Oracle trigger inserting updating deleting
The problem is that i couldn't figure it out how to determine these deleted or inserted records that sqlserver keep in temporary memory tables .for Oracle using :new.columnname or :old.columnname may refer to the same field value 'nr Topic' that has been updated rather than the newly inserted value.case of the first part of the code: If UPDATING(nr Topic) OR (IF nr Topic =:Topic) AND NOT (IF nr Topic =:Topic).seems to me not the same.. Until the transaction ends other sessions do not see changes made by the transaction. UPDATE blocks the rows it modifies), so other transactions updating the same rows have to wait till the locking transactions ends (COMMIT or ROLLBACK).
Thanks in Advance, bahaa As far as I know no such structures are available in Oracle. Briefly: transaction starts with the first executable sql statement and ends with COMMIT (confirmation) or ROLLBACK (cancellation).
Once a threshold is reached (say 1000 records), we flush the buffered data into audit table and reset the counter for further buffering.
And at last, as part of AFTER STATEMENT we flush any remaining data left in buffer.
This is because compound trigger in oracle 11g has a declarative section where one can declare variable to be used within trigger.
This common state is established at the start of triggering statement and is destroyed after completion of trigger (regardless of trigger being in error or not). SALARY IS NULL) ) THEN v_index := v_index 1; v_emp_changes(v_index).upd_dt := SYSDATE; v_emp_changes(v_index).upd_by := SYS_CONTEXT (' Now any changes in any field of employees will to be written in aud_emp table.
This would be a good starting point for your question (in sqlserver trigger I use inserted table/view for getting the row values, how to get these values in Oracle trigger?
) IF UPDATING(nr Topic) OR (IF 'nr Topic' Exist in Deleted records 'that have been deleted before' ) AND NOT (if 'nr Topic' Exist in inserted records 'that have been inserted before')Then....
Since each row update in employees table needs to make multiple inserts in the audit table, we should consider using a compound trigger so that batching of inserts can be performed. EMP_ID IS NULL) ) THEN v_index := v_index 1; v_emp_changes(v_index).upd_dt := SYSDATE; v_emp_changes(v_index).upd_by := SYS_CONTEXT (' : NEW. To do this, it will be needed to get the maximum value of salary in the ’employees’ table, and such calculation can be made in BEFORE STATEMENT section and stored in variable.As I see your posts, it seems to me you want to get the value of the nr Topic column.inserted and deleted seem to be structures which hold the row values in sqlserver.Hi Everybody, I tried to write an Oracle Trigger that has the same functionality of an Sql Server Trigger but i could not solve the Code of the 'IF Statment' .anyone help??The Trigger is: ============== CREATE TRIGGER TRG_Forum Posts ON Forum Posts FOR INSERT, UPDATE, DELETE AS SET NOCOUNT ON IF UPDATE(nr Topic) OR (EXISTS(select 1 from deleted) AND NOT EXISTS(select 1 from inserted)) BEGIN ...........
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My version is: ========================================= DECLARE It Exist0 INTEGER := 0; It Exist1 INTEGER := 0; -- PRINT 'column nr Topic affected by inserted, updated or delete' nr_topic INT; cnt INT; nr_lastpost INT; TYPE REF_cur_topics IS REF CURSOR; cur_topics REF_cur_topics; BEGIN IF DELETING THEN SELECT 1 INTO It Exist0 FROM DUAL; ELSIF INSERTING THEN SELECT 1 INTO It Exist1 FROM DUAL; IF UPDATING (nr Topic) OR( It Exist0 ! Thanks in Advance, Bahaa Hi, I do not think it is good to publish here sqlserver code as it seems nobody here knows its meaning.