before trigger

Similar Questions

• before trigger with four cards PXI-6115

  Hello

  I have a PXI-1010 chassis with four cards PXI-6115, labeled boards 3, 4, 5, 6, installed in it.  Each of these cards has 4 analog inputs (BNC inputs).  In my current system, all four boards fire off the coast of the entrance on first 3 analog.  I'm using an analog trigger mounted on Board 3, which then triggers a trigger digital beginning on the boards, 4, 5 and 6.

  Now, I would be able to take samples before firing.  I worked on this for a while and that seems to happen is that 3rd Chess Board properly triggers and takes samples of relaxation before, but plates 4, 5 and 6 are somehow trigger too late or early or something - they never record my test signal input of.

  Can someone help me understand where I'm going wrong here?  I enclose my VI and also a picture of the important part of my block diagram.

  Thank you!

  It could be that you connect the number of samples per channel in the clocks of the sample for tables 4, 5 and 6. This will ensure that the task creates a buffer on your PC that is large enough to accommodate all the samples you want to read.

  Also, why did you remove the structure of sequence? You need to ensure that the advice of slaves were armed in front of the master bedroom.

  Here is a link to an example similar to what you're trying to do. This example acquires the data at different speeds on different boards, but it seems that everything is identical to what you are doing. I think it might be useful for you: https://decibel.ni.com/content/docs/DOC-11698

  Jeremy P.

• Query before trigger problem

  Hello
  I have a datablock in the form that is based on a table of DB. There are a few searchable fields in the block, including the start and end dates. If I don't use no trigger prior request, reviews are interviewed very well. But I want to make a selection of beach between start and end_date fields. So I created a trigger before query and set with a new_where_clause all my query_fields and set it as DEFAULT for my DB block.
  
  SET_BLOCK_PROPERTY (block_id, default_where, where_clause);
  
  But when I see the toad session request, the query looks like
  
  WHERE (Champ_1 =: 1) and Champ_1 =: 1
  
  This means that its running the default where clause on the block and the clause of new_where at the same time.
  I checked the form and I did not all calls to execute the query.
  What can be the problem?

  Two possibilities: either concatenate values in the WHERE alike

  SET_BLOCK_PROPERTY('BLOCK', ONETIME_WHERE, 'FIELD LIKE '''||:BLOCK.ITEM||'%''');
  

  or set the values of request for items within a control block, as:

  :CONTROLBLOCK.ITEM:=:BLOCK.ITEM;
  SET_BLOCK_PROPERTY('BLOCK', ONETIME_WHERE, 'FIELD LIKE :CONTROLBLOCK.ITEM');
  

• Before Insert TRIGGER to create partitions problem

  Hello
  
  I m having a problem with the following situation in Oracle 8i:
  
  I have a table TEST_TABLE, which is divided by the beach with a DATE column. The idea is to have a partition for each month, so the HIGH_VALUE of partitions is always the first day of the month following that represents the partition.
  
  I created a BEFORE TRIGGER INSERT on the table TEST_TABLE, which tests if the partition for the month of registration which is being inserted exists and, in case it doesn´t, a PROC AUTONOMOUS_TRANSACTION is called to create the TRIGGER.
  
  Running the code below one can see that even if partitions are created as expected, when you try to insert a record with a date greater than the last partition for the first time, this error is returned:
  ORA-14400: inserted partition key exceeds plu legal partition key.
  
  Note that if you run the same statement again insert, it s inserted correctly on the partition that was created the first try.
  
  I´ll appreciate any help on this matter.
  
  code
  ----------------
  CREATE TABLE TEST_TABLE)
  IDENTIFICATION NUMBER,
  DATE OF THE DT
  )
  TABLESPACE USERS
  PARTITION BY RANGE (DT)
  (
  PART_B42009 PARTITION VALUES LESS THAN (TO_DATE ('2009-01-01 00:00:00 ',' YYYY-MM-DD HH24:MI:SS ',' NLS_CALENDAR = GREGORIAN '))
  LOGGING
  TABLESPACE USERS
  );
  /
  
