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Question

I would like to compare a date to a timestamp in the database. I currently use

predicates.add(criteriaBuilder.between(eventRoot.<Date>get("time"), dBegin, dEnd));

• dBegin = Thu Feb 04 00:00:00
• dEnd = Thu Feb 04 23:59:59

eventRoot

private Date time;

I also tried formatting the date with the following format, to no success.

DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

And changing

predicates.add(criteriaBuilder.equal(eventRoot.<String>get("time"), curDformat));

where curDformat is the formatted date to

2025-08-05

And changing the type to String in my eventRoot.

How would I go about only checking the date with the database? And would this improve performance or is it fine doing it with between?

Answer 1

SimpleDateFromat dateFormat = new SimpleDateFromat("yyyy-MM-dd hh:mm:ss");
Date dBegin = dateFormat.parse("2025-08-05 00:00:00");
Date dEnd = dateFormat.parse("2025-08-05 23:59:59");

predicates.add(criteriaBuilder.between(<Date>get("time"), dBegin, dEnd));

You could use between, it works too.

Answer 2

The criteriaBuilder predicate for date comparison without time

cb.equal(cb.function("date", Date.class, myObj.get("createdAt")), cb.function("date", Date.class, cb.literal(new Date())));

It produces the following SQL where clause.

where date(myObj0_.created_at)=date(?)