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

- 日本語

# 7.14. 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.

- 7.14.1. `between`
- 7.14.2. edit_distance
- 7.14.3. `geo_distance`
- 7.14.4. geo_in_circle
- 7.14.5. geo_in_rectangle
- 7.14.6. `highlight_full`
- 7.14.7. `highlight_html`
- 7.14.8. `html_untag`
- 7.14.9. `in_values`
- 7.14.10. now
- 7.14.11. `prefix_rk_search()`
- 7.14.12. `query`
- 7.14.13. rand
- 7.14.14. `snippet_html`
- 7.14.15. `sub_filter`
- 7.14.16. `vector_size`