  CREATE OR REPLACE PROCEDURE SP_ADD_PARTITION (TEST_TABLE P_DATE. DT % TYPE)
  IS
  PRAGMA AUTONOMOUS_TRANSACTION;
  V_STR VARCHAR2 (500);
  BEGIN
  
  V_STR: = 'ALTER TABLE TEST_TABLE ADD.
  || 'PARTITION BIRD | TO_CHAR ("P_DATE, ' YYYYMM")
  || ' VALUES LESS (TO_DATE ("')).
  || TO_CHAR (ADD_MONTHS (P_DATE, 1), "YYYY-MM"). '-01 00:00:00 ','
  || ((' SYYYY-MM-DD HH24:MI:SS "," NLS_CALENDAR = GREGORIAN "))';
  
  EXECUTE IMMEDIATE (V_STR);
  
  END SP_ADD_PARTITION;
  /
  
  CREATE OR REPLACE TRIGGER TR_B_I_R_TEST_TABLE
  BEFORE INSERTING
  ON TEST_TABLE FOR EACH LINE
  DECLARE
  NUMBER OF V_PARTITION_EXISTS;
  BEGIN
  
  IF: NEW. DT > = TO_DATE ('2009-01-01 00:00:00 ',' ' YYYY-MM-DD HH24:MI:SS) THEN
  
  IMMEDIATELY EXECUTE (' SELECT COUNT (1) ")
  || "Of all_tab_partitions atp'."
  || "WHERE atp.table_name ="table_test"'.
  || "AND the atp. Nom_partition =: v1 ')
  IN V_PARTITION_EXISTS
  WITH THE HELP OF "BIRD" | TO_CHAR(:NEW.) "DT,"YYYYMM";)
  
  IF V_PARTITION_EXISTS = 0 THEN
  
  DBMS_OUTPUT. Put_line ('Partition [' |]) 'BIRD ' | TO_CHAR(:NEW.) "DT,"YYYYMM"). does not exist!') ;
  DBMS_OUTPUT. Put_line ('creation..');
  SP_ADD_PARTITION (: NEW.) DT);
  DBMS_OUTPUT. Put_line ('success.');
  
  IMMEDIATELY EXECUTE (' SELECT COUNT (1) ")
  || "Of all_tab_partitions atp'."
  || "WHERE atp.table_name ="table_test"'.
  || "AND the atp. Nom_partition =: v1 ')
  IN V_PARTITION_EXISTS
  WITH THE HELP OF "BIRD" | TO_CHAR(:NEW.) "DT,"YYYYMM";)
  
  IF V_PARTITION_EXISTS = 1 THEN
  DBMS_OUTPUT. Put_line ("it s visible at this point..");
  ON THE OTHER
  DBMS_OUTPUT. Put_line ("it s not visible at this point..");
  END IF;
  
  ON THE OTHER
  
  DBMS_OUTPUT. Put_line ('Partition [' |]) 'BIRD ' | TO_CHAR(:NEW.) DT, "YYYYMM")
  || already exists! ") ;
  
  END IF;
  
  END IF;
  
  DBMS_OUTPUT. Put_line ('continues with insertion...");
  
  END TR_B_I_R_TEST_TABLE;
  /
  
  -Go to the low score
  INSERT INTO TABLE_TEST VALUES (1, TO_DATE ('2008-12-31 23:59:59 ',' YYYY-MM-DD HH24:MI:SS'));))
  
  -Returns the error on the first try
  INSERT INTO TABLE_TEST VALUES (2, TO_DATE ('2009-01-01 00:00:01 ',' YYYY-MM-DD HH24:MI:SS'));))
  
  ----------------

  It is the use of the pragma AUTONOMOUS TRANSACTION. Your current transaction cannot see the result of this DOF since it occurs outside of the current transaction. The clue is in the name.

  Of course, you cannot run the DDL in a trigger without use of this pragma, so you're pretty much stuck. There is a solution in 11g, but that will not help you. Unfortunately, your only option is to pre-create the partitions required in front of the need. For example, you might have a DBMS JOB to create a partition for the next month, which takes place the last day of each month (or logical date of company).

