问题描述

我有许多可能需要几分钟才能运行的 pl/sql 过程.在开发它们时，我添加了一些打印语句来帮助调试并提供一些反馈和进度指示器.最初，我在小型测试集上运行这些，输出几乎是即时的.现在我正在测试需要几分钟才能运行的更大的测试集，我发现打印到控制台不再合适，因为在过程结束之前不会打印任何内容.我习惯于在不缓冲输出并立即打印的环境中工作，并且为简单的调试和诊断添加简单的打印语句是很常见的.

I have a number of pl/sql procedures that can take several minutes to run. While developing them, I've added a few print statements to help debug and also provide some feedback and progress indicators. Initially, I ran these on small test sets and output was almost instantaneous. Now that I'm testing with larger test sets that take several minutes to run, I find that printing to the console is no longer suitable, because nothing gets printed until the procedure ends. I'm used to working in environments that do not buffer their output and print it immediately and adding simple print-statements for simple debugging and diagnostic is common.

在 pl/sql 中是否可以立即打印输出(不缓冲)?如果不是，人们推荐哪些替代方案来获得类似的结果?

Is it possible in pl/sql to print output immediately (not buffered)? If not, what alternatives do people recommend to get a similar result?

推荐答案

您可以拥有一个使用自治事务将消息写入表的过程，例如:

You can have a procedure that writes messages to a table using an autonomous transaction something like:

procedure log (p_message)
is
    pragma autonomous_transaction;
begin
    insert into message_log (user, datetime, message)
    values (user, sysdate, p_message);
    commit;
end;

然后从另一个 Oracle 会话监视该表.

Then monitor the table from another Oracle session.

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