How do I modify a check constraint?

Alter table test modify constraint Constraint_name check(a in ('a','b','c'));
Doesn't seem to work. I tried many things, any help?

Hi,
Why can not disable/drop the constraint and recreate new constraint with requirements?
1. alter table test modify/drop a number drop constraints x;
2. alter table test add constraint b check(x in(1,2));
With regards,
Boby Jose Thekkanath,
Dharma Computers(P) Ltd.
Bangalore-India.
www.dharma.com

Similar Messages

How can i modify the check constraint in the table

How can i modify the check constraint in the table. This table containts check constraint, condition is code_value between 1 and 4. codevalue is column name.
Please suggest me.

Go to tahiti.oracle.com, pick version browse reference manual and see the alter table statement
Also read the goal of this forum.
Your question is more appropriate to Database general forum
General Database Discussions
Gints Plivna
http://www.gplivna.eu

How to modify a CHECK constraint.

We need to modify a check constraint to allow new values. Is there a way we can modify the existing constraint or should we drop and recreate including new values.
Example:
We have a table SLOG and SNO is a column accepting numeric values. Currently there is a constraint on this column so that it accepts values of 1,2,3,4. Now I want to insert a value of 5 to this column. Since there is a CHECK constraint on this column it prevents the value of 5.
So the constraint needs to be modified. Is there a way we can modify the constraint using a DDL command (like ALTER TABLE) or should I drop and re create the constraint.
Thanks in advance.
Balaji

Hello,
Is there a way we can modify the constraint using a DDL command You can just MODIFY the state of your constraint ( constraint_state ).
So, if you want to modify the definition of your constraint you have to drop and create the CHECK constraint with its new definition.
Sorry, when I was writing my post, I didn't see the question was already answered.
Best regards,
Jean-Valentin
Edited by: Lubiez Jean-Valentin on Jul 11, 2010 11:04 AM

How can I implement a check constraint like this

A column can have this values: first 3 letters can be �ing� �fig� �erd� then it can either have �1,2,4,5� and then 3 more numbers.
Like this: ing1003 or fig2432 etc.
I have tried this:
columnName LIKE �[ing-fig-erd][1-2-4-5][0-9][0-9][0-9]�
But it doesn�t work. I have been looking around and haven�t found anything that can help me with this.
Anyone got any suggesting?
Cheers
envida

CHECK(code LIKE '[ing,fig,erd,][1,2,3,4,5][0-9][0-9][0-9]'))This is a regular expression. Oracle database does not yet support regular expressoions (10g will). So what it is actually doing is apllying the whole string as a literal. Because there are no wild cards, any row where code literally does not equal '[ing,fig,erd,][1,2,3,4,5][0-9][0-9][0-9]' will fail i.e. all of them.
If you really want to use regular expressions either have a look at the PL/SQL package OWA_PATTERN or consider importing the Java Regexp package and implementing some Java Stored Procedures. Alternatively you can could cook up something using translate or replace.
Cheers, APC

How to use external functions in check constraints

I created my own function:
create or replace
function if_num_get_num (inval in varchar2)
return number
is
dummy number;
Begin
dummy := to_number(inval);
return dummy;
exception
when others then return null;
end;Can I use it in table check constraint?
When I use standard function INSTR everything is OK.
ALTER TABLE A_S
ADD CONSTRAINT A_S_CHK1 CHECK
(INSTR(NAZWA_ZA, ':') > 0)
ENABLE;but when I try to create it with my function:
ALTER TABLE A_S
ADD CONSTRAINT A_S_CHK1 CHECK
(IF_NUM_GET_NUM(INSTR(NAZWA_ZA, ':')) > 0)
ENABLE;I get a message "Invalid column IF_NUM_GET_NUM"

