Question iReport Development No.4 - Sentinel event schema name

This question is for Sentinel situation. How to get database
information using Oracle, MS SQL, MySQL.
We could get table name that SELECT command is executed with using tag
name "fn".
However, we can not get database name.
Only Oracle, we can get database name using tag name "rv36'. However,
we can not get it using same tag name from Microsoft SQL and MySQL.
What kind of tag name can we get database name in case of Microsoft
SQL and MySQL?
Please see following URL: 'Event schema - Developer Community'

Please let me know how to solve this issue or work-around.

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