  Cheers, APC

  blog: http://radiofreetooting.blogspot.com

• Acquisition of samples before

  Hello

  I use a PCI-6602 card to record the time of incoming pulses. I would like to add a trigger line so that my program will retain the value data of 20us pulse before and after the outbreak. I tried to use a trigger to armstart, but I only managed to configure to start recording after this trigger impulses, and if I don't get the before trigger pulses. I also tried to set up a relaxing instead stop: I read pulse time and ignore data prior to 20, and when the trigger comes I let the program run for 20 microseconds. The problem with that is that, being new to LabView, I did not understand how exactly to do this kind of buffer that will reject the older data. I looked at a node of feedback, set to return only the samples after a number of iterations of my acquisition of data earrings, but of course, that returns only the oldest data. I also feel that using this method of stop-trigger seems a little roundabout. I have create a new task for the trigger channel, and I fear that this may slow down my program because I need to run continuously (I want data surrounding several triggers), and it seems unnecessary to re-create the task each time. Any suggestions? Is there a simpler way that I have not yet thought to?

  Thanks for your help!

  Kamna

  These express vi is known to be ineffective.  All this works only to save the last 20 values.  Hmmmm OK I have attached a mod of your vi who works as a buffer and operates on data without conversion of type and the place (should be orders of magnitude faster) I also have initiallized the SR and FBN and fixed a bit of logic on the counter

• What is the difference in coverage and coverage before holes?

  Hi all

  Anyone know what is the difference in coverage and coverage before holes?

  I can find the doc of Cisco is:

  «cover holes are displayed as alarms, coverage before holes are displayed as events»

  "The gaps or the 'holes' in coverage of radio access point are the main cause of poor audio. Detected on the client before hole events coverage provides continuous monitoring to ensure that the customer is informed about the existence of these cover holes. »

  It seems to cover before the hole is detected customer, cover hole is detected AP? However, I'm not sure.

  Another question is what trap includes alarm coverage before hole in the dictionary of alarm and event of WCS 7.0? I can only find several cover traps:

  LRADIF_COVERAGE_PROFILE_FAILED

  LRADIF_COVERAGE_PROFILE_PASSED

  However, two of them have no say if for hole cover or the front cover. Don't know what trap will be sent by the WCS to a notification receiver configured to indicate an event coverage before hole, for example:

  Minor - X - 13: 27:52 16/09/10 cisco-WCS WCS SNMP <$2>0x07 da 09 10 0d 1 b 2 c b 05 2-0 at 00: 10.1.1.12: coverage before hole reported by 00:1f:3 c: cd:c8:2 detected by 10.1.1.12: coverage before hole reported by ' 00:1f:3 c: cd:c8:2 has ' found on the controller

  Your valuable contribution is very much appreciated!

  Hello!

  A front cover is when a client remains for 5 seconds in a coverage hole. In other words, when a customer is heard for a while to wrong signal and is not roaming, it must mean that this area is a coverage hole. This event is informational

  A coverage hole event is when several clients are pasted into the same hole in coverage. Then the AP will increase its power if possible.

  WLC waits for several clients before trigger power avoids crazy behaviors of increasine/reduction/increase/decrease.

  The settings for cover hole events can be configured on the part of MRR of WLC (number of customers, etc...)

  Nothing is configurable for cover before hole because it's just '1 customer only reached the hole in coverage thresholds '.

  Hope that clarifies.

  Nicolas

• County of trigger

  Hi all

  I use

  Connected to Oracle Database 11g Express Edition Release 11.2.0.2.0

  I use the Oracle HR schema

  I'm learning triggers

  This is my table script.

  CREATE TABLE EMPLOYEES_COPY

  AS

  SELECT * FROM EMPLOYEES

  CREATE TABLE EMPLOYEE_LOG)

  VARCHAR2 (30) WHO,.

  ON WHAT DATE).

  ALTER TABLE EMPLOYEE_LOG

  ADD (ACTION VARCHAR2 (2000))

  CREATE OR REPLACE PACKAGE STATE_PACKAGE

  AS

  NUMBER OF ROWS_CHANGED;

  END STATE_PACKAGE;

  CREATE OR REPLACE TRIGGER BIUD_EMPLOYYES_COPY

  BEFORE INSERT OR UPDATE OR DELETE

  ON EMPLOYEES_COPY

  BEGIN

  STATE_PACKAGE. ROWS_CHANGED: = 0;

  END;

  CREATE OR REPLACE TRIGGER BIUDFER_EMPLOYEES_COPY

  BEFORE INSERT OR UPDATE OR DELETE

  ON EMPLOYEES_COPY

  FOR EACH LINE

  DECLARE

  L_ACTION. EMPLOYEE_LOG % ACTION TYPE;

  BEGIN

  IF THE INSERTION

  L_ACTION: = "INSERT."

