sequence value recycle

Hello

Just a question about the operation of sequences. If its used for the primary key and I remove a line (say ID: 1058), a sequence would generate 1058 again? Or would it just continue upward to MAXVALUE?

Thank you

11 G R2 using Linux

>
Just a question about the operation of sequences. If its used for the primary key and I remove a line (say ID: 1058), a sequence would generate 1058 again? Or would it just continue upward to MAXVALUE?
>
Whenever you call NEXTVAL continues upward to the MAX VALUE.

A sequence is an object of independent schema. He is not aware of any other object, a table, or if its value is always used.

See CREATE SEQUENCE in the doc of SQL language
http://docs.Oracle.com/CD/B28359_01/server.111/b28286/statements_6015.htm
>
Use the CREATE SEQUENCE statement to create a sequence, which is an object database where several users can generate unique integers. You can use sequences to automatically generate primary key values.

When a sequence number is generated, the sequence is incremented, independent of the transaction validation or restoration. If two users concurrently increment the same sequence, sequence numbers acquired by each user may have gaps because sequence numbers are generated by the other user. A user can never acquire the sequence number generated by another user. When a sequence value is generated by a user, that user can continue to access this value, regardless of whether if the sequence is incremented by another user.

Sequence numbers are generated independently of tables, so the same sequence can be used for one or more tables. It is possible that individual numbers will be seem to be ignored, as they were generated and used as part of an operation which finally cancelled.
In addition, a single user may not realize that other users are in the same sequence.

Once a sequence is created, you can access its values in SQL statements with the virtual CURRVAL, which returns the current value of the sequence, or the virtual NEXTVAL, which increments the sequence and returns the new value.

Tags: Database

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    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1490)

    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)

    at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)

    Caused by: java.sql.SQLRecoverableException: Connection closed

    at oracle.jdbc.driver.PhysicalConnection.createStatement(PhysicalConnection.java:4070)

    at oracle.jdbc.driver.PhysicalConnection.createStatement(PhysicalConnection.java:4008)

    at oracle.jdbc.OracleConnectionWrapper.createStatement(OracleConnectionWrapper.java:112)

    at weblogic.jdbc.wrapper.XAConnection.createStatement(XAConnection.java:623)

    at weblogic.jdbc.wrapper.Connection.createStatement(Connection.java:500)

    at oracle.jbo.pcoll.OraclePersistManager.queryNextCollectionId(OraclePersistManager.java:1459)

    ... more than 114

    # # 0 in detail

    java.sql.SQLRecoverableException: closing connection

    at oracle.jdbc.driver.PhysicalConnection.createStatement(PhysicalConnection.java:4070)

    at oracle.jdbc.driver.PhysicalConnection.createStatement(PhysicalConnection.java:4008)

    at oracle.jdbc.OracleConnectionWrapper.createStatement(OracleConnectionWrapper.java:112)

    at weblogic.jdbc.wrapper.XAConnection.createStatement(XAConnection.java:623)

    at weblogic.jdbc.wrapper.Connection.createStatement(Connection.java:500)

    at oracle.jbo.pcoll.OraclePersistManager.queryNextCollectionId(OraclePersistManager.java:1459)

    at oracle.jbo.pcoll.PCollManager.register(PCollManager.java:562)

    to oracle.jbo.pcoll.PCollection. < init > (PCollection.java:99)

    at oracle.jbo.pcoll.PCollManager.createCollection(PCollManager.java:461)

    at oracle.jbo.server.DBSerializer.setup(DBSerializer.java:153)

    at oracle.jbo.server.DBSerializer.passivateRootAM(DBSerializer.java:286)

    at oracle.jbo.server.DBSerializer.passivateRootAM(DBSerializer.java:267)

    at oracle.jbo.server.ApplicationModuleImpl.passivateStateInternal(ApplicationModuleImpl.java:6026)

    at oracle.jbo.server.ApplicationModuleImpl.passivateState(ApplicationModuleImpl.java:5877)

    at oracle.jbo.server.ApplicationPoolMessageHandler.doPoolMessage(ApplicationPoolMessageHandler.java:386)

    at oracle.jbo.server.ApplicationModuleImpl.doPoolMessage(ApplicationModuleImpl.java:9084)

