Mroonga provides a number of User-defined functions (UDFs)
| Title | Description |
|---|---|
| Creating Mroonga User-Defined Functions | How to install Mroonga's user-defined functions. |
| last_insert_grn_id | Returns the unique Groonga id of the last-inserted record. |
| mroonga_command | Pass a command to Groonga to execute |
| mroonga_escape | Escaping a string. |
| mroonga_highlight_html | Highlights the specified keywords in the target text. |
| mroonga_normalize | Uses Groonga's normalizer to normalize text. |
| mroonga_snippet | A keyword with surrounding text, or the keyword in context. |
| mroonga_snippet_html | It provides a keyword with surrounding text, or the keyword in context. |
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https://mariadb.com/kb/en/mroonga-user-defined-functions/