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Oracle Unique Index Vs Unique Constraint


Output a googol copies of a string Dozens of earthworms came on my terrace and died there Every polynomial with real coefficients is the sum of cubes of three polynomials SXA own function CREATE OR REPLACE FUNCTION f (c_in IN TIMESTAMP WITH TIME ZONE) RETURN TIMESTAMP IS BEGIN RETURN SYS_EXTRACT_UTC(c_in); END f; / ALTER TABLE t ADD CONSTRAINT c_u UNIQUE (f(c)); -- Related 2rebuild indexes oracle 10G122Why are Oracle table/column/index names limited to 30 characters?3Oracle Unique Indexes1Perfomance issues just on production database0General error: 1 OCIStmtExecute: ORA-00001: unique constraint (HR.SYS_C004023) violated?6Oracle Unique Constraint with Asked: March 18, 2005 - 7:58 am UTC Answered by: Tom Kyte � Last updated: November 01, 2013 - 9:30 pm UTC Category: Database � Version: 10g Whilst you are here, his comment is here

ops$tkyte%ORA10GR2> ops$tkyte%ORA10GR2> select x, sys_extract_utc(x) from t; X --------------------------------------------------------------------------- SYS_EXTRACT_UTC(X) --------------------------------------------------------------------------- 01-JAN-09 AM +00:00 01-JAN-09 AM 01-JAN-09 AM +01:00 01-JAN-09 AM ops$tkyte%ORA10GR2> ops$tkyte%ORA10GR2> create unique index t_unique A unique constraint is enforced by an index though it is possible (and sometimes necessary) to enforce a unique constraint using a non-unique index. and then recreated it again. –Pavel Kucera Feb 11 at 7:00 add a comment| 2 Answers 2 active oldest votes up vote 0 down vote The error message tells you there's Built with love using Oracle Application Express 5. http://stackoverflow.com/questions/7521817/oracle-unique-constraint-and-unique-index-question

Oracle Unique Index Vs Unique Constraint

Output from sp_helpindex publishers after we've created a unique index. But it is not quite the same because there is no constraint. Security Vulnerability Updates About CUBRID Dev Release History Release Policy Contact Downloads CUBRID Engine CUBRID Tools CUBRID Manager CUBRID Web Manager CUBRID Query Browser CUBRID Migration Toolkit CUBRID Windows Downloader CUBRID Oracle PostersOracle Books Oracle Scripts Ion Excel-DB Don Burleson Blog

ORA-00001: unique constraint (string.string) violated tips Oracle Error

Upon truncating MTL_REVISIONS_INTERFACE will take care of ORA-00001 by using the instructions below: Create table backup_ as select * from MTL_REVISIONS_INTERFACE Truncate table MTL_REVISIONS_INTERFACE Resubmit item for item import Command :1 CREATE INDEX stsc.xindex01 ON scott.temp (x) NOLOGGING TABLESPACE POINDEX PARALLEL (DEGREE 32); Command :2 CREATE UNIQUE INDEX stsc.xindex02 ON scott.temp ( a,b,c,d,e,f,g,h ) NOLOGGING TABLESPACE POINDEX PARALLEL (DEGREE 32); An index is visible in USER_INDEXES (or ALL_INDEXES or DBA_INDEXES). Ora 00001 Unique Constraint Violated Index Why cast an A-lister for Groot?

Confirmation There's more confirmation of this conclusion by running the following: exec sp_helpconstraint publishers In the Table 2 output, I've abbreviated the results a bit, leaving off the status_for_replication and constraint_keys Ora-00001 Unique Constraint Violated In Oracle There are many articles that explain why it's possible to have a unique constraint without unique index; that is clear and makes perfect sense. AUTO_INCREMENT fields are only updated if they are not specified in INSERT statements or if they are given the null value when they are specified.Let's say your "foo" table has a Alternatively, you can define UNIQUE integrity constraints on the desired columns.

I too - occasionally - take the weekend off. Ora-00001 Unique Constraint (constraint_name) Violated Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. SYS_EXTRACT_UTC ALTER TABLE t ADD CONSTRAINT c_u UNIQUE (SYS_EXTRACT_UTC(c)); -- ORA-00904: : invalid identifier 2. Regards.

  1. What are the large round dark "holes" in this NASA Hubble image of the Crab Nebula?
  2. Regards HJR > Greetings, > Michael > Received on Tue Nov 16 2004 - 14:06:24 CST This message: [ Message body ] Next message: Jim Cheng: "Re: Install both Oracle 8i
  3. SQL> select * from user_ind_columns where table_name 2 = 'AST_USR_ROL'; INDEX_NAME TABLE_NAME ------------------------------ ------------------------------ COLUMN_NAME ------------------------------------------------------------------------------------------------------------------------ COLUMN_POSITION COLUMN_LENGTH CHAR_LENGTH DESC --------------- ------------- ----------- ---- PKAST AST_PTY USER_ID 1 22 0 ASC
  4. Here, it is explained that using a trigger method might help avoid ORA-00001 in that it does not allow duplicate primary keys.
  5. When I declare the PK constraint on a surrogate, Oracle does indeed create an index "behind the scenes" but the only DDL I issue will be to create the PK, I
  6. so, this isn't the database throwing an error, this must be something in the logic of the webservice that you coded.
  7. Burleson Consulting The Oracle of Database Support Oracle Performance Tuning Remote DBA Services Copyright © 1996 - 2016 All rights reserved by Burleson Oracle is the registered trademark of
  8. ALTER TABLE dbo.titleauthor NOCHECK CONSTRAINT FK__titleauth__au_id__0519C6AF (Modify this syntax to disable a check constraint.) So now it's just a question of trying the same for our unique constraint: ALTER TABLE publishers