    at oracle.jbo.common.ampool.ApplicationPoolImpl.sendPoolMessage(ApplicationPoolImpl.java:4607)

    at oracle.jbo.common.ampool.ApplicationPoolImpl.manageReferencingState(ApplicationPoolImpl.java:1493)

    at oracle.jbo.common.ampool.ApplicationPoolImpl.finalizeResource(ApplicationPoolImpl.java:1393)

    at oracle.jbo.pool.ResourcePool.removeResourceInternal(ResourcePool.java:848)

    at oracle.jbo.pool.ResourcePool.setState(ResourcePool.java:1103)

    at oracle.jbo.pool.ResourcePool.removeResource(ResourcePool.java:860)

    at oracle.jbo.common.ampool.ApplicationPoolImpl.removeDeadInstance(ApplicationPoolImpl.java:2736)

    at oracle.jbo.common.ampool.ApplicationPoolImpl.sendPoolMessage(ApplicationPoolImpl.java:4638)

    at oracle.jbo.common.ampool.ApplicationPoolImpl.manageReferencingState(ApplicationPoolImpl.java:1493)

    at oracle.jbo.common.ampool.ApplicationPoolImpl.recycleReferencedInstance(ApplicationPoolImpl.java:2623)

    at oracle.jbo.common.ampool.ApplicationPoolImpl.prepareApplicationModule(ApplicationPoolImpl.java:2444)

    at oracle.jbo.common.ampool.ApplicationPoolImpl.doCheckout(ApplicationPoolImpl.java:2347)

    at oracle.jbo.common.ampool.ApplicationPoolImpl.useApplicationModule(ApplicationPoolImpl.java:3246)

    at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:572)

    at oracle.jbo.http.HttpSessionCookieImpl.useApplicationModule(HttpSessionCookieImpl.java:234)

    at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:505)

    at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:500)

    at oracle.adf.model.bc4j.DCJboDataControl.initializeApplicationModule(DCJboDataControl.java:523)

    at oracle.adf.model.bc4j.DCJboDataControl.getApplicationModule(DCJboDataControl.java:869)

    at oracle.adf.model.binding.DCDataControl.setErrorHandler(DCDataControl.java:484)

    at oracle.jbo.uicli.binding.JUApplication.setErrorHandler(JUApplication.java:261)

    at oracle.adf.model.BindingContext.put(BindingContext.java:1340)

    at oracle.adf.model.binding.DCDataControlReference.getDataControl(DCDataControlReference.java:174)

    at oracle.adf.model.BindingContext.instantiateDataControl(BindingContext.java:1056)

    at oracle.adf.model.dcframe.DataControlFrameImpl.doFindDataControl(DataControlFrameImpl.java:1566)

    at oracle.adf.model.dcframe.DataControlFrameImpl.internalFindDataControl(DataControlFrameImpl.java:1438)

    at oracle.adf.model.dcframe.DataControlFrameImpl.findDataControl(DataControlFrameImpl.java:1398)

    at oracle.adf.model.BindingContext.internalFindDataControl(BindingContext.java:1189)

    at oracle.adf.model.BindingContext.get(BindingContext.java:1139)

    at oracle.adf.model.binding.DCParameter.evaluateValue(DCParameter.java:82)

    at oracle.adf.model.binding.DCParameter.getValue(DCParameter.java:111)

    at oracle.adf.model.binding.DCBindingContainer.getChildByName(DCBindingContainer.java:2713)

    at oracle.adf.model.binding.DCBindingContainer.internalGet(DCBindingContainer.java:2761)

    at oracle.adf.model.binding.DCExecutableBinding.get(DCExecutableBinding.java:115)

    at oracle.adf.model.binding.DCUtil.findSpelObject(DCUtil.java:304)

    at oracle.adf.model.binding.DCBindingContainer.evaluateParameterWithElCheck(DCBindingContainer.java:1458)

    at oracle.adf.model.binding.DCBindingContainer.findDataControl(DCBindingContainer.java:1588)

    at oracle.adf.model.binding.DCIteratorBinding.initDataControl(DCIteratorBinding.java:2472)

    at oracle.adf.model.binding.DCIteratorBinding.getDataControl(DCIteratorBinding.java:2416)