Read the restrictions.
>
Restrictions on CHECK Constraints
A CHECK constraint requires that a condition be true or unknown for every row of the table. If a statement causes the condition to evaluate to false, then the statement is rolled back. The condition of a CHECK constraint has these limitations:
* The condition must be a boolean expression that can be evaluated using the values in the row being inserted or updated.
* The condition cannot contain subqueries or sequences.
* The condition cannot include the SYSDATE, UID, USER, or USERENV SQL functions.
* The condition cannot contain the pseudocolumns LEVEL or ROWNUM.
* The condition cannot contain the PRIOR operator.
** The condition cannot contain a user-defined function.*
>
http://download.oracle.com/docs/cd/E11882_01/appdev.112/e17125/adfns_constraints.htm#ADFNS282

How to add a check constraint to a column to accept values in the following format: "L214"?

All I could come up with is this:
check (column_name like '____');
But That doesn't enforce the first character to be a letter and the other three to be numbers.

Hi,
"PS: Why the f***you have so many subforums here?"
Because it is much easier to seperate and let experts answer to specific details of SQL Server. SQL Server is not a small product as many people think ;-)
Here is the solution:
CREATe table SampleA (A INT, B VARCHAR(MAX) CHECK (B LIKE '[A-Z][0-9][0-9][0-9]'))
INSERT INTO SampleA VALUES (1,'0000')
Msg 547, Level 16, State 0, Line 2
The INSERT statement conflicted with the CHECK constraint "CK__SampleA__B__38B96646". The conflict occurred in database "master", table "dbo.SampleA", column 'B'.
The statement has been terminated.
INSERT INTO SampleA VALUES (1,'L000')
--(1 row(s) affected)
INSERT INTO SampleA VALUES (1,'L0001')
Msg 547, Level 16, State 0, Line 2
The INSERT statement conflicted with the CHECK constraint "CK__SampleA__B__38B96646". The conflict occurred in database "master", table "dbo.SampleA", column 'B'.
The statement has been terminated.
-Jens
Jens K. Suessmeyer http://blogs.msdn.com/Jenss

How to create this check constraint

create table emplt
( emplt_pk number,
indvl_pk number,
start_dt date,
end_dt date,
lct_fl char(1),
sup_fl char(1),
br_pk number,
nro_pk number,
default_fl char(1) default 'N' );
INSERT INTO emplt
values(
1001, 101, to_date('01-01-2005', 'MM-DD-YYYY' ), NULL, 'Y','N',123,NULL,NULL );
INSERT INTO emplt
values(
1002, 101, to_date('02-01-2005', 'MM-DD-YYYY' ), NULL, 'Y','N',NULL,0001,NULL );
INSERT INTO emplt
values(
1003, 102, to_date('02-01-2005', 'MM-DD-YYYY' ), NULL, 'Y','N',NULL,0001,NULL );
Is it possible to create a check constraint on this table that enforces that for a given indvl_pk, br_pk and nro_pk
there is only one row with dflt_fl = 'Y'?
Thanks in advance!

Say,
SQL> create unique index empli_ui on emplt(case default_fl when 'Y' then indvl_pk end,
2 case default_fl when 'Y' then br_pk end,
3 case default_fl when 'Y' then nro_pk end
4 )
5 /
&nbsp
Index created.
&nbsp
SQL> insert into emplt (indvl_pk,br_pk,nro_pk,default_fl)
2 values(1,2,3,'J');
&nbsp
1 row created.
&nbsp
SQL> insert into emplt (indvl_pk,br_pk,nro_pk,default_fl)
2 values(1,2,3,'J');
&nbsp
1 row created.
&nbsp
SQL> insert into emplt (indvl_pk,br_pk,nro_pk,default_fl)
2 values(3,2,1,'A');
&nbsp
1 row created.
&nbsp
SQL>
SQL> insert into emplt (indvl_pk,br_pk,nro_pk,default_fl)
2 values(3,2,1,'A');
&nbsp
1 row created.
&nbsp
SQL> insert into emplt (indvl_pk,br_pk,nro_pk,default_fl)
2 values(3,2,1,'Y');
&nbsp
1 row created.
&nbsp
SQL>
SQL> insert into emplt (indvl_pk,br_pk,nro_pk,default_fl)
2 values(3,2,1,'Y');
insert into emplt (indvl_pk,br_pk,nro_pk,default_fl)
ERROR at line 1:
ORA-00001: unique constraint (SCOTT.EMPLI_UI) violated
&nbsp
SQL> insert into emplt (indvl_pk,br_pk,nro_pk,default_fl)
2 values(1,2,3,'Y');
&nbsp
1 row created.
&nbsp
SQL> insert into emplt (indvl_pk,br_pk,nro_pk,default_fl)
2 values(1,2,3,'Y');
insert into emplt (indvl_pk,br_pk,nro_pk,default_fl)
ERROR at line 1:
ORA-00001: unique constraint (SCOTT.EMPLI_UI) violatedRgds.