  ELSIF UPDATE THEN

  L_ACTION: = 'UPDATE ';

  ELSIF DELETION THEN

  L_ACTION: = 'DELETE ';

  ON THE OTHER

  RAISE_APPLICATION_ERROR ("-20001,' YOU SHOULD NEVER GET THIS ERROR.");

  END IF;

  STATE_PACKAGE. ROWS_CHANGED: = STATE_PACKAGE. ROWS_CHANGED + 1;

  IF UPDATING ('SALARY') THEN

  L_ACTION: = L_ACTION | ' - ' || "WAGES FOR EMPLOYEE_ID" | : OLD. EMPLOYEE_ID |

  "PAST". : OLD. SALARY | « À » || : NEW. SALARY;

  END IF;

  INSERT INTO EMPLOYEE_LOG(WHO,ACTION,WHEN) VALUES (USER, L_ACTION, SYSDATE);

  END;

  SELECT * FROM EMPLOYEE_LOG

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

  CREATE OR REPLACE TRIGGER AIUD_EMPLOYEES_COPY

  AFTER INSERT OR UPDATE OR DELETE

  ON EMPLOYEES_COPY

  DECLARE

  L_ACTION. EMPLOYEE_LOG % ACTION TYPE;

  BEGIN

  IF THE INSERTION

  L_ACTION: = STATE_PACKAGE. ROWS_CHANGED | "AIRPLANES" | "INSERTED";

  ELSIF UPDATE THEN

  L_ACTION: = STATE_PACKAGE. ROWS_CHANGED | "AIRPLANES" | 'DAY '.

  ELSIF DELETION THEN

  L_ACTION: = STATE_PACKAGE. ROWS_CHANGED | "AIRPLANES" | 'DELETED ';

  ON THE OTHER

  RAISE_APPLICATION_ERROR ("-20001,' YOU SHOULD NEVER GET THIS ERROR.");

  END IF;

  INSERT INTO EMPLOYEE_LOG(WHO,ACTION,WHEN) VALUES (USER, L_ACTION, SYSDATE);

  END;

  UPDATE EMPLOYEES_COPY SET SALARY = SALARY * 1.05

  WHERE DEPARTMENT_ID = 20

  SQL > SELECT * FROM EMPLOYEE_LOG;

  WHO IN ACTION

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

  UPDATE 23/05/2015 9 HR

  UPDATE 23/05/2015 9 HR - SALARY FOR EMPLOYEE_ID 201 PASSED UNDER 15015 TO 15765.75

  UPDATE 23/05/2015 9 HR - SALARY FOR EMPLOYEE_ID CHANGED 6930 AT 7276.5 202

  HR 23/05/2015 9 2 HAVE BEEN UPDATED

  Please let me know if my understanding is corect

  First, we declare a variable ROWS_CHANGED overall in a package specification, so that it remains

  throughout the session.

  Then, we create pre-writ BIUD_EMPLOYYES_COPY count zero STATE_PACKAGE to the global variable. ROWS_CHANGED: = 0;

  Then the front trigger BIUDFER_EMPLOYEES_COPY is triggered, it will increase the variable count ROWS_CHANGED

  
  

  She will insert in EMPLOYEE_LOG details table.

  
  

  After that the next trigger than aiud_employees_copy fires

  It is triggered after the lines changed

  
  

  
  

  Please let me know that my interpretation is correct.

