```
show functions | keep description, *on | mv_expand description
```

```
{
    "error": {
        "root_cause": [
            {
                "type": "unresolved_exception",
                "reason": "Invalid call to dataType on an unresolved object ?description"
            }
        ],
        "type": "unresolved_exception",
        "reason": "Invalid call to dataType on an unresolved object ?description"
    },
    "status": 500
}
```

```
org.elasticsearch.xpack.ql.capabilities.UnresolvedException: Invalid call to dataType on an unresolved object ?description
        at org.elasticsearch.xpack.ql.expression.UnresolvedAttribute.dataType(UnresolvedAttribute.java:90)
        at org.elasticsearch.xpack.esql.analysis.Analyzer$ResolveRefs.resolveMvExpand(Analyzer.java:350)
        at org.elasticsearch.xpack.esql.analysis.Analyzer$ResolveRefs.doRule(Analyzer.java:334)
        at org.elasticsearch.xpack.ql.analyzer.AnalyzerRules$BaseAnalyzerRule.rule(AnalyzerRules.java:120)
        at org.elasticsearch.xpack.ql.analyzer.AnalyzerRules$AnalyzerRule.lambda$apply$0(AnalyzerRules.java:85)
```

It should throw a VerificationException and propagate the unresolved attribute message instead
x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/analysis/AnalyzerTests.java
private static final EsqlUnresolvedRelation UNRESOLVED_RELATION = new EsqlUnresolvedRelation(
        EMPTY,
        new TableIdentifier(EMPTY, null, "idx"),
        List.of()
    );
    private static final int MAX_LIMIT = EsqlPlugin.QUERY_RESULT_TRUNCATION_MAX_SIZE.getDefault(Settings.EMPTY);
    private static final int DEFAULT_LIMIT = EsqlPlugin.QUERY_RESULT_TRUNCATION_DEFAULT_SIZE.getDefault(Settings.EMPTY);
    public void testIndexResolution() {
        EsIndex idx = new EsIndex("idx", Map.of());
        Analyzer analyzer = analyzer(IndexResolution.valid(idx));
        var plan = analyzer.analyze(UNRESOLVED_RELATION);
        var limit = as(plan, Limit.class);
        assertEquals(new EsRelation(EMPTY, idx, NO_FIELDS), limit.child());
    }
    public void testFailOnUnresolvedIndex() {
        Analyzer analyzer = analyzer(IndexResolution.invalid("Unknown index [idx]"));
        VerificationException e = expectThrows(VerificationException.class, () -> analyzer.analyze(UNRESOLVED_RELATION));
        assertThat(e.getMessage(), containsString("Unknown index [idx]"));
    }
    public void testIndexWithClusterResolution() {
        EsIndex idx = new EsIndex("cluster:idx", Map.of());
        Analyzer analyzer = analyzer(IndexResolution.valid(idx));