How to search date field for a String using JPA Criteria API

Question

This is a question that spins off my other Question here . I thought it would be best put as a different question after someone(@Franck) pointed me to this link and this one

Answer 1

This works in my case H2 (I use it for unit-tests), and I hope will work as well in Postgresql and Oracle, since TO_CHAR function seems to be cross-DB supported.

Path path = ua.get(MyEntity_.timestamp);
Expression dateStringExpr = cb.function("TO_CHAR", String.class, path, cb.literal("DD.MM.YYYY HH24:MI:SS"));
predicates.add(cb.like(dateStringExpr, "%" + value + "%"));

PS. MyEntity_ stands for metamodel generated for real MyEntity. You may read about Metamodels in Oracle docuemntation for Criteria API.