Ensure Timestamp Column
Returns a copy of a specified table, supplemented if necessary to include a timestamp column with a specified name. The added column is filled with the current time.
Arguments
The function has the following arguments:
Table: The specified table.
Column Name: Name to be used for the timestamp column, if one is added.
Append Column: If set to 1, the timestamp column is appended to the end of the table; otherwise it is inserted as the first column.
This function returns a table.