Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.
Course Of The Month
7 days, 10 hours left to enrollBecome a Premium Member and unlock a new, free course in leading technologies each month.
Solved
Oracle 9i Merge Command Problem
Posted on 2004-08-10
Hi I'm trying to use the merge command but have encountered a problem which does not seem to make sense. I am running the following code:
merge into dest
using src
on (dest.client_number = src.nclient)
when matched then
update set
dest.client_number = src.nclient
when not matched then
insert (dest.client_number)
values
(src.nclient)
when trying to run it I get the following error:
ORA-00904: "DEST"."CLIENT_NUMBER": invalid identifier
Now this table exists and the user I am using is the owner of the table so I can't understand what's wrong. Any ideas?
The version of Oracle I am using is 9.2.0.1.0.
Thanks
merge into dest
using src
on (dest.client_number = src.nclient)
when matched then
update set
dest.client_number = src.nclient
when not matched then
insert (dest.client_number)
values
(src.nclient)
when trying to run it I get the following error:
ORA-00904: "DEST"."CLIENT_NUMBER": invalid identifier
Now this table exists and the user I am using is the owner of the table so I can't understand what's wrong. Any ideas?
The version of Oracle I am using is 9.2.0.1.0.
Thanks
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
2
- +1
5 Comments
Active today
The cause is that you cannot update a column that has been referenced in the ON condition clause.
Restrictions on the update clause:
- You cannot specify DEFAULT when updating a view.
- You cannot update a column that has been referenced in the ON condition clause.
- You cannot update the same row of the target table multiple times in the same MERGE statement.
Prerequisites:
- You must have INSERT and UPDATE object privileges on the target table
and SELECT privilege on the source table.
Restrictions on the update clause:
- You cannot specify DEFAULT when updating a view.
- You cannot update a column that has been referenced in the ON condition clause.
- You cannot update the same row of the target table multiple times in the same MERGE statement.
Prerequisites:
- You must have INSERT and UPDATE object privileges on the target table
and SELECT privilege on the source table.
It appears to be an undocumented restriction that you cannot UPDATE any column
you are MERGING on.
Here is example from http://asktom.oracle.com/pls/ask/f?p=4950:8:12923460400259688987::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:5318183934935,
MERGE INTO newemp n1
USING external_table e1
ON ( n1.empno = e1.empno )
WHEN MATCHED THEN UPDATE
SET n1.empno = e1.empno,
n1.ename = e1.ename,
n1.job = e1.job,
n1.mgr = e1.mgr,
n1.hiredate = e1.hiredate,
n1.sal = e1.sal,
n1.comm = e1.comm,
n1.deptno = e1.deptno
WHEN NOT MATCHED THEN
INSERT ( empno, ename, job, mgr, hiredate, sal, comm, deptno )
values ( e1.empno,
e1.ename,
e1.job,
e1.mgr,
e1.hiredate,
e1.sal,
e1.comm,
e1.deptno )
/
ON ( n1.empno = e1.empno )
*
ERROR at line 3:
ORA-00904: "N1"."EMPNO": invalid identifier
ops$tkyte@ORA920.US.ORACLE
2 USING external_table e1
3 ON ( n1.empno = e1.empno )
4 WHEN MATCHED THEN UPDATE
5 SET -- n1.empno = e1.empno,
6 n1.ename = e1.ename,
7 n1.job = e1.job,
8 n1.mgr = e1.mgr,
9 n1.hiredate = e1.hiredate,
10 n1.sal = e1.sal,
11 n1.comm = e1.comm,
12 n1.deptno = e1.deptno
13 WHEN NOT MATCHED THEN
14 INSERT ( empno, ename, job, mgr, hiredate, sal, comm, deptno )
15 values ( e1.empno,
16 e1.ename,
17 e1.job,
18 e1.mgr,
19 e1.hiredate,
20 e1.sal,
21 e1.comm,
22 e1.deptno )
23 /
you are MERGING on.
Here is example from http://asktom.oracle.com/pls/ask/f?p=4950:8:12923460400259688987::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:5318183934935,
MERGE INTO newemp n1
USING external_table e1
ON ( n1.empno = e1.empno )
WHEN MATCHED THEN UPDATE
SET n1.empno = e1.empno,
n1.ename = e1.ename,
n1.job = e1.job,
n1.mgr = e1.mgr,
n1.hiredate = e1.hiredate,
n1.sal = e1.sal,
n1.comm = e1.comm,
n1.deptno = e1.deptno
WHEN NOT MATCHED THEN
INSERT ( empno, ename, job, mgr, hiredate, sal, comm, deptno )
values ( e1.empno,
e1.ename,
e1.job,
e1.mgr,
e1.hiredate,
e1.sal,
e1.comm,
e1.deptno )
/
ON ( n1.empno = e1.empno )
*
ERROR at line 3:
ORA-00904: "N1"."EMPNO": invalid identifier
ops$tkyte@ORA920.US.ORACLE
2 USING external_table e1
3 ON ( n1.empno = e1.empno )
4 WHEN MATCHED THEN UPDATE
5 SET -- n1.empno = e1.empno,
6 n1.ename = e1.ename,
7 n1.job = e1.job,
8 n1.mgr = e1.mgr,
9 n1.hiredate = e1.hiredate,
10 n1.sal = e1.sal,
11 n1.comm = e1.comm,
12 n1.deptno = e1.deptno
13 WHEN NOT MATCHED THEN
14 INSERT ( empno, ename, job, mgr, hiredate, sal, comm, deptno )
15 values ( e1.empno,
16 e1.ename,
17 e1.job,
18 e1.mgr,
19 e1.hiredate,
20 e1.sal,
21 e1.comm,
22 e1.deptno )
23 /
Active today
This is well documented prerequisite.
Also in 9.1 there is a bug, but it is known and you also use 9.2. So I think that we encounter the cause.
Also in 9.1 there is a bug, but it is known and you also use 9.2. So I think that we encounter the cause.
Featured Post
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Note: this article covers simple compression. Oracle introduced in version 11g release 2 a new feature called Advanced Compression which is not covered here.
General principle of Oracle compression
Oracle compression is a way of reducing the d…
From implementing a password expiration date, to datatype conversions and file export options, these are some useful settings I've found in Jasper Server.
This video shows information on the Oracle Data Dictionary, starting with the Oracle documentation, explaining the different types of Data Dictionary views available by group and permissions as well as giving examples on how to retrieve data from th…
This video shows how to recover a database from a user managed backup
Suggested Courses
Course of the Month7 days, 10 hours left to enroll
Earn Certification
Certified Information Systems Auditor (CISA)
$99.00$89.10
729 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.