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Oracle Forms Trigger执行顺序【转】

原创 Linux操作系统 作者:dowsonvx 时间:2009-04-24 15:12:20 0 删除 编辑
Oracle Forms Trigger执行顺序



Doc ID: 
Note:61675.1

Subject: 
Trigger Execution Sequence in Oracle Forms

Type: 
BULLETIN

Status: 
PUBLISHED




Content Type: 
TEXT/X-HTML

Creation Date: 
21-APR-1997

Last Revision Date: 
08-MAR-2005
(V45) Trigger Execution Sequence in Forms 4.5
=============================================

Introduction
------------

This document lists the order in which triggers fire in Oracle Forms 4.5:
o The first column, Action, describes the function to be performed
  (e.g. deleting a record).
o The second column, Trigger Firing Order, describes the order
  in which triggers fire after a function is performed.
o The third column, Level, describes the level (form, block, item)
  at which the trigger fires. This was accomplished by creating a form
  with all the triggers invoked. If a trigger could fire at all levels,
  it was included at all levels. Such a trigger fires at the lowest level
  at which it is defined.

Key triggers and triggers which fire via buttons or check boxes are
not included.

This bulletin does not cover every contingency and covers only the
most commonly used actions.

Action Trigger Firing Order Level
------ -------------------- -----
Runform. 1. Pre-Logon Form
  2. On-Logon Form
  3. Post-Logon Form
  4. Pre-Form. Form
  5. When-Create-Record Block
  6. Pre-Block Block
  7. Pre-Record Block
  8. Pre-Text-Item Item
  9. When-New-Form-Instance Form
  10. When-New-Block-Instance Block
  11. When-New-Record-Instance Block
  12. When-New-Item-Instance Item

***********
Enter Query 1. Post-Text-Item Item
  2. Post-Record Block
  3. When-Clear-Block Block
  4. When-New-Record-Instance Block
  5. When-New-Item-Instance Item

Note: If you define the Key-ENTQRY trigger, this is the only trigger
  which fires in an Enter Query situation.


*****************
Execute Query
After Enter Query 1. Pre-Query Block
  2. Pre-Select Block
  3. On-Select Block
  4. When-Clear-Block Block
  5. Post-Select Block
  6. On-Fetch Block
  7. On-Close Form
  8. When-Clear-Block Block

Note: If you define the Key-EXEQRY trigger, this is the only trigger
  which fires in an Execute Query situation.


*************
Execute Query
Without Enter
Query 1. Post-Text-Item Block
  2. Pre-Query Block
  3. Pre-Select Block
  4. On-Select Block
  5. Post-Select Block
  6. On-Fetch Block
  7. On-Close Form
  8. When_Create_Record Block
  9. Pre-Record Block
  10. Pre-Text-Item Item
  11. When-New-Record-Instance Block
  12. When-New-Item-Instance Item


****
Exit 1. Post-Text-Item Item
  2. Post-Record Block
  3. Post-Block Block
  4. Post-Form. Form
  5. On-Rollback Form
  6. Pre-Logout Form
  7. On-Logout Form
  8. Post-Logout Form


**************
Next Field and
Previous field 1. When-New-Item-Instance Item


***************
Next Record and
Previous Record 1. When-New-Record-Instance Block
  2. When-New-Item-Instance Item

**************
Next Block and
Previous Block 1. Post-Text-Item Item
  2. Post-Record Block
  3. Post-Block Block
  4. When-Create-Record Block
  5. Pre-Block Block
  6. Pre-Record Block
  7. Pre-Text-Item Block
  8. When-New-Block-Instance Block
  9. When-New-Record-Instance Block
  10. When-New-Item-Instance Form


*******************
Records Are Queried 1. Post-Query Block
  2. Post-Change Block
  3. Post-Change Item
  4. Post-Change Block
  5. Post-Change Block
  Go back to Post-Query

NOTE: This cycle is repeated for each record retrieved.


**********************
No Records Are Queried 1. When-New-Record-Instance Block
  2. When-New-Item-Instance Item

NOTE: To observe this Trigger Firing Order:
  a. Enter a query.
  b. Enter a nonexistent record.
  c. Execute the query.

  The two triggers listed above, the Enter Query triggers, and
  the Execute Query triggers fire.


*************
Create Record 1. Post-Change Block
  2. When-Validate-Item Block
  3. Post-Text-Item Block
  4. When-Validate-Record Block
  5. Post-Record Block
  6. Post-Block Block
  7. On-Savepoint Form
  8. Pre-Commit Form
  9. Pre-Insert Block
  10. On-Insert Form
  11. Post-Insert Block
  12. Post-Forms-Commit Form
  13. On-Commit Form
  14. Post-Database-Commit Form
  15. Pre-Block Block
  16. Pre-Record Block
  17. Pre-Text-Item Block
  18. When-New-Item-Instance Form


*************
Update Record 1. When-Database-Record Block
  2. Post-Change Block
  3. When-Validate-Item Block
  4. Post-Text-Item Block
  5. When-Validate-Record Block
  6. Post-Record Block
  7. Post-Block Block
  8. On-Savepoint Form
  9. Pre-Commit Form
  10. Pre-Update Block
  11. On-Update Block
  12. Post-Update Block
  13. Post-Forms-Commit Form
  14. On-Commit Form

  Here the transaction is complete and one record added.

  15. Post-Database-Commit Form
  16. Pre-Text-Item Block
  17. When-New-Item-Instance Form

NOTE: To observe this Trigger Firing Order:

  a. Execute a query.
  b. Change a value.
  c. Choose Action->Save from the menu.
  d. Record the triggers from that point.


*************
Delete Record 1. On-Lock Block
  2. When-Remove-Record Block
  3. Post-Change Block
  4. Post-Change Block
  5. Post-Change Block
  6. Post-Change Block
  7. Post-Change Block
  8. Post-Change Block
  9. Post-Change Item
  10. Post-Query Block
  11. Post-Text-Item Block
  12. Post-Record Block
  13. Pre-Record Block
  14. Pre-Text-Item Block
  15. When-New-Record-Instance Block
  16. When-New-Item-Instance Form

NOTE: To observe this Trigger Firing Order, delete a detail record.

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