GET_UTC_DATE() and GET_UTC_TIMESTAMP() with Toplink Expression

Question

Hi All,
I have a requirement which needs me to do some manipulation with dates. I am writing a report query and need to use the get_utc-date() function. What is the equivalent using the toplink expression builder?
An example of such a query should generate the following SQL:
SELECT order_no FROM vista_order_transfer vot where vot.updated_timestamp < get_utc_date() - 30. I could not figure out how to use the expression builder to build the get_utc_date() - 30 part of this SQL.
Any help would be gratly appreciated.
Roland.

Answer 1

There is a currentDate() method on Expression which will return the current date, but this is SYSDATE not UTC. To call this function you can use the getFunction() method on the ExpressionBuilder.
i.e.
ExpressionBuilder builder = new ExpressionBuilder();
Expression expression = builder.get("updatedTimestamp").lessThan(ExpressionMath.subtract(builder.getFunction("GET_UTC_DATE"), 30));
There is also an Expression method postfixSQL() that will let you append any SQL you wish to the expression.