Drop primary key

Hello

Using the version of database

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
AMT for Solaris: release 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production


When I use the command alter table < tablename > drop drop key primary index. the primary key and the corresponding index falls.

But when the same code is run in the environment SIT the associated primary key column became able NULL. Is it because of an incompatibility of versions of database? In my environment of the column is NOT yet Bull.

Can someone help me on this

Probably in a database of the column was already NOT NULL before creating the primary key constraint, and Oracle does not need to implicitly not null.
In other databases, there is no constraint NOT NULL, so when the primary key has been abandoned, the constraint was also missing.

Question of control procedures insufficient source, nothing to do with the versions of database.

-----------
Sybrand Bakker
Senior Oracle DBA

Tags: Database

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Elapsed: 00:00:00.01
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    Mr President

    My worm Jdev is 12.2.1.

    I have master tables / details.

    I have 2 lines for each PRIMARY KEY = ("VID", "LINEITEM") as below in the Details table.

    delete.png

    Please help how to get a button on a jsf page to remove these two lines at a time.

    Concerning

    So, in your app (data model) module, you have a master relationship / typical retail:

    And the relationship between them is based on some ViewLink

    Now go to the ViewLink, relationship, accessor.

    Take a look at the Destination accessor.

    Generate accessor object to check and give a name Acessor

    Then go to the master VO, Java and Include accessor, the class generate a display line:

    Go to the class view Java generated line, you'll find a method with the name of the accessor of the previous step, in the form of:

    public RowIterator getYourDetails...or_whaterever_IsAccessorName..() {
}

    Now, in the same Java class, write the following Java method:

    public void removeDetails(){
  RowIterator details = getYourDetails...or_whaterever_IsAccessorName..(); // it is RowIterator over all details
  Row r = details.first();
  while (r != null) {
      r.remove();
      r = details.next();
  }
}

    This method on the Cilent export line Interface:

    Finally, pass the data controls and drop this operation on the form as a button...

  • Trigger - use one to create primary key values

    I'm stuck on a simple use to do a TRIGGER that fires when you add new rows to a table and want to Developer SQL to add the primary key value.

    I seem to be able to relax, but it is not inserted the primary key but giving a SQL error: ORA-00947: not enough values.

    Here's what I have.

    CREATE TABLE HF_fishers

    (

    contact_id INT NOT NULL

    , name VARCHAR (25)

    , last_name VARCHAR (35)

    PRIMARY KEY (contact_id)

    );

    CREATE SEQUENCES HF_fishers_seq.

    Then I ran the following trigger:

    CREATE

    HF_fishers_seq_trigger RELAXATION

    BEFORE INSERTING

    ON HF_fishers

    FOR EACH LINE

    BEGIN

    IF (: new.contact_id IS NULL)

    THEN

    : NEW.contact_id: = NVL (: NEW.contact_id)

    HF_fishers_seq. NEXTVAL

    );

    END IF;

    END HF_fishers_seq_trigger;

    =============

    Then I executed the following SQL statement that gives the error.

    INSERT INTO HF_fishers VALUES('Jacob','Muller');

    But if I do everything is good except that it defeats the purpose of relaxation.

    INSERT INTO HF_fishers VALUES(1,'Jacob','Muller');

    MySQL has a nice 'AUTO_INCREMENT' command, but from what I understand in Oracle, I need to set up a trigger to automatically increment a column/cell, which in this case I use for the PRIMARY KEY.

    3003916 wrote:

    OK Jaramillo, I tried as you wrote, but what would be an INSERT statement correct?

    -After the code trigger of Jaramillo

    INSERT INTO HF_fishers (first_name, last_name) values ("Jesse", "Owens"); -I have the trigger but he made the mistake of duplicate key.

    INSERT INTO HF_fishers values (hf_fishers_seq.nextval, 'Jesse', "Owens");  -No trigger but get key duplicated,.

