Error when the concatenation of CLOB using conversion implicit to_char
HelloPlease look at the code below (Oracle 11.1.0.7.0):
DECLARE
c CLOB;
BEGIN
FOR i IN 1..10
LOOP
-- Please uncomment ONE of the lines below
c := c || LPAD('x', 8000, 'z') || i; -- raises error ora-06502
--c := c || (LPAD('x', 8000, 'z') || i); -- works
--c := c || LPAD('x', 8000, 'z') || to_char(i); -- works
END LOOP;
END;
OK, making use of implicit type conversion may not be the best thing to do, but just out of curiosity, is there any explanation for this error to occur?It seems that, when an implicit conversion is involved without the help of hooks, Oracle tries to convert all in varchar2 before concatenate in the clob, which causes the error.
Thank you
Luis
Hello
>
# 6.1, we have a clob and a varchar2, as in #2; Why Oracle has decided to convert the clob in varchar2 as you say, and not vice versa as in #3?
>
# 5, we have clob and number at the beginning. In order to evaluate the expression oracle requires that two variables was of the same type.
As the implicit conversion there is no number-> clob
but there are several-> varchar2 and clob-> varchar2 oracle choose this one.
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the solution to the problem really seems to check 'non transactional connections' (with nothing to do in the code of the application) in the GlassFish connection pool configuration.
I did a lot of tests: commit, rollback and save points works like movement.
See you later for another thrilling adventure!
Thank you
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)
)
I tried to replace the host name and IP address, I still got the same error. The host name of the server database and IP entry does not exist in the file "/ etc/hosts. Could this be the cause? I can't edit the file "/ etc/hosts" and I couldn't convince the sys-admin to add the hostname of Server DB and IP entry to this file.
Clues please?
Best regards
user130038 wrote:
Hello
Env: Oracle 11 2 Client (11.2.0.1) on Oracle Linux 5.8 GR 64 bit
DB server: Oracle 11 g 2 (11.2.0.3.6) on Oracle Linux 6.2 64bits
I have installed Oracle 11 GR 2 client on a server and created the tnsnames.ora with required entry.
When I try to connect to the databases on the server of remote database using the suite in two ways, one of them give me error "ORA-12545". Do not know why.
[oracle@server ~] $ sqlplus scott/tiger@proddb01
SQL * more: Production of release 11.2.0.1.0 game Apr 10 12:24:58 2014
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to:
Oracle Database 11 g Enterprise Edition Release 11.2.0.3.0 - 64 bit Production
With partitioning, OLAP, Data Mining and Real Application Testing options
SQL > exit
Disconnected from the database to Oracle 11 g Enterprise Edition Release 11.2.0.3.0 - 64 bit Production
With partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@server ~] $ sqlplus
SQL * more: Production of release 11.2.0.1.0 game Apr 10 12:25:04 2014
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Enter the user name: scott
Enter the password:
ERROR:
ORA-12545: Connect failed because target host or object does not exist
Enter the user name:
Here's my env:
[oracle@server ~] $ echo $ORACLE_SID
PRODRD01
[oracle@server ~] $ echo $ORACLE_HOME
/opt/Oracle/app/product/11.2.0/Client_1
[oracle@server ~] $
Input TNS is:
PRODRD01 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = server.whatever.com) (PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = PRODRD01)
)
)
I tried to replace the host name and IP address, I still got the same error. The host name of the server database and IP entry does not exist in the file "/ etc/hosts. Could this be the cause? I can't edit the file "/ etc/hosts" and I couldn't convince the sys-admin to add the hostname of Server DB and IP entry to this file.
Clues please?
Best regards
When '@proddb01' is not used, then sqlplus can only connect to a local database, & there is no local database on the client system
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