This code
SELECT d.dummy
INTO x
FROM dual d
JOIN sys.dual ON ( dual.dummy = d.dummy )
WHERE d.dummy = 'X';
is flagged with
Add a condition for table ‘SYS.DUAL’ or remove this table from the SQL query.sonarlint(plsql:S5141)
There is a condition though, the schema (sys) is just not repeated in the join condition.
Language: Oracle PL/SQL
SonarQube 9.9.1