Re: best way to parameterize an "in (...)" part of query?
Date: Sun, 01 Mar 2009 11:42:00 +0100
On 01.03.2009 10:23, Maxim Demenko wrote:
> mh_at_pixar.com schrieb:
>> I have two relatively large procedures that differ only >> by the contents of an "in (...)" clause, e.g. >> >> create proc1 as >> ... >> select foo from bar where x in ('a','b') >> ... >> >> create proc2 as >> ... >> select foo from bar where x in ('x','y') >> ... >> >> I would like to parameterize this, so that proc1 and proc2 can >> call a common subroutine, and pass in the "in" list. >> >> create proc1 as ... baseproc(['a','b']) -- some representation >> of a,b >> create proc2 as ... baseproc(['x','y']) -- some representation >> of x,y >> >> create baseproc(INLIST SOMETYPE) >> ... >> select foo from bar where x in INLIST >> ... >> >> How can I parameterize this? Is there an appropriate type?
> I have serious doubts the best way exists, but there are many
> alternatives which you can implement. Besides that, the question you ask
> was very often discussed ( keyword: dynamic in list) here or at AskTom.
> Here are some approaches:
> 1) select foo from bar where instr(','||INLIST||',',','||x||',') > 0
> 2) select foo from bar where x in ( select
> from dual
> connect by regexp_substr(INLIST,'(^|,)(.*)(,|$)','\2',level,1)
> is not null)
Another option: create a table type and use a query roughly like
select foo from bar where x in ( select column_value from table(array) )
> But, as i mentioned already, this question is probably asked as often as
> about pivot tables, so if you start to search, you'll find dozens of
robert Received on Sun Mar 01 2009 - 04:42:00 CST