  
  

  I have a doubt

  
  

  Y at - it any guarantee that trigger BIUD_EMPLOYYES_COPY will be triggered before BIUDFER_EMPLOYEES_COPY

  
  

  Thank you

  Hello

  old version

  11.1 http://docs.oracle.com/cd/B28359_01/appdev.111/b28370/triggers.htm#LNPLS99985

  Classification of triggers

  A relational database does not guarantee the order of the rows processed by an SQL statement. Therefore, don't create triggers that depend on the order in which the rows are processed. For example, do not assign a value to a package variable overall in a trigger line if the current value of the global variable depends on the line being processed by the trigger of the line. In addition, if the package global variables are updated within a trigger, then it is best to initialize these variables in a BEFORE trigger of the statement.

  newer version

  11.2 PL/SQL triggers

  Design of trigger instructions

  • Use triggers to ensure that whenever a specific event occurs, all the necessary actions are completed (regardless of which user or the application issues the statement of release). For example, using a trigger to ensure that whenever someone updates a table, the log file is updated.
  • Don't create triggers that duplicate the functionality of database. For example, do not create a trigger to reject invalid data if you can do the same thing with the constraints (see "How triggers and constraints are different").
  • Don't create triggers that depend on the order in which an SQL statement treats the lines (which can vary). For example, do not assign a value to a package variable overall in a trigger line if the current value of the variable depends on the line being processed by the trigger of the line. If a trigger updates the package global variables, initialize variables in a BEFORE trigger of the statement.
  • Use BEFORE rank of triggers to change the line before writing data to disk.
  • Use AFTER rank of triggers to get the row ID for use in operations. A AFTER row trigger fires at the hearing of trigger results in ORA-2292. Note: AFTER line triggers are slightly more effective than the BEFORE rank of triggers. With BEFORE line triggers, data blocks are read first for relaxation, then for the triggering statement. With AFTER line triggers, data blocks are read only for relaxation.
  • If the statement to trigger a BEFORE trigger statement is a UPDATE or DELETE statement that is in conflict with a UPDATE statement that is running, then the database no atransparent ROLLBACK to SAVEPOINT and restarts the triggering statement. The database can do several times before the trigger statement to be completed successfully. Whenever the database restarts the trigger statement, the trigger fires. The ROLLBACK in SAVEPOINT does not cancel the changes made to the package variables that refers to the relaxation. To detect this situation, include a counter variable in the package.
  • Don't create recursive triggers. For example, do not create one AFTER UPDATE trigger that emits a UPDATE statement on the table on which the trigger is defined. The trigger is activated recursively until it is short-term memory.
  • If you create a trigger includes a statement that accesses a remote database, then put the exception handler for this statement in a stored subprogram and invoke the subprogramme of the trigger. For more information, see "Managing Remote exceptions".
  • Use DATABASE triggers wisely. They are triggered whenever any user database fires a trigger event.
  • If a trigger executes the following statement, the statement returns the owner of the trigger, not the user that updates the table:

    SELECT Username FROM USER_USERS;
    

  • Only triggers engaged the fire.

    A trigger is engaged, implicitly, after the CREATE TRIGGER statement that creates it succeeds. Therefore, the following statement can not fire the trigger it creates:

  CREATE OR REPLACE TRIGGER my_trigger AFTER CREATE ON DATABASE BEGIN NULL; END; /
  

• To allow for modular installation of applications with triggers on the same tables, create multiple triggers of the same type, rather than a single trigger that performs a sequence of operations. Each trigger sees the changes made by the triggers have already fired. Each trigger can see OLD and NEW values.

Has not changed in version 12.1 http://docs.oracle.com/database/121/LNPLS/triggers.htm#LNPLS2002

• ORA-04091 and composed the trigger

  Hi all, I have the following table:

  ID_PARTITION VARCHAR2 (20)

  ROLE_NOW VARCHAR2 (CHAR)

  DATE OF THE REMOVAL

  EDITION OF VARCHAR2 (3)

  DATE OF UPDATE_DATE

  If MOUNTING column is updated 'worthless', a trigger should update the UPDATE_DATE column with the value 'sysdate.

