|
Topics: |
When the server accesses a data source, it interprets the data stored there based on instructions in a synonym that you create, which describes the structure of the data source and the server mapping of the VSAM data types.
|
How to: |
|
Reference: |
Synonyms define unique names (or aliases) for each VSAM file or view that is accessible from the server. Synonyms are useful because they hide the underlying data source location and identity from client applications. They also provide support for extended metadata features of the server, such as virtual fields and additional security mechanisms.
Using synonyms allows an object to be moved or renamed while allowing client applications to continue functioning without modification. The only modification required is a redefinition of the synonym on the server. The result of creating a synonym is a Master File that represents the server metadata.
The Applications page opens.
The Connect to Data page opens.
Depending on the type of adapter you chose, one of the following options appears on the context menu.
The button may be labeled Next, Create Synonym, Create Base Synonyms, Create Cluster Synonym, or Update Base Synonyms.
The synonym creation process for most adapters has been consolidated so that you can enter all necessary parameters on one page. However, for some adapters such as LDAP, you must click Next buttons until you get to a page that has a Create Synonym button.
The synonym is created and added under the specified application directory.
Note: When creating a synonym, if you choose the Validate check box (where available), the server adjusts special characters and checks for reserved words. For more information, see Validation for Special Characters and Reserved Words.
The following list describes the parameters for which you will need to supply values, and related tasks you will need to complete in order to create a synonym for the adapter. These options may appear on multiple panes. To advance from pane to pane, click the buttons provided, ending with the Create Synonym button, which generates the synonym based on your entries.
Under File System Selection, choose one of the following options:
In the input boxes provided, enter a PDS name preceded by a double slash (//) and a Member name containing the location of the COBOL FD source. If you wish, you can filter the member name using a wildcard character (%).
or
In the input boxes provided, type a Directory name to specify the HFS location that contains the COBOL FD and File name and File extension. If you wish, you can filter the file and extension using a wildcard character (%).
The Create Synonym pane (Step 2 of 2) opens.
If selected, the filtered COBOL definition is displayed at the top of the pane.
Enter the following parameters, as required:
Select the Validate check box if you wish to convert all special characters to underscores and perform a name check to prevent the use of reserved names. (This is accomplished by adding numbers to the names.) This parameter ensures that names adhere to specifications. See Validation for Special Characters and Reserved Words for more information.
When the Validate option is unchecked, only the following characters are converted to underscores: '-'; ' '; ' \'; '/'; ','; '$'. No checking is performed for names.
Select the Make unique check box if you wish to set the scope for field and group names to the entire synonym. This ensures that no duplicate names are used, even in different segments of the synonym. When this option is unchecked, the scope is the segment.
Optionally, select Customize COBOL FD conversion options to customize how the COBOL FD is translated. If you do not select the check box, default translation settings are applied.
For more information, see Customization Options for COBOL File Descriptions.
Select an application directory. The default value is baseapp.
If you have tables with identical table names, assign a prefix or a suffix to distinguish them. For example, if you have identically named human resources and payroll tables, assign the prefix HR to distinguish the synonyms for the human resources tables. Note that the resulting synonym name cannot exceed 64 characters.
If all tables and views have unique names, leave the prefix and suffix fields blank.
This option provides data portability between servers by enabling processing of data loaded in different encoding systems.
Click the Extended data format attributes check box to display the Codepage option.
In the input box provided, enter the code page of the stored data. Your entry is added to the Master File of the generated synonym.
Note: The code page you specify here must one for which you have requested a customized code page conversion table as part of your NLS configuration. If you have not already requested a conversion table for the designated code page, you can do so now. On the Web Console menu bar, click Workspace, then Configuration, and choose NLS under General settings. The NLS Configuration Wizard opens. Click Customize code page conversion tables and select the check box for the code page you wish to use. Click the Save and Restart button to implement your new setting.
To specify that this synonym should overwrite any earlier synonym with the same fully qualified name, select the Overwrite existing synonyms check box.
Note: The connected user must have operating system write privileges in order to recreate a synonym.
Create Synonym parameters
This column displays the names that will be assigned to each synonym. To assign different names, replace the respective displayed values. You have these additional options:
Once you have created a synonym, you can right-click the synonym name in the Adapter navigation pane of either the Web Console or the Data Management Console to access the available options.
For a list of options, see Synonym Management Options.
| WebFOCUS | |
|
Feedback |