Question Re: Sample Code: A Procedure To Drop Views in Technology Q&A

Sample Code: A Procedure To Drop Views

Former Member — Tue, 23 Feb 2010 22:02:32 GMT

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Description:
Know the view you want to drop, but don't know how to check for existence? Want to drop all views in the system, but have no automated way of doing it? Specify the view name as the parameter to drop only that view (IF it exists). Leave it empty to drop'em all.

Usage:
To drop a single view by name:

call sp_Drop_View('vw_People_Info');

To drop all views in a database:

call sp_Drop_View();

Code:

create procedure sp_Drop_View (IN @viewName varchar(128) DEFAULT 'NONE') begin IF @viewName = 'NONE' THEN FOR VIEW_NAME_FOR as VIEW_NAME_CURSOR dynamic scroll cursor for select st.table_name as VIEW_NAME from systab st where st.creator = 1 AND st.table_type = 'VIEW' order by st.table_name asc do execute immediate 'DROP VIEW ' || VIEW_NAME; END FOR; ELSE if exists(select 1 from sys.systable where table_name=@viewName and table_type='VIEW') then EXECUTE IMMEDIATE 'DROP VIEW ' || @viewName; end if; END IF; end;

Re: Sample Code: A Procedure To Drop Views

VolkerBarth — Wed, 24 Feb 2010 08:22:42 GMT

I have used a similar proc in the past, but fortunately SA 11.0.1 introduced the following handy syntax:

DROP VIEW IF EXISTS [owner].viewname

(As it does for other database objects like triggers etc.)

But of course it does not allow to drop all views:)

Re: Sample Code: A Procedure To Drop Views

VolkerBarth — Wed, 24 Feb 2010 08:24:50 GMT

Adding the owner name as a 2nd param (with default "DBA"?) would be nice. E.g. our schemata are usually owned by "dbo" - primarily for historical purposes like compatibility with MS SQL.

Re: Sample Code: A Procedure To Drop Views

Former Member — Wed, 24 Feb 2010 22:05:23 GMT

That's fantastic! I wish we were on 11, but we only just went to 10 last year.