```
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
from test
            | drop dep.*
            """, "Found 1 problem\n" + "line 2:8: No match found for [dep.*]", "mapping-multi-field-with-nested.json");
    }
    public void testSupportedDeepHierarchy() {
        assertProjectionWithMapping("""
            from test
            | keep some.dotted.field, some.string.normalized
            """, "mapping-multi-field-with-nested.json", "some.dotted.field", "some.string.normalized");
    }
    public void testDropSupportedDottedField() {
        assertProjectionWithMapping(
            """
                from test
                | drop some.dotted.field
                """,
            "mapping-multi-field-variation.json",
            "bool",
            "date",
            "date_nanos",
            "float",
            "foo_type",
            "int",
            "keyword",
            "point",
            "shape",
            "some.ambiguous",
            "some.ambiguous.normalized",
            "some.ambiguous.one",
            "some.ambiguous.two",