  I get the error ORA-04091 on the execution of the trigger. So I try to use the TRIGGER COMPOUND modifing the trigger existing as follow:

  CREATE OR REPLACE

  Tri_hot_active RELAXATION

  FOR the UPDATE OF the edition ON tab_informations

  COMPOUND OF TRIGGER

  v_partition VARCHAR2 (20);

  v_get VARCHAR2 (100);

  v_update_sql VARCHAR2 (1000);

  
  AFTER EACH ROW IS

  BEGIN

  dbms_output.put_line ('top');

  If: new.editing = 'no' THEN

  v_partition: =: old.partition_id;

  dbms_output.put_line ('v_partition =' | v_partition); -debug purpose

  dbms_output.put_line (' old v_update = ' |: old.update_date); -debug purpose

  v_update_sql: = "update tab_informations set = sysdate update_date where id_partition =" ' |: new.partition_id | "" ' ;

  dbms_output.put_line ('v_update_sql =' | v_update_sql); -debug purpose

  immediately run v_update_sql;

  end if;

  END AFTER EACH LINE;

  END tri_hot_active;

  /

  But I still get ORA-04091. Can you suggest me a solution?

  I'm working on 11 GR 2.

  Thank you

  Ste

  Now...

  you would do that in a BEFORE trigger rather than in AFTER

  and you just change the ': NEW ' values of the content that you want to use for the update

  HTH

• change of new values in trigger

  Hello
  With the help of Oracle 11 g R2.
  
  When you insert records into a table, I would like to replace some character with a space inside a type "AFTER DELETE or INSERT or UPDATE" character of trigger. However, when I compile the relaxation with the amendment of the code, I'm getting an ORA-04084: cannot change the NEWS values for this type of trigger. Is there a way to do this with this type of trigger? It is a trigger in our application, and we try to avoid adding a new trigger. Here is the code I tried to compile in the trigger.
  

  :NEW.FUND_NAME := trim(regexp_replace(replace(replace(:NEW.FUND_NAME, chr(13), null), chr(160), chr(32)), ' {2,}',' '));

  You need a new trigger. As the error says, you cannot change the data being inserted into or updated in an AFTER trigger. This is possible only in a BEFORE trigger.

  Now, you could potentially, modify the existing trigger to be a trigger BEFORE INSERT or UPDATE or DELETE then add any code you want. But apparently not what you were hoping to do.

  Justin

• Trigger_Insert or updated before the decimal block update value_oracle 11G

  Hi guys,.
  
  can someone help me please. How to update or insert before trigger of writing to block the decimal value.
  
  Scenario:
  for example the user entered value 1.22
  system should not allow to insert the value.
  
  If allows the user to enter in the whole number system only need another block.
  
  
  Thank you
  Sylvie has

  Why write a trigger if it can be managed by a check constraint?

  See below how to do.

  drop table test_table;
  
  create table test_Table (col number);
  
  alter table test_Table add constraint chk_col check( ((col - floor(col)) >= 1) or ((col - floor(col)) = 0));
  
  insert into test_table values (1)
  /
  insert into test_table values (1.1)
  /
  insert into test_table values (12)
  /
  insert into test_table values (1.01)
  /
  
  --Output
   drop table test_table succeeded.
  create table succeeded.
   alter table test_Table succeeded.
  1 rows inserted
  
  Error starting at line 9 in command:
  insert into test_table values (1.1)
  Error report:
  SQL Error: ORA-02290: check constraint (PURVESH.CHK_COL) violated
  02290. 00000 -  "check constraint (%s.%s) violated"
  *Cause:    The values being inserted do not satisfy the named check
  
  *Action:   do not insert values that violate the constraint.
  1 rows inserted
  
  Error starting at line 13 in command:
  insert into test_table values (1.01)
  Error report:
  SQL Error: ORA-02290: check constraint (PURVESH.CHK_COL) violated
  02290. 00000 -  "check constraint (%s.%s) violated"
  *Cause:    The values being inserted do not satisfy the named check
  
  *Action:   do not insert values that violate the constraint.
  

  I hope that this aligns with your condition.

  Kind regards
  P.

