### Description

This is to investigate what we could do to support the data streams in SQL. The backing indices can be queried already, but to address them similarly as they're queried over QDSL one would need to construct a pattern learned out of band and not through SQL metadata discovery mechanisms.
x-pack/plugin/ql/src/main/java/org/elasticsearch/xpack/ql/index/IndexResolver.java
boolean normalized = false;
            return new KeywordEsField(fieldName, props, isAggregateable, length, normalized, isAlias);
        }
        if (esType == DATETIME) {
            return DateEsField.dateEsField(fieldName, props, isAggregateable);
        }
        if (esType == UNSUPPORTED) {
            return new UnsupportedEsField(fieldName, typeName, null, props);
        }
        return new EsField(fieldName, esType, props, isAggregateable, isAlias);
    }
    private static FieldCapabilitiesRequest createFieldCapsRequest(
        String index,
        IndicesOptions indicesOptions,
        Map<String, Object> runtimeMappings
    ) {
        return new FieldCapabilitiesRequest().indices(Strings.commaDelimitedListToStringArray(index))
            .fields("*")
            .includeUnmapped(true)
            .runtimeFields(runtimeMappings)
            
            
            .indicesOptions(indicesOptions);
    }
    private static FieldCapabilitiesRequest createFieldCapsRequest(
        String index,
        boolean includeFrozen,
        Map<String, Object> runtimeMappings
    ) {