    INSERT INTO HF_fishers VALUES(:NEW_contact_id,'Jesse','Ownes'); -works without the trigger but the "get links" dialog box appears. So not much 'automatic' on this issue,.

    My mistake.  Here is the modified version of the trigger. I removed the CONDITIONAL clause and comes to be a part of the body of the trigger.

    So, I created the table, the sequence, the relaxation and ran the first two insert statements and it worked fine.  The third one you have invites SQL + or any tool you use to enter a value if she sees the ":" colon as a variable binding.  Colon only works in a trigger without asking for confirmation.

    Here is the code and my exit I ran home

    DROP TABLE hf_fishers CASCADE CONSTRAINTS PURGE;
DROP SEQUENCE hf_fishers_seq;

CREATE TABLE hf_fishers
(
contact_id   INTEGER NOT NULL
,first_name   VARCHAR(25)
,last_name    VARCHAR(35)
,PRIMARY KEY (contact_id)
);

CREATE SEQUENCE hf_fishers_seq;

CREATE OR REPLACE TRIGGER hf_fishers_seq_trigger
   BEFORE INSERT
   ON hf_fishers
   FOR EACH ROW
BEGIN

   IF(:NEW.contact_id IS NULL) THEN
      :NEW.contact_id := hf_fishers_seq.NEXTVAL;
   END IF;

END hf_fishers_seq_trigger;

INSERT INTO hf_fishers(first_name, last_name)
     VALUES ('Jesse', 'Owens');  -- Works with the trigger

INSERT INTO hf_fishers
     VALUES (hf_fishers_seq.nextval, 'Jesse', 'Owens');  --Works without using the trigger body code.

SELECT *
  FROM hf_fishers;

COMMIT;

    The output

    Deleted table.

    Elapsed time: 00:00:00.05

    Sequence has fallen.

    Elapsed time: 00:00:00.02

    Table created.

    Elapsed time: 00:00:00.03

    Order of creation.

    Elapsed time: 00:00:00.02

    Trigger created.

    Elapsed time: 00:00:01.05

    1 line of creation.

    Elapsed time: 00:00:00.04

    1 line of creation.

    Elapsed time: 00:00:00.01

    CONTACT_ID FIRST NAME LAST NAME

    ---------- ------------------------- -----------------------------------

    1 Jesse Owens

    2 Jesse Owens

    2 selected lines.

    Elapsed time: 00:00:00.04

    Validation complete.

    Elapsed time: 00:00:00.01

  • When I have a constarint of deferable in the Oracle database, while creating the ADF BC, all the columns in this table is marked as primary key. any help on how to fix this?

    DROP TABLE TWO.

    DROP TABLE ONE;

    CREATE TABLE 'A

    (

    ACTIVATE THE 'ID' NUMBER NOT NULL,

    ACTIVATE THE "SERIAL" VARCHAR2 (10 BYTE) NOT NULL,

    ACTIVATE THE "FIRST NAME" VARCHAR2 (30 BYTE) NOT NULL,

    ENABLE 'PK_ONE' CONSTRAINT PRIMARY KEY ('ID', "SERIAL")

    )

    TABLESPACE 'USERS ';

    CREATE TABLE "TWO"

    (

    ACTIVATE THE 'ID' NUMBER NOT NULL,

    ACTIVATE THE "SERIAL" VARCHAR2 (5 BYTE) NOT NULL,

    ACTIVATE THE "DEGREE_CODE" VARCHAR2 (10 BYTE) NOT NULL,

    'TEST_NAME' VARCHAR2 (20 BYTE),

    ACTIVATE THE KEY PRIMARY CONSTRAINT 'PK_TWO' ('ID', 'SERIAL'),

    "FK_TWO' FOREIGN KEY ('ID', 'DEGREE_CODE') CONSTRAINT REFERS TO 'ONE' ('ID', 'SERIAL') MAYBE DEFERRED ENABLE

    )

    TABLESPACE 'USERS ';

    If we use the above sql scripts to create the tables and create the ADF BC using the above 2 tables, all 4 columns in table 2 are reported as the primary key.