How to Disable check constraint in cronacle

Hi All,
We found that one job failed in cronacle with the following error
*ORA-20800: JCS-02138: problem with parameter "PRINT_BANNERPAGE"
SAP recommended the soultion saying
Disable the "Check Constraints" that are being used in the scripts currently in Cronacle or apply some patch.So we want to explore the first option i.e check constraint
Can any one help me in Regarding the check constraints.
Thanks in advance
shylaja

Hi,
Scripts can have check constraints and reference contraints, you will find these under the script properties when you edit the script.
I would set the constraint to optional, meaning that you still have the dropdown available but it no longer complains if it does not like the chosen value.
Regards,
Anton.

DB Diagram: Modality Difference between NOT NULL and check constraint

Hi,
I am using jdev 11g (11.1.1.10) I am trying to create a db diagram from two tables. I have a FK that is NOT NULL (defined on the column). When i try to display these two tables modality, it does not show up in the diagram. I noticed that there are two ways NOT null can be defined on a table (right click on the db object to edit it; a) under column definitions there is a check box for not null, b) there is a check constraint that one can add to do not null.
I am confused and was wondering whether I must I have check constraints on the database in order to display modality (optional versus mandatory). Logically speaking it does not make any sense though.

Hi Susan,
Thanks for your email. I understand that in order to show modality under
UML notation, one must define a COLUMN being NOT NULL instead of defining a check constraint.
I still do not understand how modality (optional versus mandatory) is shown in ERD notation in JDev. I tried flipping ERD/UML notations and made sure icons for tables were showing, but no MODALITY is shown in ERD notation ( an '0" icon or a "|" icon for optional and mandatory). Is it the solid line versus dotted line in the ERD diagram? I am confused because generally under Crawfoot ERD notation '0" icon or a "|" icon is shown for modality.
Modality gets picked up in jdev diagram when COLUMN not null is specified and UML notation is used
ALTER TABLE DETAILAJ MODIFY EMPID not null;
Modality does not get picked up in jdev db diagram when check constraint is specified and UML notation is used
ALTER TABLE DETAILAJ
ADD CONSTRAINT CK_NN_DETAILAJ__EMPID CHECK(EMPID IS NOT NULL) ;
Another question i have related to the matter mentioned above is as follows. Since I want to see modality in db diagram, it follows that I must define a column as not null instead of a check constraint. I must also use NO VALIDATE on NOT NULL column because i have prior data that does not meet the new restriction. I noticed that if i use the following syntax to define a NOT NULL column, two things happen.
a) A constraint is defined as not null automatically and a system generated name is given to the constraint.
b) DB diagram in Jdev does not show the modality.
My question is whether there is a way to see modality in this case.
alter table DETAILAJ
MODIFY EMPID NOT NULL ENABLE NOVALIDATE ;
Edited by: user11219846 on Nov 19, 2009 11:07 AM

How to use modify command?

i want to modify table t_bseg which is used n BTE interface_00001050
i want to modify only 1 specific line, how can i modify this line without using index because i get 0 when i use sy-tabix?
( i want to modify this line using the table keys ) .
thanks

Hi,
MODIFY TABLE <itab> FROM <wa> [TRANSPORTING <f1> <f 2> ...].
Check this link:
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3ac8358411d1829f0000e829fbfe/content.htm
Regards
Adil

Primary key and relevant not null check constraints....

