zoukankan      html  css  js  c++  java
  • Trigger Execution Sequence in Oracle Forms

    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.

  • 相关阅读:
    。。。剑指Offer之——用两个栈实现队列。。。
    。。。剑指Offer之——从尾到头打印链表。。。
    。。。剑指Offer之——替换空格。。。
    。。。剑指Offer之——二维数组中的查找。。。
    。。。归并排序。。。
    。。。快速排序。。。
    。。。冒泡排序。。。
    。。。选择排序。。。
    。。。Shell排序。。。
    Activiti学习笔记2 — HelloWorld
  • 原文地址:https://www.cnblogs.com/quanweiru/p/3433834.html
Copyright © 2011-2022 走看看