    User, tell us your version of Jdev, please!

    You should file an SR with support.oracle.com for this.

    As a work around you can change the area of occurrence, and remove the check mark key pirmary on the unwanted columns. After that, it should work.

    Timo

  • Removal of cascade of primary key constraints

    I have 3 tables. P_1 = primary key

    P_2 P_1 and P_3 reference reference P-2 referencing P_1 column.

    I dropped the PK on P_1 constraint with the cascade option. However P_3 always reference P_1.

    I thought that this was the case when I started.

    May sound like a stupid question as how I already tried, but when I delete a constraint of Pk, a 3rd table referencing a second column in tables referring to the original column that has the constraint of PK, this 3rd column will retain its FK reference at the second table... ?

    I remember reading somewhere on what is true, that at least I am sure that I read in one of the oradocs, I just want to ask.

    Thank you.

    To make it very simple thinks this way...

    Since then, you drop PK of 1 table only means that the link between the 1st and the 2nd table is broken, but that does not drop the pharmacokinetics of the 2nd table... Also the link between the 2nd and the 3rd table is intact...

    So yes, 3rd table will maintain the relationship of FK to the 2nd table.

    Hope that's clear...

  • [ADF, JDev12.1.3] Mastering the form with detail tables: questions about Insertion/deletion, commit / rollback, primary key, handling,...

    Hallo,

    I have a panelTabbed with 4 tabs. In the 1st tab, there is a master form while each of the other tabs, there is a secondary table. Each tab "reads" vo.

    Please see here http://digilander.libero.it/flattit82/OTN_FILES/VoInTabs.png

    I created the graphichs/layout and now it's time to take care of the management of the transaction.

    In the master tab / form

    1)

    Here, I would put a button to remove the master record.

    When I delete a record in the primary table an automatism in the database (MS SQL Server) will automatically delete any registration which are linked to it in the detail tables.

    Could the automated system as this causes problems?

    In the Details tabs / tables

    2)

    I would put a button in each row to delete the line delivering. Can I just drag-and - drop, like button, af line: table the operation "Delete" of the VO istance detail used to create the af: table?

    3)

    If Yes, by clicking on the button performs the default delete operation. But if need to perform some actions before you run the deletion (or, in General, any other operation), how can I do?

    4)

    To create a folder that I use Create or CreateInsert? And what are the differences between them?

    5)

    When I create a new record I need set the value of a field of the VO on which is based the af: table. He filed, let's call it RowDetNumber, is not displayed in the af: table, because it doesn't have be filled in by the user. Mut value is calculated and set "secretly" before posting the new line to the database table. In particular, its value must be calculated as

    Select max (RowDetNumber) + 1

    of table_on_which_VO_is_based

    where some_conditions_on_fields_of_the_same_VO


    For example

    The VO selects all of the records that have FkId =: value. If value = 3, VO selection records:

    ID RowDetNumber OtherFields FkId

    1   3     1             ...

    2   3     2             ...

    3   3     3             ...

    4   3     4             ...

    The new record must be RowDetNumber = 5.

    I would like to know how permorm this.

    In general

    6)

    If the database tables have 1 or more triggers I have to take care of something?

    7)

    On the book "development of Web Applications with Oracle ADF Essentials - Sten E. Vesterli", I have read it could be problems when you use tables of database non-Oracle with auto-increment fields.

    The advice of author uncheck the 'Required' box in the model.

    All tables in my database have a primary keys that are auto-increment... so I uncheck the "mandatory"?

    8)

    In general how do I set these fields? I have to put in OT, VO or both?

