Java：mysql子查询语法错误

Question

任何人都可以向我解释一下，为什么这个mysql脚本可以在我的Mysql Workbench上工作，而不是在我的tomcat服务器上？

SET SQL_SAFE_UPDATES=0;
    Delete from t_dependant 
where
    pk_dependant in (select 
        *
    from
        (select 
            pk_dependant
        from
            t_dependant
        where
            fk_master = $pk_master_to_delete) x );
Delete from t_master 
where
    pk_master = pk_master_to_delete;

MySQLSyntaxErrorException（id = 3440）

  

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException：您的SQL语法中有错误;检查与MySQL服务器版本对应的手册，以便在'DELETE FROM t_dependant WHERE pk_dependant'（SELECT * FROM（SELECT pk_dependant a'at line 1

）附近使用正确的语法

编辑：

这是我在tomcat服务器上运行的代码：

java.sql.PreparedStatement prestmt = null;
        ResultSet rs = null;
        boolean success = true;

            try {
                GlobalStuff.getDBConnection().setAutoCommit(false);
                String sql ="SET SQL_SAFE_UPDATES=0;"
                        +"DELETE FROM t_dependant "
                        +"WHERE pk_dependant in ("
                        +"SELECT * FROM "
                        +"(SELECT pk_dependant from t_dependant WHERE fk_master = " + pk_master_to_delete
                        +") subquery); "
                        +"DELETE FROM t_master WHERE pk_master = " + pk_master_to_delete;
                prestmt = GlobalStuff.getDBConnection().prepareStatement(sql);
                rs = prestmt.executeQuery();
            }catch...