    at oracle.adf.model.binding.DCBindingContainer.internalRefreshControl(DCBindingContainer.java:3069)

    at oracle.adf.model.binding.DCBindingContainer.refresh(DCBindingContainer.java:2876)

    at oracle.adf.model.binding.DCBindingContainer.internalRefreshControl(DCBindingContainer.java:3195)

    at oracle.adf.model.binding.DCBindingContainer.refresh(DCBindingContainer.java:2876)

    at oracle.adf.controller.v2.lifecycle.PageLifecycleImpl.prepareModel(PageLifecycleImpl.java:115)

    at oracle.adf.controller.faces.lifecycle.FacesPageLifecycle.prepareModel(FacesPageLifecycle.java:359)

    to oracle.adf.controller.v2.lifecycle.Lifecycle$ 2.execute(Lifecycle.java:137)

    at oracle.adfinternal.controller.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:197)

    to oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener.access$ 400 (ADFPhaseListener.java:23)

    to oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener$ PhaseInvokerImpl.startPageLifecycle (ADFPhaseListener.java:238)

    to oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener$ 1.after(ADFPhaseListener.java:274)

    at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener.afterPhase(ADFPhaseListener.java:75)

    at oracle.adfinternal.controller.faces.lifecycle.ADFLifecyclePhaseListener.afterPhase(ADFLifecyclePhaseListener.java:53)

    at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:472)

    at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:194)

    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)

    to weblogic.servlet.internal.StubSecurityHelper$ ServletServiceAction.run (StubSecurityHelper.java:227)

    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)

    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)

    at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at alfaaesar.portal.pages.filter.AnonymousSessionFilter.doFilter(AnonymousSessionFilter.java:47)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at oracle.portlet.client.adapter.adf.ADFPortletFilter.doFilter(ADFPortletFilter.java:32)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at oracle.webcenter.framework.events.dispatcher.EventDispatcherFilter.doFilter(EventDispatcherFilter.java:44)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:205)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:106)

    to org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$ FilterListChain.doFilter (TrinidadFilterImpl.java:446)

    at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)

    to org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$ FilterListChain.doFilter (TrinidadFilterImpl.java:446)

    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:271)

    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:177)

    at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at oracle.wcps.client.PersonalizationFilter.doFilter(PersonalizationFilter.java:75)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at oracle.webcenter.content.integration.servlets.ContentServletFilter.doFilter(ContentServletFilter.java:168)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at oracle.webcenter.lifecycle.filter.LifecycleLockFilter.doFilter(LifecycleLockFilter.java:151)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:179)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    to oracle.security.jps.ee.http.JpsAbsFilter$ 1.run(JpsAbsFilter.java:119)

    at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315)

    at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:442)

    at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103)

    at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171)

    at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:139)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)

    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)

    to weblogic.servlet.internal.WebAppServletContext$ ServletInvocationAction.wrapRun (WebAppServletContext.java:3730)

    to weblogic.servlet.internal.WebAppServletContext$ ServletInvocationAction.run (WebAppServletContext.java:3696)

    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)

    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)

    at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2273)

    at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2179)

    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1490)

    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)

    at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)

    ]]

    Table PXN_TXN, where the ADFBC tent passivate the StateFull AppModules State.

    (1) where you can hit this error is because you din't create / Create index of the privileges of the user who is using to connect to the DB.

    (2) ideally, the status of users is removed after the end of the session of the user, but when the app is closed unexpectedly due to the loss of Server/DB,

    State ID remains in the table and it is not recommended to clean the tables using the database standard PROCEDURE calls provided by Oracle oracle

    The following links will be useful to understand the function of the

    The application state management

    http://www.Veriton.co.UK/download/Practical_ADF_Application_Deployment.PDF

    Perform the following procedure, clean the tables PS_TXN to put in place the BC4J_CLEANUP PL/SQL package

    oracle_common/modules/Oracle.ADF.model_11.1.1/bin/bc4jcleanup. SQL

    Annex BC4J_CLEANUP. SESSION_STATE(24*60) using DBMS Scheduler to clean up the States for more than 24 hours.