    Thank you

    Federico

    Hello

    (1) you will need to re - question child iterators so that they do not look stale data

    (2) Yes. Ensure that the table is PPRed after deleting the line (should happen automatically if ChangeEventPolicy on iterator is set to ppr)

    (3) double click on the button and it creates a bean managed for you. It allows you to check a box to generate the code he would run to remove the line. Everything you put in front of the generated code is your code before

    (4) in the case of tables, use createInsert as it adds the new line to the rowset (transaction)

    (5) suggest to do this use a database trigger and the data attribute value DBSequence VO type

    (6) do not 'drop table' issue in SQL (sorry, couldn't resist ;-))

    (7) If you follow the advice of the author, Yes. What it does, I have it does not throw an exception if a value is missing in the validation of the line

    (8) usually you set whatever it is at the level of the OS and put only things on VO if you want to override the default value for a specific behavior


    Frank

  • How to extract the values of the line full in the bean to support using the primary key

    Hello

    I have a table that has columns as plant_name, business planner email id and identification of email resident engineer. Here, Plant_name is the primary key.

    Now, I have this plant's name slipped and dropped like selectonechoice (drop) on page jsff. In this user can select any name of 1 plant drop down.

    Right now, I can go get plant in backing bean name, but I can't understand how business plan for extraction and identification of email of the engineer resident in this key primary-plant_name at the bean to support.

    Please let me know if anyone has an idea in this regard.

    JDeveloper version 11.1.1.6.0

    Thanks in advance.

    Sneha

    Sneha211 wrote:

    On the jsff page

    required = "#{bindings." Plant.hints.Mandatory}.

    shortDesc = "#{bindings." Plant.hints.ToolTip}.

    ID = "soc1" unselectedLabel = "- Select -"

    autoSubmit = 'true '.

    Binding = "#{backingBeanScope.backingbean.plantbean}" > "

    ID = "si1" / >

    In backing bean

    DCBindingContainer = lBindingContainer

    (DCBindingContainer) BindingContext.getCurrent () .getCurrentBindingsEntry ();

    DCIteratorBinding lBinding = lBindingContainer.findIteratorBinding("SupplierVO1Iterator");

    NewRow row = lBinding.getCurrentRow ();

    String aamplant1 = (String) newRow.getAttribute ("Plant");

    Hi Sneha, you've written code for it

    you have found the current line and the primary key then this line, then why you not not using this same rank to get the other attributes?

    NewRow row = lBinding.getCurrentRow ();

    String aamplant1 = (String) newRow.getAttribute ("Plant");

    String businessPalnner = (String) newRow.getAttribute ("business_planner"); Returns the value of the same line

    Engineer in String = (String) newRow.getAttribute ("engineer");


    OR if your condition is like that-

    you have a primary key field value, but you do not have the corresponding line, then you can get that line and it's attribute by using the primary key value

    See - http://adfgouravtkiet.blogspot.in/2012/10/filtering-of-data-from-vo.html

    Hope it helps

    -Ashish

  • Too many objects correspond to the primary key oracle.jbo.Key

    I get this error: Too many objects match the primary key oracle.jbo.Key when I tried to look for in a display object where the primary key is consists of more than one filed.

    Use case:

    In Jdeveloper 11.1.2.3 I Entity object called someTable this table has three fields A,B and C where the primary key is consist class towing A and B .

    I created different towing View object of someTable object enity that are someTableVO1 and someTableVO2 . Rated A in the view object somtableVO1 is a List Of Value(LOV) and the data are coming form filed A in the someTableVO2 .

    In application I have a search page that contains a drop-down list of registered A in somTableVO1 . Based on certain conditions, the drop-down list of the values in the list is not static. The value of the drop-down list is editable based on a select query run on someTableVO1 and it is based on the class thried C is NOT part of the primary key .

    The page displays the drop down menu with the correct values. But I have a ValeChangeListener method that will be activated whenever the user selects a value form the drop-down list.

    The problem is:

    The error Too many objects match the primary key is occur whenever I am executing this method.

    Support:

    I think the problem is with multiple fields for the primary key. of curse, there is an overlap in a part of the primary key (IE that paid A or B ) but the combination of A and B are always unique.

