See T230418: Drop support for MSSQL and Oracle from core
- compatibility policy=master: they should be dropped after all current MediaWiki versions are unsupported (in June 2021)
- compatibility policy=rel: they may be dropped now
Per https://codesearch.wmflabs.org/extensions/?q=oracle%7Cmssql&i=nope&files=&repos=
| Extension | Compatibility policy | Support for |
| SimpleSecurity | unmaintained | oracle, db2 |
| MediaWiki-extensions-Cargo | master | mssql |
| MediaWiki-extensions-Comments | unspecified | oracle |
| MediaWiki-extensions-OATHAuth | master | oracle |
| MediaWiki-extensions-ReplaceText | unspecified | oracle |
The entire extension may be archived:
- Extension:MSSQLBackCompat
- Extension:OracleTextSearch