Working with Views in Software

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Working with Views
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Figure 8 13: Dialog box for choosing a view type. For the example, the database view is chosen. Select the radio button and click on the Continue icon. The system then displays the view maintenance screen as shown in Fig. 8 14.
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Figure 8 14: Database view maintenance screen. On this screen, there is header information and three table boxes: one for specifying the tables in the view, another one specifying the join conditions, and a third one for selecting the fields for the view. You have to maintain the following input fields: Enter a short text describing the purpose or contents for the view. In the Tables box, enter the names of the tables which are to be related for creating the view. Next, in the Join conditions box, enter the fields names in which the relation between the tables is based. Then in the View fields box, select the fields you wish to appear in your view. To select the fields, click on the Table Fields button on the application toolbar. The system first displays the tables previously entered. To display the available fields, select a table by double clicking on it, then click on the check boxes next to the field names. Finally, press the Copy button to transfer the selected 282
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Working with Matchcode Objects fields to the View fields box. Optionally, you can restrict the selection by using the function Goto Selection condition. In the selection condition box, you can enter the following fields: Table: Table name Field name: Name of the field Operator: LK, GT, GE, NE, EQ, LE, LT, LIKE, NOT LIKE Comparison value: Constant value for the comparison AND/OR: Logical operator to use with two lines of the selection condition Save your view definition and then Activate the view. Upon Activating the view in the dictionary, it is automatically created in the underlying database system, as long as the tables also exist in the database. If there are errors, the system displays the error log messages. Optionally, you can create some documentation for the view by selecting Goto Documentation from the menu. To display the table entries matching the view conditions from the view maintenance screen, select Utilities Display data. When you delete a view you not only delete the view definition in the ABAP dictionary but also you delete the view at the database level. To delete a view, in the initial ABAP dictionary screen, enter the name of the view in the Object name field, having the radio button Views selected, and then click on the Delete icon on the application toolbar.
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Working with Matchcode Objects
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A matchcode is an aggregate database object which works like a special tool to help search for data records in the system. Matchcodes are particularly useful for searching when the key of a record is not known. A complete section on how users work with matchcodes and search helps was introduced in the section "Working with Matchcodes" in Chap. 5. Matchcodes require a two step definition: Define the matchcode object, including the relevant tables and fields which make up the matchcode, to be later used by the match code IDs. Define one or more matchcode IDs for a matchcode object. With the matchcode IDs, you define different search criteria combinations and the screen layout order, based on the information contained in the matchcode object.
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Case Study: Creating a Matchcode
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The following example illustrates the creation of matchcode objects. The new matchcode object will be named ZENR and will be based on tables UPROF (professors table) and UPERS (persons table), which are included in the standard SAP system for example and training purposes. To create matchcode objects, from the initial dictionary screen, select Utilities Matchcode objects Create. For the matchcode object, you have to enter a four character name complying with the customer name range, that is, starting with Z or Y. Select the Matchcode radio button and then click on the Create push button. Figure 8 15 shows an example of this screen.
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