> For the complete documentation index, see [llms.txt](https://muradkarakas.gitbook.io/sodium_documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://muradkarakas.gitbook.io/sodium_documentation/language-reference/connection/active-database-connection.md). # Active Database Connection ## Description * **Active Database Connection** term is used to determine which database connection will be used if database connection name is not specified by developer in application source code. * Initially, **Active Database Connection** is NULL. After the first successful attempt to open a new database connection has been made, **Active Database Connection** points to that connection. * In some specific user functions, **Active Database Connection** is automatically redirected to the any one of the specific database connection. * For the trigger functions of a \ element or an \ element in a data block, **Active Database Connection** is automatically points to data block's connection. * **Active Database Connection** can be set by using [set\_active\_database\_connection](/sodium_documentation/language-reference/built-in-functions/sodium-built-in-functions/database-related-functions/set_active_database_connection.md) in any user function. Sodium engine backups current active connection before execution of a user function begins. After execution of a user function ends, Sodium engines restores the original active connection setting back. Therefore, effects of [set\_active\_database\_connection](/sodium_documentation/language-reference/built-in-functions/sodium-built-in-functions/database-related-functions/set_active_database_connection.md) call is valid only in the function which is currently being executed. ## See also ### [set\_active\_database\_connection](/sodium_documentation/language-reference/built-in-functions/sodium-built-in-functions/database-related-functions/set_active_database_connection.md)