如何检查视图的存在 [英] How to check the existence of a view

问题描述

我需要创建一个脚本来检查视图是否已经存在. 我认为应该这样做，但是只是不想工作:)

I need to create a script that check if a view already exist. I think that this should do this, but there just don't want to work :)

IF EXISTS(select * FROM system.views where name = 'view_name');

关于我在做什么错的任何想法吗?

Any ideea about what I'm doing wrong?

推荐答案

尝试一下

DECLARE V_COUNT INTEGER;
BEGIN
  select COUNT(*) INTO V_COUNT FROM dba_views where view_name = 'view_name'; 
  -- use dba_views or all_views tables

  IF V_COUNT > 0 THEN 
  -- your code goes here
  END IF;
END;

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