• Can we call a method before and after the operations of export in ADF 11 g

  Hello
  My problem is that I have to run a method before and after the export operation. Is this posible in ADF 11 g
  
  Kind regards
  Felix

  Hello

  in response to a post of similatr of yours, I said

  1 drop af:exportCollectionActionListener on a command button
  2. set the control knob to display = false
  3. in your Java code, call

  ActionEvent ae = new ActionEvent (button);
  AE.queue ();

  Everything you put in front

  ActionEvent ae = new ActionEvent (button);
  AE.queue ();

  will be like a before trigger fires, everything that follows as a trigger of post

  Frank

• How to trigger run a trigger

  Hai All
  
  I created a trigger
  
  Create or replace trigger T1
  
  Before inserting on Table_name
  
  For each line
  
  Start
  --
  --
  ---
  --
  end;
  
  And now, I inserted a line in the table how I see the shooting of a trigger
  
  Pls tell me with a small example
  
  
  Thanks and greetings
  
  Srikkanth

  Hello

  Check this example.

  SQL> create or replace trigger trg_emp
    2  before insert
    3  on emp
    4  for each row
    5  begin
    6  dbms_output.put_line('Trigger begins');
    7  dbms_output.put_line('Emp No is: '||:new.empno);
    8  dbms_output.put_line('Emp Name is: '||:new.ename);
    9  dbms_output.put_line('Emp HireDate is: '||:new.hiredate);
   10  dbms_output.put_line('Trigger ends');
   11  end;
   12  /
  
  Trigger created.
  
  SQL> insert into emp(empno,ename,hiredate)
    2  values(111,'Scott',sysdate);
  Trigger begins
  Emp No is: 111
  Emp Name is: Scott
  Emp HireDate is: 04-MAR-10
  Trigger ends
  
  1 row created.
  

  You have not explicitly call or execute a trigger. Once created the trigger runs automatically when this event occurs. In the above scenerio, I created before trigger Insert that is executed before the insert stmt is complete. If you look carefully all stmts in the trigger are printed first, and then you get * 1 row created * message.

  If triggers are called automatically when the specified event occurs.

  Check out the link for more details below:
  http://download.Oracle.com/docs/CD/B19306_01/AppDev.102/b14251/adfns_triggers.htm

  Twinkle

• Cannot engage in the trigger

  Hello
  
  I'm trying to work around the problem of changing table. I have a before trigger on tableA that calls a procedure which creates a global temporary table to store the: new updated on tableA values.
  
  Here is the code of the trigger and the code of procedure...
  
  Someone knows what the problem...
  
  Thank you
  
  create or replace trigger postaladdress_before
  before the insert or update
  TO ADDRESS1 ADDRESS2 ADDRESS3 ADDRESS4 ADDRESS5, ADDRESS6, ADDRESS7
  on tocpostaladdress
  for each line
  Start
  postcode_temp_work ('new',:new.c,: new.i,: new.) Address1,: new. Address2,: new. ADDRESS3,: new. ADDRESS4,: new. ADDRESS5,: new. ADDRESS6,: new. ADDRESS7);
  end;
  /
  
  
  Postcode_temp_work of procedure CREATE or REPLACE (tmode IN varchar2, pc in number, piin in numbers, pADDRESS1 IN varchar2, pADDRESS2 IN varchar2, pADDRESS3 IN varchar2, pADDRESS4 IN varchar2, pADDRESS5 IN varchar2, pADDRESS6 IN varchar2, pADDRESS7 IN varchar2)
  IS
  VC NUMBER: = pc;
  VI NUMBER: = piin;
  vaddress1 VARCHAR2 (40): = pADDRESS1;
  vaddress2 VARCHAR2 (40): = pADDRESS2;
  vaddress3 VARCHAR2 (40): = pADDRESS3;
  vaddress4 VARCHAR2 (40): = pADDRESS4;
  vaddress5 VARCHAR2 (40): = pADDRESS5;
  vaddress6 VARCHAR2 (40): = pADDRESS6;
  vaddress7 VARCHAR2 (40): = pADDRESS7;
  vtmode VARCHAR2 (40): = tmode;
  
  
  BEGIN
  dbms_output.put_line (VC);
  dbms_output.put_line (VI);
  dbms_output.put_line (vaddress1);
  
  Vtmode = 'new' IF THEN
  
  EXECUTE IMMEDIATE ' CREATE of TABLE TEMPORARY GLOBAL t_my_postcode_update (NUMBER c, I have NUMBER, Address1 VARCHAR2 (40) address2 VARCHAR2 (40), address3 VARCHAR2 (40), address4 VARCHAR2 (40), address5 VARCHAR2 (40), address6 VARCHAR2 (40), address7 VARCHAR2 (40))';
  
