A generated AseCommand object, performs Update operations on the database when an AseDataAdapter.Update() is called.
The GetUpdateCommand method returns the AseCommand object to be executed, so it may be useful for informational or troubleshooting purposes.
You can also use GetUpdateCommand as the basis of a modified command. For example, you might call GetUpdateCommand and modify the CommandTimeout value, and then explicitly set that value on the AseDataAdapter.
SQL statements are first generated when the application calls Update or GetUpdateCommand. After the SQL statement is first generated, the application must explicitly call RefreshSchema if it changes the statement in any way. Otherwise, the GetUpdateCommand will be still be using information from the previous statement, which might not be correct.