
Filing this issue to track a question/comment that was raised by @ywangd  here https://github.com/elastic/elasticsearch/pull/98309#discussion_r1294115440

One question I do have is why we chose to [execute the LookupRequest with the enrich origin](https://github.com/elastic/elasticsearch/blob/2e4440ff1c0decf79f8a40688566411f7d518aa7/x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/enrich/EnrichLookupService.java#L141C2-L141C2). It means the following query works when the user has access to only the playlist index without access to either the songs enrich policy or its associated index.

```
FROM playlist | ENRICH songs ON song_id
```

It feels a bit weird to me that we have no control on who can use what enrich process. That said, we don't have a good story around enrich and ingest pipeline either, i.e. we have no control over who can use what pipeline where a pipeline can contain an enrich processor. There have been quite a few complaints from users and we have an https://github.com/elastic/elasticsearch/issues/57586 for it. I wonder whether we should not repeat the problem here with ES|QL. On the surface, it might be easier to tackle compared to ingest pipelines since ES|QL is read-only and has no "bulk" operations. What do you think?
x-pack/plugin/ql/src/test/java/org/elasticsearch/xpack/ql/expression/AttributeMapTests.java
Object[] array = keySet.toArray();
        assertThat(array, arrayWithSize(3));
        assertThat(array, arrayContaining(one, two, three));
    }
    public void testValues() {
        AttributeMap<String> m = threeMap();
        Collection<String> values = m.values();
        assertThat(values, hasSize(3));
        assertThat(values, contains("one", "two", "three"));
    }
    public void testEntrySet() {
        Attribute one = a("one");
        Attribute two = a("two");
        Attribute three = a("three");
        Set<Entry<Attribute, String>> set = threeMap().entrySet();
        assertThat(set, hasSize(3));
        List<Attribute> keys = set.stream().map(Map.Entry::getKey).collect(toList());
        List<String> values = set.stream().map(Map.Entry::getValue).collect(toList());
        assertThat(keys, hasSize(3));
        assertThat(values, hasSize(3));
        assertThat(values, contains("one", "two", "three"));
    }
    public void testCopy() {
        AttributeMap<String> m = threeMap();
        AttributeMap<String> copy = AttributeMap.<String>builder().putAll(m).build();
        assertThat(m, is(copy));
    }
}