RE: Dimension table load - PLSQL question

From: Igor Neyman <ineyman_at_perceptron.com>
Date: Thu, 29 Sep 2005 09:42:15 -0400
Message-ID: <F4C27E77F7A33E4CA98C19A9DC6722A245F8B8@EXCHANGE.corp.perceptron.com>

"when matched" clause is optional, so you should be fine without updates.
As for returning PK, regular "INSERT" has "RETURNING" clause, but I don't see one for "insert" used withing "MERGE". File "enhancement request" with Oracle :)

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From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Ranko Mosic Sent: Thursday, September 29, 2005 9:34 AM To: Igor Neyman
Cc: Paul Drake; ORACLE-L
Subject: Re: Dimension table load - PLSQL question

What about returning key if record exists ? There is no update happening.  

Thanks, rm.  

On 9/29/05, Igor Neyman <ineyman_at_perceptron.com> wrote:

        Does it make a difference: 1 table or 6?          

	MERGE INTO t
	    USING (SELECT(select descr1 from lkp_table1 where cd =
p_cd1) AS v_descr1, 
	                                select descr2 from lkp_table2
where cd = p_cd2) AS v_descr2 , 
	                                .... etc. )from dual) c
	    ON (t.descr1 = c.v_descr1 and t.descr2 = c.v_descr2 and ...
etc)
	    WHEN NOT MATCHED INSERT (t.descr1, t.descr2, ...) 
	        VALUES (c.v_descr1, c.v_descr2, ...)
	 
	Really, no need to react the way, you did...
	
	 
	Igor Neyman
	

	 
________________________________

	From: oracle-l-bounce_at_freelists.org [mailto:

oracle-l-bounce_at_freelists.org <mailto:oracle-l-bounce_at_freelists.org> ] On Behalf Of Ranko Mosic

	Sent: Thursday, September 29, 2005 8:45 AM
	To: Paul Drake
	Cc: ORACLE-L
	Subject: Re: Dimension table load - PLSQL question 
	
	 
	Thanks for very helpful, no patronizing answer. If you've read
more carefully what the problem is
	you'd see that MERGE can't work because it works on one table
upserting another. 
	I have one table being inserted from 6 tables. 
	Thanks genius.
	
	 
	On 9/28/05, Paul Drake <bdbafh_at_gmail.com> wrote: 

		On 9/28/05, Ranko Mosic <ranko.mosic_at_gmail.com > wrote: 
		

			Hi, 
			requirement: 


			- input parameters are codes p_cd1, p_cd2, ...

			- for these codes I get descriptions ( select

descr1 into v_descr1 from                         

                        lkp_table1 where cd = p_cd1; select descr2 into v_descr2 from lkp_table2 where                         

			cd = p_cd2 etc )


			- check if table t has records  where t.descr1 =

v_descr1
			   and t.descr2 = v_descr2 and on and on ....; 


			- if row exists return primary key; 

			- if not then insert. 

			
			What is the best way of doing it ( simplest ) ? 
			
			
			Regards, Ranko.  
			



		Ranko,
		
		"Simplest way" is to solicit opinions without using a
search engine or checking the documentation.
		Its also usually "simplest" to leverage the existing

provided functionality, rather than writing your own routines, error handling, etc.                 

                A search of "oracle 10.1 upsert" in google.com <http://google.com/> + "I'm feeling lucky" produced this for me.

                Perhaps you might get lucky too.                 

                Paul                 

                http://www.psoug.org/reference/merge.html                                  

        MERGE <hint> INTO <table_name>
USING <table_view_or_query>
ON (<condition>)
WHEN MATCHED THEN <update_clause>
WHEN NOT MATCHED THEN <insert_clause>;

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Received on Thu Sep 29 2005 - 08:44:29 CDT