Ora-00001 Unique Constraint Violated In Oracle

ops$tkyte%ORA10GR2> create UNIQUE index i_created_this on t(x); Index created. http://www.cryer.co.uk/brian/oracle/ORA00001.htm We don't care if you insert null values into columns that allow for nulls - regardless of the existence of a constraint. Oracle Unique Index Vs Unique Constraint If you could, that would make a unique constraint something more than just a unique index. Oracle Create Unique Constraint Followup May 10, 2013 - 12:47 pm UTC well, that isn't one of our error messages.

ops$tkyte%ORA11GR2> create table t ( a int not null, b int, c int, d int, e int not null, f int not null, g int not null, h int not null this content SQL> alter table e add constraint epk primary key(empno) deferrable; Table altered. [Same table as before, but a DEFERRABLE -though not actually deferred- constraint. Apart from uniquely identifying a row, what is the connection between table data and a meaningless surrogate key? In summary, we can safely conclude that there's no practical difference between a unique constraint and a unique index other than the fact that the unique constraint is also listed as Java.sql.sqlintegrityconstraintviolationexception: Ora-00001: Unique Constraint Violated

create table t (c timestamp with time zone); create unique index t_ui on t(c); insert into t values(timestamp'2009-01-01 00:00:00+00:00'); insert into t values(timestamp'2009-01-01 00:00:00+00:00'); -- ORA-00001 Unique constraint (USER.T_UI) violated drop SELECT MAX(foo_id)+1 from foo; ALTER TABLE foo AUTO_INCREMENT = 10; I want to « Unable to Resolve Host Update / Delete Operations Restriction Error » Please enable JavaScript to view the hopefully, you do not use "UID" in real life.... http://fullflash.net/unique-constraint/unique-constraint-violated-oracle.html Now let's try our test again: SELECT ObjectProperty(object_id('uqc_pub_name'), 'CnstIsDisabled') It still returns a 0.

If I 'create unique index on emp(empno)', that does NOT mean I suddenly have a unique or primary key constraint on the table. Unique Constraint Violated During Update Or use DBA_INDEXES to check which type of constraint has been created. Resolution The option(s) to resolve this Oracle error are: Option #1 Drop the unique constraint.

is that true, and does that mean a unique constraint could provide some performance benefit over the unique index without the constraint? –Mike Mar 24 '14 at 20:29 add a comment|

I know there is a problem ahead, but want to get the data in and then report back what constraints are not going to work. OS : UNIX AIX Db: Oracle 9i Process: 32 Below listed commands are issued one by one using nohup from unix command prompt. Ask Tom Sign In QuestionsArchivesPopularHotResourcesAbout Questionsunique constraint violation on a disabled constraint Breadcrumb Question and Answer Thanks for the question. Ora-00001 Unique Constraint (sys.i_job_job) Violated Lengthwise or widthwise.

Finding out what constraints can be disabled—and how to detect them—takes a lot more digging. ops$tkyte%ORA10GR2> create table t ( x int ); Table created. Copyright © 2015 Oracle and/or its affiliates. check over here A unique constraint, for example, is visible in USER_CONSTRAINTS (or ALL_CONSTRAINTS or DBA_CONSTRAINTS).

ops$tkyte%ORA10GR2> create unique index t_unique on t(sys_extract_utc(x)); Index created. SQL> insert into e (empno) values (7934); 1 row created. [But here, I can disable the constraint AND drop the index -which would happen by default- and a violating row can the only RIGHT way to do this is a unique constraint. 5) because the mechanics, the physics behind unique enforcement involves an index. What object can prove the equations?

More on unique bits April 16, 2010 - 3:59 pm UTC Reviewer: John Hawksworth from Guildford, Surrey, UK (still no volcano ash) Er, well, yes, I nearly always use surrogacy, and but just use the create index clause of the constraint if you want. out naming standards .. and we said...

There is no unique constraint on column of that index. Unlike a check constraint, it appears you can't disable a unique constraint. See ASP.NET Ajax CDN Terms of Use – http://www.asp.net/ajaxlibrary/CDN.ashx. ]]> Home Trouble shooting Cry about... April 02, 2006 - 2:53 pm UTC Reviewer: reader Hello Tom, While reading the topic I got confuse about PRIMARY KEY!!

An index could be changed to be a non-unique index, but remember that the primary key must always be unique. Table 2. Copyright © 2003-2016 TechOnTheNet.com. ops$tkyte%ORA10GR2> insert into t values ( 1 ); 1 row created.

Is it dangerous to use default router admin passwords if only trusted users are allowed on the network? creation of unique constraint June 18, 2013 - 8:17 am UTC Reviewer: Michal Pravda from Prague Hi, can I (in some dictionary view I guess) investigate whether Oracle used existing index