# groonga - An open-source fulltext search engine and column store.

- 日本語版はこちら

### Navigation

- index
- next |
- previous |
- Groonga v3.1.0 documentation »
- 8. リファレンスマニュアル »

# 8.11. Function

Function can be used in some commands. For example, you can use function in `--filter`, `--scorer` and `output_columns` options of select.

This section describes about function and built-in functions.

TODO: Add documentations about function.

- 8.11.1. edit_distance
- 8.11.2. geo_distance
- 8.11.3. geo_in_circle
- 8.11.4. geo_in_rectangle
- 8.11.5. html_untag
- 8.11.6. now
- 8.11.7. query
- 8.11.8. rand
- 8.11.9. snippet_html
- 8.11.10. sub_filter

### Navigation

- index
- next |
- previous |
- Groonga v3.1.0 documentation »
- 8. リファレンスマニュアル »