# Mroonga

- [Mroonga Overview](/docs/server/server-usage/storage-engines/mroonga/mroonga-overview.md): Learn about the Mroonga storage engine, which provides fast CJK-ready full-text searching using column-based storage and supports Groonga's features.
- [About Mroonga](/docs/server/server-usage/storage-engines/mroonga/about-mroonga.md): This page provides version history, installation instructions, and limitations for the Mroonga storage engine, highlighting its full-text search capabilities.
- [Mroonga Status Variables](/docs/server/server-usage/storage-engines/mroonga/mroonga-status-variables.md): A list of status variables specific to Mroonga, used to monitor internal operations like fast line counts and order-by-limit optimizations.
- [Mroonga System Variables](/docs/server/server-usage/storage-engines/mroonga/mroonga-system-variables.md)
- [Mroonga User-Defined Functions](/docs/server/server-usage/storage-engines/mroonga/mroonga-user-defined-functions.md): Extend Mroonga's functionality in MariaDB Server with user-defined functions. Learn how to create custom functions to enhance full-text search and data processing capabilities.
- [Creating Mroonga User-Defined Functions](/docs/server/server-usage/storage-engines/mroonga/mroonga-user-defined-functions/creating-mroonga-user-defined-functions.md): Instructions on how to manually create Mroonga's UDFs if they were not automatically installed, ensuring full functionality.
- [last\_insert\_grn\_id](/docs/server/server-usage/storage-engines/mroonga/mroonga-user-defined-functions/last_insert_grn_id.md): This UDF returns the unique ID assigned by Groonga for the last inserted record, useful for tracking internal record identifiers.
- [mroonga\_command](/docs/server/server-usage/storage-engines/mroonga/mroonga-user-defined-functions/mroonga_command.md): Execute raw Groonga commands directly from MariaDB using this UDF, allowing for advanced administration and inspection of the Groonga database.
- [mroonga\_escape](/docs/server/server-usage/storage-engines/mroonga/mroonga-user-defined-functions/mroonga_escape.md): This function escapes special characters in a string to make it safe for use in Mroonga full-text search queries.
- [mroonga\_highlight\_html](/docs/server/server-usage/storage-engines/mroonga/mroonga-user-defined-functions/mroonga_highlight_html.md): Highlight keywords within a text string using HTML tags, making it easy to display search results with matched terms emphasized.
- [mroonga\_normalize](/docs/server/server-usage/storage-engines/mroonga/mroonga-user-defined-functions/mroonga_normalize.md): This UDF normalizes a given string using Groonga's normalizers, ensuring consistent text processing for accurate indexing and searching.
- [mroonga\_snippet](/docs/server/server-usage/storage-engines/mroonga/mroonga-user-defined-functions/mroonga_snippet.md): This function extracts a snippet of text surrounding a keyword from a document, providing necessary context for search result displays.
- [mroonga\_snippet\_html](/docs/server/server-usage/storage-engines/mroonga/mroonga-user-defined-functions/mroonga_snippet_html.md): Similar to mroonga\_snippet, this function generates HTML-formatted snippets, automatically wrapping matched keywords in tags for web display.