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      ORACLE 中的睡眠功能

      Sleep function in ORACLE(ORACLE 中的睡眠功能)
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                本文介绍了ORACLE 中的睡眠功能的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                问题描述

                我需要在 ORACLE 中执行 SQL 查询需要一定的时间.所以我写了这个函数:

                I need execute an SQL query in ORACLE it takes a certain amount of time. So I wrote this function:

                CREATE OR REPLACE FUNCTION MYSCHEMA.TEST_SLEEP
                (
                TIME_  IN  NUMBER
                )
                RETURN INTEGER IS
                 BEGIN
                   DBMS_LOCK.sleep(seconds => TIME_);
                RETURN 1;
                 EXCEPTION
                   WHEN OTHERS THEN
                   RAISE;
                   RETURN 1;
                END TEST_SLEEP;
                

                我就是这样调用的

                SELECT TEST_SLEEP(10.5) FROM DUAL
                

                但为了工作,我需要将 DBMS_LOCK 设置授予过程的所有者.

                but to work I need set grant of DBMS_LOCK to the owner of the procedure.

                如何在不使用 DBMS_LOCK.sleep 函数的情况下重写此函数?

                How I can rewrite this function without using the DBMS_LOCK.sleep function?

                推荐答案

                如果没有授予对 DBMS_LOCK.sleep 的访问权限,这会起作用,但这是一个可怕的黑客:

                Short of granting access to DBMS_LOCK.sleep, this will work but it's a horrible hack:

                IN_TIME INT; --num seconds
                v_now DATE;
                
                -- 1) Get the date & time 
                SELECT SYSDATE 
                  INTO v_now
                  FROM DUAL;
                
                -- 2) Loop until the original timestamp plus the amount of seconds <= current date
                LOOP
                  EXIT WHEN v_now + (IN_TIME * (1/86400)) <= SYSDATE;
                END LOOP;
                

                这篇关于ORACLE 中的睡眠功能的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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