Hi ,
There are some constraints of primary key type and not null check constraints on columns which constitute each primary key....
Should I/Do I have to drop them....????
Do they burden the db at the time of data validation....????
Thanks...
Sim

Hi,
>>There are some constraints of primary key type and not null check constraints on columns which constitute each primary key..
In fact, a column that constitutes a primary key, by default cannot accept NULL values. In this case, defines a PK column as NOT NULL would not be necessary.
LEGATTI@ORACLE10> create table x (id number constraint pk_x primary key);
Table created.
LEGATTI@ORACLE10> desc x
Name                  Null?    Type
ID                    NOT NULL NUMBER
LEGATTI@ORACLE10> select constraint_name,constraint_type,table_name,search_condition from user_constraints where table_name='X';
CONSTRAINT_NAME                C TABLE_NAME      SEARCH_CONDITION
PK_X                           P X
LEGATTI@ORACLE10> create table y (id number not null constraint pk_y primary key);
Table created.
LEGATTI@ORACLE10> desc y
Name                  Null?    Type
ID                   NOT NULL NUMBER
LEGATTI@ORACLE10> select constraint_name,constraint_type,table_name,search_condition from user_constraints where table_name='Y';
CONSTRAINT_NAME                C TABLE_NAME      SEARCH_CONDITION
SYS_C006327381 C Y "ID" IS NOT NULL
PK_Y                           P Y
LEGATTI@ORACLE10> alter table y drop constraint SYS_C006327381;
Table altered.
LEGATTI@ORACLE10> desc y
Name                                      Null?    Type
ID                                        NOT NULL NUMBER
LEGATTI@ORACLE10> insert into y values (NULL);
insert into y values (NULL)
ERROR at line 1:
ORA-01400: cannot insert NULL into ("LEGATTI"."Y"."ID")
LEGATTI@ORACLE10> insert into y values (1);
1 row created.
LEGATTI@ORACLE10> insert into y values (1);
insert into y values (1)
ERROR at line 1:
ORA-00001: unique constraint (LEGATTI.PK_Y) violated
>>Should I/Do I have to drop them....????
I don't see any problem, otherwise, drop the NOT NULL constraint is the same with alter the column table like below:
LEGATTI@ORACLE10> create table z (id number not null constraint pk_z primary key);
Table created.
LEGATTI@ORACLE10> select constraint_name,constraint_type,table_name,search_condition from user_constraints where table_name='Z';
CONSTRAINT_NAME                C TABLE_NAME                     SEARCH_CONDITION
SYS_C006328420 C Z "ID" IS NOT NULL
PK_Z                           P Z
LEGATTI@ORACLE10> desc z
Name                                      Null?    Type
ID                                        NOT NULL NUMBER
LEGATTI@ORACLE10> alter table z modify id NULL;
Table altered.
LEGATTI@ORACLE10> select constraint_name,constraint_type,table_name,search_condition from user_constraints where table_name='Z';
CONSTRAINT_NAME                C TABLE_NAME                     SEARCH_CONDITION
PK_Z                           P Z
LEGATTI@ORACLE10> desc z
Name                                      Null?    Type
ID                                        NOT NULL NUMBERCheers
Legatti

How do you modify the web.xml to lock down the pages from a user role

how do you modify the web.xml to lock down the pages from a user role

I'll make a stab at your question:
The following is an example of where a URL is protected within a web.xml deployment descriptor. In this example, the URL /protectedA within the application is protected:

<security-constraint>
<web-resource-collection>
<web-resource-name>protectedA</web-resource-name>
<url-pattern>/protectedA</url-pattern>
</web-resource-collection>

<auth-constraint>
<role-name>sr_developer</role-name>
</auth-constraint>
</security-constraint>
Sun's explaination here:
http://java.sun.com/j2ee/1.4/docs/tutorial/doc/Security4.html

How to print the Actual Check on 1st Page if line items are more for F110_p

Hi,
How to print the Actual Check on 1st page if the line items are more in F110_PRENUM_CHCK script. The standard script is printing at the last page of line items.
I tried using
IF &PAGE& EQ '1 '
/E 545 --> text element
ENDIF
but it is of no use.
Please let me know if anyone knows. Thanks in Advance.