    Notes:

    1. I check the query by executing SQL Developer and it shows not all duplicate values.

    2 I don't attach code, because I think that the problem is not on (how to) this is (what to do).

    I hope that the idea is clear

    Problem solved.

    My goal was to show a summer that A form someTableVO1 as a list of value and I was trying to achieve by creating the list of value the same form Entity object . I understand that it was the wrong approach (correct me if I'm wrong). to achieve this in ADF technology, I have to do the following:

    1. Simply to drag and drop the view object from the Data Controls page.
    2. List of options appears asking how you want to display the view object (shape, chart, table, only one selection,...).

    3. Select Single Selection ->ADF one Selection

    4. Select the attributes that you want to show the user a list of values.

    Thanks for your comments.

  • where can I use statement box put Null or not primary key or null in the result?

    create the table test_target

    (

    letter_grade varchar2 (2) null,

    grade_point number (3,2) not null,

    max_grade number (3).

    min_grade number 4

    );

    create the table test_source

    (

    letter_grade VARCHAR2 (3),

    grade_point number (3,2).

    max_grade number (3,2).

    min_grade number (3).

    created_by date,

    Modified_By date

    );

    with the CBC as

    (

    Select src.table_name src_table_name, src.column_name src_col_name, src.data_type src_data_type, src.data_length src_data_len, src.data_precision src_data_precision, src.data_scale src_data_scale, src.nullable src_nullable

    user_tab_columns CBC

    where table_name = 'TEST_SOURCE '.

    ),

    As TGT

    (

    Select tgt.table_name tgt_table_name, tgt.column_name tgt_col_name, tgt.data_type tgt_data_type, tgt.data_length tgt_data_len, tgt.data_precision tgt_data_precision, tgt.data_scale tgt_data_scale, tgt.nullable tgt_nullable

    of tgt user_tab_columns

    where table_name = 'TEST_TARGET '.

    ),

    col_details as

    (

    Select src.src_table_name, nvl (tgt.tgt_table_name, first_value (tgt_table_name) more (order of nulls last tgt_table_name)) tgt_table_name;

    SRC.src_col_name, src.src_data_type, src.src_data_len, src.src_data_precision, src.src_data_scale, src.src_nullable,

    TGT.tgt_col_name, tgt.tgt_data_type, tgt.tgt_data_len, tgt.tgt_data_precision, tgt.tgt_data_scale, tgt.tgt_nullable

    the CBC

    outer join left tgt

    on)

    SRC.src_col_name = tgt.tgt_col_name

    )

    )

    Select *.

    de)

    Select the case sensitive option

    When tgt_data_type! = src_data_type or tgt_data_len! = src_data_len or tgt_data_precision! = src_data_precision or tgt_data_scale! = src_data_scale or tgt_nullable! = src_nullable

    then 'alter table ' | tgt_table_name | 'Edit ' | tgt_col_name | ' ' || src_data_type | ' (' ||

    -case when src_data_type null ('DATE') then

    on the other

    case

    When src_data_type in ('VARCHAR', 'VARCHAR2')

    then nvl (to_char (src_data_len), ' ') | ') '

    otherwise decode (nvl (src_data_precision-1),-1, null, nvl (to_char (src_data_precision), ' ') |) ', ' || NVL (to_char (src_data_scale), ' ') | ')')

    end

    end

    When tgt_col_name is null

    then 'alter table ' | tgt_table_name | 'Add ' | src_col_name | ' ' || src_data_type |

    -case when src_data_type null ('DATE') then

    on the other

    case

    When src_data_type in ('VARCHAR', 'VARCHAR2')

    then nvl (to_char (src_data_len), ' ') | ') '

    otherwise decode (nvl (src_data_precision-1),-1, null, nvl (to_char (src_data_precision), ' ') |) ', ' || NVL (to_char (src_data_scale), ' ') | ')')

    end

    end

    end alter_statement

    of col_details

    )

    where alter_statement is not null;

    result:

