---
title: Indexing JSON
---

When indexing JSON, ParadeDB automatically indexes all sub-fields of the JSON object. The type of each sub-field is also inferred automatically.
For example, consider the following statement where `metadata` is `JSONB`:

```sql
CREATE INDEX search_idx ON mock_items
USING bm25 (id, metadata)
WITH (key_field='id');
```

A single `metadata` JSON may look like:

```json
{ "color": "Silver", "location": "United States" }
```

ParadeDB will automatically index both `metadata.color` and `metadata.location` as text.

By default, all text sub-fields of a JSON object use the same tokenizer. The tokenizer can be configured the same way as text fields:

```sql
CREATE INDEX search_idx ON mock_items
USING bm25 (id, (metadata::pdb.ngram(2,3)))
WITH (key_field='id');
```

Instead of indexing the entire JSON, sub-fields of the JSON can be indexed individually. This allows for configuring separate tokenizers
within a larger JSON:

```sql
CREATE INDEX search_idx ON mock_items
USING bm25 (id, ((metadata->>'color')::pdb.ngram(2,3)))
WITH (key_field='id');
```
