Working with Views¶
Views can be created to restrict access to specific rows or columns of a table. A view can be created from one or more tables and is determined by the query used to create the view.
You can perform the following operations on an existing view:
Exporting the View DDL¶
Follow the steps below to export view the DDL:
Right-click the selected view and select Export DDL.
The Data Studio Security Disclaimer dialog box is displayed.
Click OK.
The Save As dialog box is displayed.
In the Save As dialog box, select the location to save the DDL and click Save. The status bar displays the progress of the operation.
Note
To cancel the export operation, double-click the status to open the Progress View tab and click
.The exported file name will not be the same as the view name, if the view name contains characters which are not supported by Windows.
Multiple objects can be selected to export the view DDL. Refer to Batch Export for the list of the objects that are not supported for exporting view DDL.
The Export message and status bar display the status of the completed operation.
Database Encoding
File Encoding
Supports Exporting DDL
UTF-8
UTF-8
Yes
GBK
Yes
LATIN1
Yes
GBK
GBK
Yes
UTF-8
Yes
LATIN1
No
LATIN1
LATIN1
Yes
GBK
No
UTF-8
Yes
Dropping a View¶
Individual or batch dropping can be performed on views. Refer to Dropping a Batch of Objects for batch dropping.
Follow the steps below to drop the view:
Right-click the selected view and select Drop View.
The Drop View dialog box is displayed.
Click Yes to drop the view.
The status bar displays the status of the completed operation.
Dropping a View Cascade¶
Follow the steps below to drop a view and its dependent database objects:
Right-click the selected view and select Drop View Cascade.
The Drop View dialog box is displayed.
Click Yes to drop the view and its dependent database objects.
The status bar displays the status of the completed operation.
Renaming a View¶
Follow the steps below to rename a view:
Right-click the selected view and select Rename View.
The Rename View dialog box is displayed.
Enter the required name for the view and click OK. You can view the renamed view in the Object Browser.
The status bar displays the status of the completed operation.
Setting the Schema for a View¶
Follow the steps below to set the schema for a view:
Right-click the selected view and select Set Schema.
The Set Schema dialog box is displayed.
Select the required schema from the drop-down list and click OK.
The status bar displays the status of the completed operation.
If the required schema contains a view with the same name as the current view, then Data Studio does not allow setting the schema for the view.
Viewing the DDL¶
Follow the steps below to view the DDL of the view:
Right-click the selected view and select Show DDL.
The DDL is displayed in a new SQL Terminal tab. You must refresh the Object Browser to view the latest DDL.
Setting the Default Value for the View Column¶
Follow the steps below to set the default value for a column in the view:
Right-click the selected column name under the view and select Set View Column Default Value.
A dialog box with the current default value (if it is set) is displayed which prompts you to provide the default value.
Enter the value and click OK.
Data Studio displays the status of the operation in the status bar.
Viewing the Properties of a View¶
Follow the steps below to view the properties of the View:
Right-click the selected View and select Properties.
The properties (General and Columns) of the selected View is displayed in different tabs.
Note
If the property of a View is modified that is already opened, then refresh and open the properties of the View again to view the updated information on the same opened window.
Granting/Revoking a Privilege¶
Follow the steps below to grant/revoke a privilege:
Right-click the selected view and select Grant/Revoke.
The Grant/Revoke dialog box is displayed.
Refer to Granting/Revoking a Privilege to grant/revoke privilege.