    ALTER table TEST_TARGET change LETTER_GRADE VARCHAR2 (3) / / if it is null or not null primary key or want to see the result as alter table TEST_TARGET change LETTER_GRADE VARCHAR2 (3) null or not null or primary key

    ALTER table TEST_TARGET change the NUMBER of MAX_GRADE (3, 2)

    ALTER table TEST_TARGET change the MIN_GRADE NUMBER (3, 0)

    ALTER table TEST_TARGET add CREATED_BY

    ALTER table TEST_TARGET add MODIFIED_BY

    Please try:

    drop table test_target purge;

    drop table test_source purge;

    create the table test_target

    (

    letter_grade varchar2 (2) primary key,.

    grade_point number (3,2) not null,

    max_grade number (3) unique.

    min_grade number 4,

    MIN_AGE number 4

    );

    create the table test_source

    (

    letter_grade VARCHAR2 (3),

    grade_point number (3,2).

    max_grade number (3,2).

    min_grade number (3).

    created_by date,

    Modified_By date

    );

    with the CBC as

    (

    Select src.table_name src_table_name, src.column_name src_col_name, src.data_type src_data_type, src.data_length src_data_len, src.data_precision src_data_precision, src.data_scale src_data_scale,

    CBC. Nullable src_nullable, decode (T.Constraint_Type, 'P', 'Primary Key', 'U', 'Unique', ") as src_cons

    user_tab_columns CBC

    left join (select Cc.Column_Name, Uc.Constraint_Type

    of user_cons_columns cc, uc user_constraints

    where Cc.Constraint_Name = Uc.Constraint_Name

    and Cc.Table_Name = Uc.Table_Name) t

    on T.Column_Name = Src.Column_Name

    where table_name = 'TEST_SOURCE '.

    ),

    As TGT

    (

    Select tgt.table_name tgt_table_name, tgt.column_name tgt_col_name, tgt.data_type tgt_data_type, tgt.data_length tgt_data_len,

    TGT.data_precision tgt_data_precision, tgt.data_scale tgt_data_scale, tgt.nullable tgt_nullable,

    Decode (T.Constraint_Type, 'P', 'Primary Key', 'U', 'Unique', ") as tgt_cons

    of tgt user_tab_columns

    left join (select Cc.Column_Name, Uc.Constraint_Type

    of user_cons_columns cc, uc user_constraints

    where Cc.Constraint_Name = Uc.Constraint_Name

    and Cc.Table_Name = Uc.Table_Name) t

    on T.Column_Name = TGT. Column_Name

    where table_name = 'TEST_TARGET '.

    ),

    col_details as

    (

    Select src.src_table_name, nvl (tgt.tgt_table_name, first_value (tgt_table_name) more (order of nulls last tgt_table_name)) tgt_table_name;

    SRC.src_col_name, src.src_data_type, src.src_data_len, src.src_data_precision, src.src_data_scale, src.src_nullable, src_cons,

    TGT.tgt_col_name, tgt.tgt_data_type, tgt.tgt_data_len, tgt.tgt_data_precision, tgt.tgt_data_scale, tgt.tgt_nullable, tgt_cons

    the CBC

    outer join full tgt

    on)

    SRC.src_col_name = tgt.tgt_col_name

    )

    )

    Select *.

    de)

    Select the case sensitive option

    When tgt_data_type! = src_data_type or tgt_data_len! = src_data_len or tgt_data_precision! = src_data_precision or tgt_data_scale! = src_data_scale or tgt_nullable! = src_nullable

    then 'alter table ' | tgt_table_name | 'Edit ' | tgt_col_name | ' ' || src_data_type | ' (' ||

