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