
.hasMessageContaining("View does not exist: ns.view");
}
+
+ @Test
+ public void concurrentReplaceViewVersion() {
+ TableIdentifier identifier = TableIdentifier.of("ns", "view");
+
+ if (requiresNamespaceCreate()) {
+ catalog().createNamespace(identifier.namespace());
+ }
+
+ assertThat(catalog().viewExists(identifier)).as("View should not
exist").isFalse();
+
+ View view =
+ catalog()
+ .buildView(identifier)
+ .withSchema(SCHEMA)
+ .withDefaultNamespace(identifier.namespace())
+ .withQuery("trino", "select * from ns.tbl")
+ .create();
+
+ assertThat(catalog().viewExists(identifier)).as("View should
exist").isTrue();
+
+ ReplaceViewVersion replaceViewVersion =
+ view.replaceVersion()
+ .withQuery("trino", "select count(*) from ns.tbl")
+ .withSchema(SCHEMA)
+ .withDefaultNamespace(identifier.namespace());
+
+ ReplaceViewVersion replaceViewVersionConcurrent =
+ view.replaceVersion()
+ .withQuery("spark", "select count(*) from ns.tbl")
+ .withSchema(OTHER_SCHEMA)
+ .withDefaultNamespace(identifier.namespace());
Review Comment:
This doesn't actually simulate concurrent commits. This uses the same `view`
instance and the `internalApply` method calls refresh. So what's actually
happening is that the `ViewVersionReplace` is basing its changes on the correct
metadata. That's why in the table version of similar tests, we actually load
two separate instance of the table. That way the instance isn't up-to-date when
the changes are created.
In addition, because `internalApply` calls refresh, even if you were to use
a separate `view` instance it will still update itself before creating the
changes.
I think to fix this, we should make the `internalApply` method
package-private so that we can call it. Then to commit you can call the
`ViewOperations` directly:
```java
trinoView = catalog.loadView(identifier);
ViewMetadata trinoUpdate = trinoView
.replaceVersion()
...
.internalApply();
ViewOperations trinoOps = ((BaseView) trinoView).operations();
trinoOps.commit(trinoOps.current(), trinoUpdate);
```
That will exercise the server-side retry case, I think.
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