Add User-Defined Teradata Functions
You can use the Teradata Function Editor to create and maintain the user-defined functions in a Teradata physical model.
To add user-defined Teradata functions
- Click Functions on the Model menu.
The Teradata Function Editor opens.
- Select a function and work with the following options:
Note: Click New
on the toolbar to create a new function. Use the Enter filter text text box to filter a very large list of functions to quickly locate the one you want to work with.- Name
Specifies the name of the function.
- Database
Specifies the database or user.
- Type
Specifies the type of the function. Select from the drop-down list. Valid values are: Model Level or Table Level.
- Function Type
Specifies the function type. Select from the drop-down. Valid values are Scalar or Table.
- Enabled
Specifies if the function is enabled or not.
- Use Replace Syntax
Lets you select whether Forward Engineering uses the REPLACE command instead of the CREATE command.
- Attach To New
Specifies if upon creating a new (table-level only) table, this script will automatically be attached to it.
- Generate
Generates DDL for this object during Forward Engineering.
- Generate As Pre-Script
Specifies whether you want to generate DDL as pre-script. Valid values are Post Creation and Pre Creation.
- Complete the following fields on the General tab:
- Function Type
Specifies the function type. Select from the drop-down. Valid values are Scalar or Table.
- Specific Name
Specifies the specific function type selected in the previous field.
- Return Data Type
Specifies the data type for the value returned by the function. Distinct and structured UDT's are valid for scalar function only.
Note: This property only displays if the function type is set to scalar.
- Character Set Type
Specifies the character set type.
Note: This property only displays if the function type is set to scalar.
- Return Cast Data Type
Specifies casting from data type.
Note: This property only displays if the function type is set to scalar.
- Return Cast User Defined Type
Specifies the data-type/domain casting from.
Note: This property only displays if the function type is set to scalar.
- Return Cast Character Set Type
Specifies the character set type casting from.
Note: This property displays only if the function type is set to scalar.
- Return Type
Specifies the data-type/domain that will be returned.
Note: This property only displays if the function type is set to scalar.
- Return Table Definition (Teradata Version 12 only)
Defines a reference to a table that will define the table that the function will return.
Note: This property only displays if the function type is set to table.
- Return Table Varying Columns (Teradata Version 12 only)
Defines a reference to a table that will define the varying columns that the function will return.
Note: This property only displays if the function type is set to table.
- Work with other tabs in the editor to access additional design features, for example:
- Add or edit parameters for the selected function on the Parameters tab.
- Work with data access features for the selected function on the Options tab.
- Add a full path for source files for the selected function on the Source Files tab.
- Add external files for the selected function on the External tab.
- Edit the SQL code related to the selected function on the Code tab.
- Display fully expanded code that may be shown as code fragments or partial routines on other tabs, on the Expanded tab.
- Associate permissions with the selected function on the Permission tab.
- Change the object creation order in the Object Creation Order tab.
- (Optional) Click the Comment tab and enter any comments that you want to associate with the object.
- (Optional) Click the UDP tab to work with user-defined properties for the object.
- (Optional) Click the Notes tab to view and edit user notes.
- Click Close.
The Teradata Function Editor closes.
|
Copyright © 2019 erwin, Inc.
All rights reserved.
|
|