Aw: RE: Null data in not null column

From: Jeffrey Beckstrom <JBECKSTROM_at_gcrta.org>
Date: Tue, 15 Apr 2014 15:30:15 -0400
Message-Id: <534D50870200000B0051F8A5_at_groupwise.gcrta.org>

In your default clause for the table definition, is there a space between the quotes or not. If not, could the default '' be overriding the not null check in the table but not for imp/exp?

>>> "Ingrid Voigt" <giantpanda_at_gmx.net> 4/15/14 3:19 PM >>> Sorry, no fishiness was intended. I ran several versions of the query to check if the entries really are nulls, made a copy-and-paste-error. Here is a new version:

> set null ~
> select oid, anzeige_name from usr_user;

           OID ANZEIGE_NAME

---------- ----------------------------------------
	   223 ~
	   224 ~

But the constraint is said to be enabled and validated:

> select con.constraint_name, con.status, con.validated from dba_constraints con, dba_cons_columns col where

  2    con.owner=col.owner and
  3    con.constraint_name=col.constraint_name and
  4    con.table_name = col.table_name and
  5    col.table_name = 'USR_USER' and
  6    col.column_name = 'ANZEIGE_NAME';
CONSTRAINT_NAME			    STATUS   VALIDATED
------------------------------ -------- -------------
SYS_C0013771				   ENABLED  VALIDATED

Regards
Ingrid Voigt

Gesendet: Dienstag, 15. April 2014 um 20:03 Uhr Von: "Mark W. Farnham" <mwf_at_rsiz.com> An: oratune_at_yahoo.com, howard.latham_at_gmail.com, giantpanda_at_gmx.net, 'ORACLE-L' <oracle-l_at_freelists.org> Betreff: RE: Null data in not null column

Likely David is correct.

If in the sqlplus session reporting the data you preface the query with set null ~
then the columns containing actual nulls will be definitively displayed visually.

also, your query has a column header of length(ANZEIGE_NAME), but that is NOT the query you ran.

Please clear up this fishiness.

mwf

From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of David Fitzjarrell Sent: Tuesday, April 15, 2014 1:28 PM
To: howard.latham_at_gmail.com; giantpanda_at_gmx.net; ORACLE-L Subject: Re: Null data in not null column

SQL> insert into emp(empno) values (""); ERROR:
ORA-01741: illegal zero-length identifier

SQL>
SQL>
SQL>
SQL>
SQL> insert into emp(empno) values ('');
insert into emp(empno) values ('')
							   *

ERROR at line 1:
ORA-01400: cannot insert NULL into ("GRIBNAUT"."EMP"."EMPNO")

SQL> TJ is correct, the NOT NULL constraint was added after the NULL values were entered; it was created NOVALIDATE so it wouldn't fail on creation due to the existing NULL values. It's possible to disable the constraint on the source table before the export then enable it novalidate in the destination database after the table has been imported. Of course you would also need to enable the constraint novalidate in the source database after the export has completed.

David Fitzjarrell
Primary author, "Oracle Exadata Survival Guide"

On Tuesday, April 15, 2014 11:13 AM, "howard.latham_at_gmail.com" <howard.latham_at_gmail.com[howard.latham_at_gmail.com]> wrote:

Set it to ""

• Reply message ----- From: "Ingrid Voigt" <giantpanda_at_gmx.net[giantpanda_at_gmx.net]> To: "oracle-l_at_freelists.org[oracle-l_at_freelists.org]" <oracle-l_at_freelists.org[oracle-l_at_freelists.org]> Subject: Null data in not null column Date: Tue, Apr 15, 2014 4:53 PM

Hi,

one of our customers' databases has a table with a not null column containing empty data. Do you know how this can be set up?

I need to copy the table (via exp/imp) and hit either ORA-01400 (when defining not null before insert) or ORA-02296 (when I insert first and later modify the column).

More details:

Windows 2008 R2
Oracle 11.2.0.3 + Patch 27 (January 2014)

Table definition (more columns left out):

CREATE TABLE USR_USER
(

  OID   	    NUMBER(15) 					 NOT NULL,
  ANZEIGE_NAME  VARCHAR2(40 BYTE)  			 DEFAULT ''				    NOT NULL,

)
TABLESPACE USERS; And the data:

> select oid, anzeige_name, '.'||anzeige_name||'.' from usr_user;

           OID ANZEIGE_NAME LENGTH(ANZEIGE_NAME)

---------- ---------------------------------------- --------------------
	   223
	   224

(more rows left out)

These are not strings consisting of spaces, but really empty ones, i.e. nulls.

Insert into the table without specifying anzeige_name also hits ORA-01400, the condition is active. The corresponding check constraint is enabled and validated.

I'd appreciate help in reproducing this.

Thank you.
Ingrid Voigt

--
http://www.freelists.org/webpage/oracle-l[http://www.freelists.org/webpage/oracle-l]



--
http://www.freelists.org/webpage/oracle-l





.



--
http://www.freelists.org/webpage/oracle-l

Received on Tue Apr 15 2014 - 21:30:15 CEST