Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':id OR :id IS NULL)' at line 5\r\n### The error may exist in file [E:\\IdeaProjects\\taihaolian\\target\\classes\\mapper\\AdvertMapper.xml]\r\n### The error may involve defaultParameterMap\r\n### The error occurred while setting parameters\r\n### SQL: SELECT a.*, p.id AS position_id, p.name AS position_name, m.id AS media_id, m.file_name, m.file_type, m.file_url FROM advert a LEFT JOIN ad_position p ON a.position_id = p.id LEFT JOIN media_file m ON a.media_id = m.id WHERE (id = :id OR :id IS NULL)\r\n### Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':id OR :id IS NULL)' at line 5\n; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':id OR :id IS NULL)'

这个错误提示是 MyBatis 在执行 SQL 查询时发生了语法错误。错误位置在查询语句的 WHERE 子句中，可能是由于 SQL 语法不正确导致的。具体地说，错误信息中提示说在第 5 行附近有语法错误，而查询语句中的 WHERE 子句只有一行，因此可以初步判断错误是由于 :id OR :id IS NULL 这部分代码语法错误导致的。可能是 :id 这个占位符没有被正确解析为查询参数，或者是 SQL 语法不支持这种写法。需要进一步检查代码和 SQL 语法。