  EXECUTE IMMEDIATE (' insert into t_my_postcode_update (C, I, Address1, Address2, ADDRESS3 ADDRESS4 ADDRESS5, ADDRESS6, ADDRESS7) values ("'| vc |)) ''' ,''' || VI. ''',''' || vaddress1 | ''' , ''' || vaddress2 | ''','''|| vaddress3 | " ','' ' || vaddress4 | " ','' ' || vaddress5 | " ','' ' || vaddress6 | " ','' ' || vaddress7 | " ')') ;
  
  END IF;
  
  IF vtmode = "kill" THEN
  
  EXECUTE IMMEDIATE 'DROP TABLE t_my_postcode_update';
  
  END IF;
  
  
  END;
  /
  display errors;

  DDLS is auto-commettre, and you can not commit in a trigger, except if you use autonomous transactions

  Anyway, it isn't a good idea using DDL in triggers. You really need this?

• Help required on a trigger!

  Dear comrades,
  
  I'm new to triggers. I am trying to write a trigger but continually receive this error messages when activated.
  Here's the scenario...
  
  I have a table named "MY_USERS", which has the following structure:
  
  Name Null? Type the default value
  ----------------------------------------- -------- ---------------------------- --------------------------
  USERID NOT NULL VARCHAR2 (6)
  PASSWORD IS NULL NO VARCHAR2 (10)
  PWD_LASTMODIFIED_ON NOT NULL DATE SYSDATE
  
  Now, I want that whenever someone goes to change password in the field PASSWORD, only the PWD_LASTMODIFIED_ON field in the same particular line, should automatically update its value.
  
  I wrote the following for this trigger:
  
  
  CREATE OR REPLACE TRIGGER SMSUSER_PWD_LASTMODIFIED
  
  
  AFTER UPDATE THE PASSWORD ON SMSUSER
  
  
  FOR EACH LINE
  
  
  BEGIN
  
  
  UPDATE SMSUSER SET SMSUSER. PWD_LASTMODIFIED_ON = SYSDATE; + / * WHERE: new. PWD_LASTMODIFIED_ON & lt; & gt; : old. PWD_LASTMODIFIED_ON; * / +
  
  
  END;
  
  When I activate the commented WHERE clause in relaxation, there is an error generated on the PASSWORD field was updated. Considering that, in commenting on the article WHERE, when the PASSWORD field is changed, PWD_LASTMODIFIED_ON are updated in all lines.
  
  Kindly help!
  
  Concerning
  
  Published by: SKAAT on 1 Sep 2008 10:58

  You have need of an UPDATE statement. Just assign

  :new.pwd_last_modified_on := SYSDATE;
  

  It should also be a BEFORE trigger.

  BTW, you can format code with {noformat}

  {noformat} tags.                                                                                                                                                                                                                                                                                                                                                                                                                                        
  

• RelativeInitialX is valid for the externally triggered measures? NEITHER SMU 5122 64 MB per channel

  For example when you use the following commands

  niScope_ConfigureDigitial (with a positive delay)

  NiScope_SetAttributeViInt32 (NISCOPE_ATTR_FETCH_RELATIVE_TO to NISCOPE_VAL_READ_POINTER)

  followed by

  niScope_FetchBinary16 (loop to retrieve the data most wfmInfo)

  What will be the value of the wfmInfo.relativeInitialX before the external trigger?  It matches?  It is set to a number to indicate the outbreak did not appear until the trigger has been received and it then becomes accurate after receiving the trigger?

  I would use it to make a set FecthForever to date, but synchronized to an external trigger waveforms up to about a minute.

  It seems that the delay of release for the 5122 should be able to hande a minimum delay time of about 170 seconds (at the max rate of sampling more at lower rates), so the data I would need could all be borrowed buffers read-ahead externally triggered and properly after off-delay measurement.

  Thanks in advance for any advice.

  Greg

  In the case that you are extracting data from before trigger (extraction of data before a relaxation was produced., relativeInitialX will have the same value as absoluteInitialX.)

  Kind regards

  Nathan