Issue 8550: Check for a good table_definition cache value

src/Database/DBA.php

@@ -741,6 +741,17 @@ class DBA
 		return DI::dba()->processlist();
 	}
 
+	/**
+	 * Fetch a database variable
+	 *
+	 * @param string $name
+	 * @return string content
+	 */
+	public static function getVariable(string $name)
+	{
+		return DI::dba()->getVariable($name);
+	}
+
 	/**
 	 * Checks if $array is a filled array with at least one entry.
 	 *