  • Get the previous value of the sequence

    Oracle version
    10.2.0

    sequence
    CREATE SEQUENCE ADM_SQ_TABLE_GROUP
  START WITH 21
  MAXVALUE 999999999999999999999999999
  MINVALUE 1
  NOCYCLE
  CACHE 20
  NOORDER;
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    CREATE TABLE ADM_TL_TABLE_GROUPMST
(
TBGM_KEYID   VARCHAR2(6)    NOT NULL,
TBGM_NAME    VARCHAR2(50)   NOT NULL,
TBGM_CODE    VARCHAR2(15)   NOT NULL,
CONSTRAINT PK_ADM_TL_TABLE_GROUPMST PRIMARY KEY (TBGM_KEYID),
CONSTRAINT UK_TBGM_CODE UNIQUE(TBGM_CODE)
);
    Insert values
    INSERT INTO ADM_TL_TABLE_GROUPMST VALUES (adm_sq_table_group.NEXTVAL, 'PCS TABLE GROUP', 'PCS');
    Table Details
    CREATE TABLE ADM_TL_TABLE_GROUPDTL
(
TBGD_KEYID  VARCHAR2(8) NOT NULL,
TBGD_MASTERID VARCHAR2(6)    NOT NULL,
TBGD_TABLENAME  VARCHAR2(30)    NOT NULL,
TBGD_ORDER      NUMBER(2)   NOT NULL,
CONSTRAINT PK_ADM_TL_TABLE_GROUPDTL PRIMARY KEY (TBGD_KEYID),
CONSTRAINT FK_TBGD_MASTERID FOREIGN KEY (TBGD_MASTERID) REFERENCES  ADM_TL_TABLE_GROUPMST(TBGM_KEYID)
);
    Insert the script
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    How to get previously generated sequence values

    Use the VOTING class if you use PL/SQL

  • How to value all the sequence all the table schema/user

    Hello

    I use the Oracle 11 g server. I have a table close to 100. I want to know all the current sequence value ("Currval")
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    Thanks in advance
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    nordine B wrote:
    Try this...

    SELECT sequence_name, last_number FROM all_sequences
where lower(sequence_owner) = '';

    HTH
    Vanessa B.

    Published by: Vanessa B December 3, 2012 13:25

    It is not always correct (again that depends on the condition)

    create sequence seq1 cache 100;

SELECT sequence_name, last_number
FROM all_sequences
where sequence_name = 'SEQ1';

SEQUENCE_NAME                  LAST_NUMBER
------------------------------ -----------
SEQ1                                     1 

select seq1.nextval from dual;

NEXTVAL
-------
      1

SELECT sequence_name, last_number
FROM all_sequences
where sequence_name = 'SEQ1';

SEQUENCE_NAME                  LAST_NUMBER
------------------------------ -----------
SEQ1                                   101 --"Showing 101"

select seq1.currval from dual;

CURRVAL
-------
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  • The value of the sequence to a field assignment

    Hi all

    Apex v3.2.1
    I created a form and a report on a single table. Column1 of the table is the primary key that is generated by a sequence of "seq_col1".
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    Now, when you insert a new record via the form, how do I put the Column1 as the seq_col1.nextval is inserted into the table?

    I make the assumption that you fill the column on a data, then click on create, then branch to a 2nd page to display the ID and the other data in the column.

    If all this is true, then:
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    Process is

        SELECT ATTACHMENT_ID_SEQ.NEXTVAL
       INTO :P1_COLUMN1
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    Specify that the process is running when you press the button create.

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    The flow rate is:
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  • How to insert a value of triggers in the table?

    Mr President.

    I have the following trigger

    CREATE OR REPLACE TRIGGER lineitem_trg 
BEFORE UPDATE OF lineitem ON voucherdet
FOR EACH ROW
BEGIN 
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END  lineitem_trg; 
/