Hi Krishna,
I guess, there is no other possible way to acheive this without modifying the standard driver program. Why because? in you driver program you check window will be called only on the last page... but before you change your driver program give a try like shown below....
Not sure, but give a try... In the first page you will be printing some void check try to replace the code inside the text element of void check with original check and make all the check void... note: in this text element, be sure you write two conditions...
IF &PAGE& = 1.
**PRint all check values..
ELSE.
***Print void values
ENDIF.
Close the thread if your question is answered.
Regards,
Sairam

How to find content of a constraint etc.

Hi,
select constraint_name
from user_constraints
where table_name = 'EMP';
shows to two constraints for the given table of EMP. Now, how to find CONTENT of each of these two constraints?
Secondly, how to find if a particular column is nullable (programmatically, not from DBA tool set)? e.g. EMP.deptno
Thirdly, why did I get the err msg of "inserted value too large for column"
when executing the following command for data insertion to EMP as user, scott
create SEQUENCE emp_sequence
start with 8000 increment by 10;
insert into EMP values (emp_sequence.NEXTVAL,'JOE','Researcher',null,null,null,null,null);
Thanks a bunch.

Thirdly, why did I get the err msg of "inserted value too large for column"Er, do the math...
SQL> conn scott/tiger
Connected.
SQL> desc emp
Name                                      Null?    Type
EMPNO                                     NOT NULL NUMBER(4)
ENAME                                              VARCHAR2(10)
JOB                                                VARCHAR2(9)
MGR                                                NUMBER(4)
HIREDATE                                           DATE
SAL                                                NUMBER(7,2)
COMM                                               NUMBER(7,2)
DEPTNO                                             NUMBER(2)
SQL> select length('researcher') from dual
2 /
LENGTH('RESEARCHER')
                  10
SQL>
Secondly, how to find if a particular column is nullable (programmatically, not from DBA tool set)Don't like the sound of this, smells of dynamic coding. Anybody who can't figure out why they can't create an EMP record for a researcher probably ought not to be tangling with dynamic SQL just yet.
Now, how to find CONTENT of each of these two constraints?The CONSTRAINT_TYPE tells you the sort of constraint: P=PRIMARY KEY, U=UNIQUE, R=FOREIGN KEY and C=CHECK. Only Check constraints have any content as such and you'll find that in the SEARCH_CONDITION. Note that this is a LONG column, so you may need need to SET LONG 5000 to see it in SQL*Plus.
Cheers, APC
P.S. In future please refrain from bundling unrelated questions into a single post. There is no charge for posting and it avoids the threads getting long and hard to follow.

How can i make a CHECK in an ALTER table, to compare 2 Variables of TWO different tab

I have 3 tables:
EVALUATION (No_expert, No_article)
EXPERT (No_expert, origine, name)
AUTHOR_ARTICLE (No_Article, Code_author)
AUTHOR (Code_author, Name, Original)
and my question is: How can i make a check to refuse each time an EXPERT ADDED to the EVALUATION table. If this one is an AUTHOR, in other words, the EVALUATION.No_expert must <> than AUTHOR.Code_author.
This is what i did but it doesn't work:
ALTER TABLE EVALUATION ADD CONSTRAINT No_expert
CHECK (EVALUATION.No_expert <> AUTHOR_ARTICLE.Code_author);
thank a lot
luong.

See Disabling (graying-out) Form Fields by Thom Parker. It covers both Acrobat and LiveCycle forms.

How do I modify a check constraint?

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