LOGO BC430 ABAP Dictionary Unit 8 Search Help 、 Unit 7 Views

ABAP 楊子青 Dic Search Help

ABAP 楊子青 Dic2-3 Input Help Requirements

ABAP 楊子青 Dic2-4 Search Help (1) (2) 決定由哪個 table 或 view 找資料

ABAP 楊子青 Dic2-5 Search Help

ABAP 楊子青 Dic2-6 Selection Method of a Search Help

ABAP 楊子青 Dic2-7 Description of the Dialog Behavior

ABAP 楊子青 Dic2-8 Interface of a Search Help

ABAP 楊子青 Dic2-9 Search Help IMPORT (IMP) ： screen 上的值會 作為一個限制條 件，加入到 search help 中 EXPORT (EXP) ： 哪些欄位需要 返回值

ABAP 楊子青 Dic2-10 Search Help search help 可放至 1. Table field 2. check table 3. data element

ABAP 楊子青 Dic2-11 Search Help 若有好幾個 search help ，由左而右決 定優先順序 1 2 3

ABAP 楊子青 Dic2-12 Search Help 2. Collective search help ： 把幾個 elementary search help 組合在一起

ABAP 楊子青 Dic2-13 View as Selection Method of a Search Help

ABAP 楊子青 Dic Views

ABAP 楊子青 Dic2-15 Example: Structure of a View

ABAP 楊子青 Dic2-16 (1) Join Condition 多餘的欄位

ABAP 楊子青 Dic2-17 (2) Field Selection (Projection)

ABAP 楊子青 Dic2-18 (3) Selection Condition

ABAP 楊子青 Dic2-19 How are Tables linked to Views?

ABAP 楊子青 Dic2-20 Structure of the View

ABAP 楊子青 Dic2-21 Data Selection with Views (Open SQL)

ABAP 楊子青 Dic2-22 Data Selection with Views  You would get the same result using an Inner Join: SELECT C~CARRID C~CARRNAME P~CONNID P~CITYFROM P~CITYTO F~FLDATE F~SEATSMAX F~SEATSOCC INTO TABLE ITAB_FLIGHTS FROM ( SCARR AS C INNER JOIN SPFLI AS P ON C~CARRID = P~CARRID ) INNER JOIN SFLIGHT AS F ON F~CARRID = P~CARRID AND F~CONNID = P~CONNID WHERE CITYFROM IN SO_CITYF AND CITYTO IN SO_CITYT AND SEATSOCC < F~SEATSMAX ORDER BY C~CARRID P~CONNID F~FLDATE.

ABAP 楊子青 Dic2-23 Inner and Outer Join

ABAP 楊子青 Dic2-24 The Different Types and Usage of Views  Database View  are implement an inner join  that is, only records of the primary table (selected via the join operation) for which the corresponding records of the secondary tables also exist are fetched.  Maintenance View  are implement an outer join  Data from several tables can be summarized in a maintenance view and maintained collectively via this view.  That is, the data is entered via the view and then distributed to the underlying tables by the system.

ABAP 楊子青 Dic Database Views

ABAP 楊子青 Dic2-26 Dynamic attachment of table fields in database views  You can include entire tables in database views.  In this case all the fields of the included table become fields of the view.  If new fields are included in the table or existing fields are deleted, the view is automatically adjusted to this change.  A new or deleted field is therefore automatically included in the view or deleted from it.

ABAP 楊子青 Dic2-27 Dynamic attachment of table fields in database views

ABAP 楊子青 Dic Maintenance Views  Data that is distributed on more than one table often forms a logical unit (application object)  The user usually is not interested in the technical implementation, such as the distribution of the data on several tables.  You should be able to display, change and create the data of such an application object together.  You can maintain complex application objects in a simple way using a maintenance view.  The data is automatically distributed on the underlying database tables.

ABAP 楊子青 Dic Maintenance Views

ABAP 楊子青 Dic2-30 Maintenance view