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  "ACCT_ID" VARCHAR2(7) NOT NULL ENABLE, 
  "ACCT_NAME" VARCHAR2(50) NOT NULL ENABLE, 
  "O_BAL" NUMBER(13,2), 
  "ITAX_ID" VARCHAR2(7), 
  "SALES_TAX_NO" VARCHAR2(20), 
  "PL_SUPPLIER" VARCHAR2(1) DEFAULT 'N', 
  "STOCK_REPORT" VARCHAR2(1) DEFAULT 'N', 
  "ACCT_TYPE" VARCHAR2(4), 
  CONSTRAINT NOM_PK PRIMARY KEY ("ACCT_ID")ENABLE, 
  CONSTRAINT NOM_ACCT_TYPE_FK FOREIGN KEY ("ACCT_TYPE")
   REFERENCES "ACCT_TYPE" ("ACCT_TYPE") ENABLE
   );
CREATE TABLE "VOUCHER" (
  "VOUCHER_ID" VARCHAR2(8) NOT NULL ENABLE, 
  "VOUCHER_DATE" DATE DEFAULT sysdate, 
  "POST_DATE" DATE DEFAULT sysdate, 
  "DEBIT" VARCHAR2(7), 
  "CREDIT" VARCHAR2(7), 
  "VOUCHER_SOURCE" VARCHAR2(2), 
  CONSTRAINT VOUCHER_PK PRIMARY KEY ("VOUCHER_ID")ENABLE, 
  CONSTRAINT VOUCHER_NOM_DEBIT_FK FOREIGN KEY ("DEBIT")
   REFERENCES "NOM" ("ACCT_ID") ENABLE, 
  CONSTRAINT VOUCHER_NOM_CREDIT_FK FOREIGN KEY ("CREDIT")
   REFERENCES "NOM" ("ACCT_ID") ENABLE
   );


CREATE TABLE "VOUCHERDET" (
  "VOUCHER_ID" VARCHAR2(8) NOT NULL ENABLE, 
  "DEBIT" VARCHAR2(7) NOT NULL ENABLE, 
  "CREDIT" VARCHAR2(7) NOT NULL ENABLE, 
  "PARTICULARS" VARCHAR2(100), 
  "AMOUNT" NUMBER(21,2),
  "LINEITEM" VARCHAR2(4) DEFAULT '01', 
  "V_ID_ITAX" VARCHAR2(11), 
  "V_ID_PAY" VARCHAR2(11), 
  "CHALLAN_NO" VARCHAR2(10), 
  CONSTRAINT VOUCHERDET_PK PRIMARY KEY ("VOUCHER_ID", "LINEITEM")ENABLE, 
  CONSTRAINT VOUCHERDET_DEBIT_FK FOREIGN KEY ("DEBIT")
   REFERENCES "NOM" ("ACCT_ID") ENABLE, 
  CONSTRAINT VOUCHERDET_CREDIT_FK FOREIGN KEY ("CREDIT")
   REFERENCES "NOM" ("ACCT_ID") ENABLE, 
  CONSTRAINT VOUCHERDET_VOUCHER_FK FOREIGN KEY ("VOUCHER_ID")
   REFERENCES "VOUCHER" ("VOUCHER_ID") ON DELETE CASCADE ENABLE
   );





    CREATE SEQUENCE VOUCHER_ID_SEQ INCREMENT BY 1 START WITH 1;


begin
 execute immediate 'create or replace trigger VOUCHER_ID_TRG  '||chr(10)||
  '   before insert on "ALIZA"."VOUCHER" '||chr(10)||
  '   for each row '||chr(10)||
  'begin  '||chr(10)||
  '   if inserting then '||chr(10)||
  '      if :NEW."VOUCHER_ID" is null then '||chr(10)||
  '         select VOUCHER_ID_SEQ.nextval into :NEW."VOUCHER_ID" from dual; '||chr(10)||
  '      end if; '||chr(10)||
  '   end if; '||chr(10)||
  'end;'||chr(10);
  end;
  /

    Concerning

    And I explained to you why it is false.

    Go one read what I put above, and I gave an example of (with command and control elements) in the other thread.

    If you want the user a composite key as the primary key by using the primary key of the voucher and something else, do this thing, just a sequence that is obtained from a sequence value (not gapless, but always unique).  And then you always build your LINEITEM values for display based on this sequence for example

    LPAD (to_char (ROW_NUMBER () over (partition by order VOUCHER_ID by LINEITEM)), 2, '0') as a CONTROL element

    It's when you query the data to display it, is not to store it in the database.  In the database, you simply store an internal sequence number in LINEITEM.

    Do not try and store a sequence for your lineitem gapless.  It is false.

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