ER/Studio - Embarcadero Technologies Product Documentation

USING ER/STUDIO > DEVELOPING THE PHYSICAL MODEL
Attachment Bindings tab
Bind an external piece of information, or attachment to the buffer pool. You can also remove an attachment from
an object, override an attachment binding’s default value, or change the position of a bound attachment. To
override the value of the attachment you have moved to the Selected Attachments grid, double-click the Value
field of the target attachment. ER/Studio opens the Value Override Editor or a list depending on the attachment
datatype. Attachments are created in the Attachments folder of the Data Dictionary. For more information, see
Attaching External Documents to the Data Model.
Creating and Editing DataBases
Databases are DB2 structures such as collections of tables with associated indexes, as well as the tablespaces and
index spaces that contain them. Using databases for administration, you can limit access to the data in the database
in one operation, or give authorization to access the data as a single unit.
When you create a database the following tasks are performed:
• System catalog tables required by the database are setup.
• The database recovery log is allocated.
• The database configuration file is created and the default values are set.
• The database utilities are bound to the database.
Before creating the database, ensure you have considered the contents, layout, potential growth and usage.
The following database platforms support database creation:
• IBM DB2 for OS/390 5.x and 6.x
• IBM DB2 for z/OS 7.x, 8.x, and 9
NOTE: The Database Wizard and Database Editor share the same options, except for Attachment
Bindings options which are present only in the editor.
Add a Database
1 In the Data Model Explorer, expand a physical model, right-click the Databases node, and then click New
Database.
2 Complete the Database Wizard and then click Finish to create the database.
TIP: Once you have created the auxiliary table, you can edit it by right-clicking the auxiliary table you
want to change, and then clicking Edit Auxiliary Table.
The following describe options that require additional explanation:
Name & Type page/tab
Name the database and specify the type. The database cannot already exist on the current server. The name
must not start with DSNDB, unless it is a workfile database and must not start with DSN followed by five digits.
Select WorkFile Database (AS WORKFILE) if the database operates in a data sharing environment and you are
creating a database that will be used for purposes such as managing the data of temporary tables, storing
intermediate SQL results, created global and temporary tables. If you choose to create a WorkFile Database,
you must also specify the member or DB2 subsystem that can use the workfile. Only one member of the data
sharing group can use this workfile.
Option page/tab
To make the database easier to manager, keep work files in a separate buffer pool.
EMBARCADERO TECHNOLOGIES > ER/STUDIO® 8.0.3 USER GUIDE 180