    -case when src_data_type null ('DATE') then

    on the other

    case

    When src_data_type in ('VARCHAR', 'VARCHAR2')

    then nvl (to_char (src_data_len), ' ') | ') '

    otherwise decode (nvl (src_data_precision-1),-1, null, nvl (to_char (src_data_precision), ' ') |) ', ' || NVL (to_char (src_data_scale), ' ') | ')')

    end

    end

    ||

    cases where tgt_nullable = 'Y' then 'null '.

    of another end 'not null '.

    || tgt_cons

    When tgt_col_name is null

    then 'alter table ' | tgt_table_name | 'Add ' | src_col_name | ' ' || src_data_type |

    -case when src_data_type null ('DATE') then

    on the other

    case

    When src_data_type in ('VARCHAR', 'VARCHAR2')

    then nvl (to_char (src_data_len), ' ') | ') '

    otherwise decode (nvl (src_data_precision-1),-1, null, nvl (to_char (src_data_precision), ' ') |) ', ' || NVL (to_char (src_data_scale), ' ') | ')')

    end

    end

    || tgt_cons

    When src_col_name is null

    then 'alter table' | tgt_table_name: ' drop '. tgt_col_name

    end alter_statement

    of col_details

    )

    where alter_statement is not null;

    priamry key and unique key you choose user_contraints

    Check and change for your condition

    Concerning

    Mr. Mahir Quluzade

  • Accompanied by primary key to a non-unique index?

    Met a weird situation today. A utility, we set up which allows analysts to restore the data in their paintings, started failed when it attempted to drop an index. The index supported a primary key. Makes sense. But our script was supposed to be only an attempt to drop/recreate the nonunique indexes. It turns out that supported on the primary key index was not unique and to the best of my knowledge has emerged as follows:
    SQL> create table junk (f number(1));

Table created.

SQL> create index junk_ix on junk(f);

Index created.

SQL> select UNIQUENESS from DBA_INDEXES where index_name = 'JUNK_IX';

UNIQUENES
---------
NONUNIQUE

SQL> alter table forbesc.junk add constraint junk_pk primary key (f) using index junk_ix;

Table altered.

SQL> select UNIQUENESS from DBA_INDEXES where index_name = 'JUNK_IX';

UNIQUENES
---------
NONUNIQUE

SQL> insert into junk values (1);

1 row created.

SQL> insert into junk values (1);
insert into junk values (1)
*
ERROR at line 1:
ORA-00001: unique constraint (FORBESC.JUNK_PK) violated


SQL> select index_name from dba_constraints where constraint_name = 'JUNK_PK';

INDEX_NAME
------------------------------
JUNK_IX
    What I can't understand, is how an index is not unique is to apply oneness. I thought it was the key to this process. I thought that perhaps an index with the 'SYS_123456' has be created, perhaps, but I couldn't find a:
    SQL> select object_name, object_type from dba_objects order by created desc;


OBJECT_NAME   OBJECT_TYPE
-------------------------------------------     
JUNK_IX     INDEX
JUNK     TABLE
...
    How the uniqueness is get applied in this case? It comes in Oracle 11.1.0.7

    Thank you
    -= Chuck

    It has always been like that. Oracle can and will use a non-unique index to apply a constraint to PK, the existing index just needs to have the columns PK as the leader or the columns in the index:

    SQL> create table t (id number, id1 number, descr varchar2(10));

Table created.

SQL> create index t_ids on t(id, id1);

Index created.

SQL> select index_name from user_indexes
  2  where table_name = 'T';

INDEX_NAME
------------------------------
T_IDS

SQL> alter table t add constraint t_pk
  2  primary key (id);

Table altered.

SQL> select index_name from user_indexes
  2  where table_name = 'T';

INDEX_NAME
------------------------------
T_IDS

SQL> insert into t values (1, 1, 'One');

1 row created.

SQL> insert into t values (1, 2, 'Two');
insert into t values (1, 2, 'Two')
*
ERROR at line 1:
ORA-00001: unique constraint (OPS$ORACLE.T_PK) violated

    John

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