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

- 日本語版はこちら

# 7.12. 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.

- 7.12.1. between
- 7.12.2. edit_distance
- 7.12.3. geo_distance
- 7.12.4. geo_in_circle
- 7.12.5. geo_in_rectangle
- 7.12.6. highlight_full
- 7.12.7. highlight_html
- 7.12.8. html_untag
- 7.12.9. in_values
- 7.12.10. now
- 7.12.11. query
- 7.12.12. rand
- 7.12.13. snippet_html
- 7.12.14. sub_filter