With the property set this way, any SQL statements from the application that are not bound to the database will result in an SQL error.
采用这种方式设置该属性，应用程序中任何未绑定到数据库的sql语句都将产生SQL错误。
If the tables don't exist (which is the case if the database was just created), an error message is displayed; but as the preceding SQL comments indicate, you can safely ignore those messages.
如果表不存在(当数据库刚创建时就会出现这种情况)，将显示一条错误消息；但前面的SQL注释指明，您可以安全地忽略这些消息。
To force a lock timeout error, establish a first database connection and execute some SQL statements simulating a real transaction on the table employee.
为了促使一个锁定超时错误发生，我们首先建立一个数据库连接，并执行一些sql语句来模拟表employee上的真实事务。
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