> ## Documentation Index
> Fetch the complete documentation index at: https://docs.paradedb.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 0.21.5

## Stability Improvements 💪

* Fixed a rare query hang caused by an upstream Tantivy change
* Fixed an issue where `pg_dump`/`pg_restore` would not work if a `pdb.*` tokenizer contained filters

## New Features 🎉

### Columnar Storage for Literal Normalized Fields

The [literal normalized](/documentation/tokenizers/available-tokenizers/literal-normalized) tokenizer now gets indexed
as columnar by default (in addition to the inverted index). This means that literal normalized fields can take part in [aggregate](/documentation/aggregates/overview) and [Top K](documentation/sorting/topk)
queries without the need for a separate [literal](/documentation/tokenizers/available-tokenizers/literal) tokenizer.

For example, if we use the literal normalized tokenizer on the `description` field:

```sql theme={null}
CREATE INDEX search_idx ON mock_items
USING bm25 (id, (description::pdb.literal_normalized))
WITH (key_field = 'id');
```

We can `ORDER BY` `description` and get a fast Top K query:

```sql theme={null}
SELECT * FROM mock_items
WHERE id @@@ pdb.all()
ORDER BY description
LIMIT 10;
```

And `description` can be used with `pdb.agg`:

```sql theme={null}
SELECT description, pdb.agg('{"value_count": {"field": "id"}}') FROM mock_items
WHERE id @@@ pdb.all()
GROUP BY description
ORDER BY description
LIMIT 10;
```

<Note>
  This change does not apply to indexes that have already been created. After
  upgrading to `0.21.5`, you will need to reindex to use this feature.
</Note>

The full changelog is available [on the GitHub Release](https://github.com/paradedb/paradedb/releases/tag/v0.21.5).