How to find by date from timestamp column in JPA criteria?

How to find by date from timestamp column in JPA criteria?

In Java Persistence API (JPA) criteria queries, if you want to find records based on a date from a timestamp column, you can use the function method along with the CriteriaBuilder to extract the date part from the timestamp column. Here's an example:

Let's assume you have an entity YourEntity with a timestamp column named timestampColumn:

@Entity @Table(name = "your_entity") public class YourEntity { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; @Column(name = "timestamp_column") private Timestamp timestampColumn; // other fields and methods }

Now, if you want to find records where the date part of timestampColumn is equal to a specific date, you can create a criteria query like this:

import javax.persistence.criteria.CriteriaBuilder; import javax.persistence.criteria.CriteriaQuery; import javax.persistence.criteria.Predicate; import javax.persistence.criteria.Root; import java.sql.Timestamp; import java.util.Date; import java.util.List; public class YourEntityRepository { // Inject EntityManager or use @PersistenceContext annotation public List<YourEntity> findByDate(Date specificDate) { CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder(); CriteriaQuery<YourEntity> criteriaQuery = criteriaBuilder.createQuery(YourEntity.class); Root<YourEntity> root = criteriaQuery.from(YourEntity.class); // Extract date part from timestampColumn Predicate predicate = criteriaBuilder.equal( criteriaBuilder.function("date", Date.class, root.get("timestampColumn")), specificDate ); criteriaQuery.where(predicate); return entityManager.createQuery(criteriaQuery).getResultList(); } }

In this example:

  • criteriaBuilder.function("date", Date.class, root.get("timestampColumn")) extracts the date part from the timestampColumn.
  • criteriaBuilder.equal(...) is used to create a predicate for checking equality with the specific date.
  • Adjust the entity and column names based on your actual JPA entity.

Note: The exact method to extract the date part might vary depending on the database you are using. The example above assumes a standard SQL date function. If you're using a different database, you may need to adjust the function accordingly.

Examples

  1. "JPA Criteria API find by date equality"

    • Description: Searching for records in JPA where a timestamp column matches a specific date.
    CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<EntityType> query = cb.createQuery(EntityType.class); Root<EntityType> root = query.from(EntityType.class); query.select(root) .where(cb.equal(root.get("timestampColumn"), desiredDate));

  2. "JPA Criteria API find by date range"

    • Description: Using JPA Criteria API to find records within a specific date range.
    CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<EntityType> query = cb.createQuery(EntityType.class); Root<EntityType> root = query.from(EntityType.class); query.select(root) .where(cb.between(root.get("timestampColumn"), startDate, endDate));

  3. "JPA Criteria API find by date before specific date"

    • Description: Searching for records in JPA where the timestamp is before a specific date.
    CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<EntityType> query = cb.createQuery(EntityType.class); Root<EntityType> root = query.from(EntityType.class); query.select(root) .where(cb.lessThan(root.get("timestampColumn"), specificDate));

  4. "JPA Criteria API find by date after specific date"

    • Description: Using JPA Criteria API to find records where the timestamp is after a specific date.
    CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<EntityType> query = cb.createQuery(EntityType.class); Root<EntityType> root = query.from(EntityType.class); query.select(root) .where(cb.greaterThan(root.get("timestampColumn"), specificDate));

  5. "JPA Criteria API find by date with time component"

    • Description: Searching for records in JPA where the timestamp matches a specific date along with the time component.
    CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<EntityType> query = cb.createQuery(EntityType.class); Root<EntityType> root = query.from(EntityType.class); query.select(root) .where(cb.equal(root.get("timestampColumn"), specificDateTime));

  6. "JPA Criteria API find by date ignoring time component"

    • Description: Using JPA Criteria API to find records where the timestamp matches a specific date while ignoring the time component.
    CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<EntityType> query = cb.createQuery(EntityType.class); Root<EntityType> root = query.from(EntityType.class); query.select(root) .where(cb.equal(cb.function("date", Date.class, root.get("timestampColumn")), specificDate));

  7. "JPA Criteria API find by current date"

    • Description: Searching for records in JPA where the timestamp matches the current date.
    CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<EntityType> query = cb.createQuery(EntityType.class); Root<EntityType> root = query.from(EntityType.class); query.select(root) .where(cb.equal(cb.function("date", Date.class, root.get("timestampColumn")), new Date()));

  8. "JPA Criteria API find by date part"

    • Description: Using JPA Criteria API to find records where a specific part of the date (e.g., year, month) matches.
    CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<EntityType> query = cb.createQuery(EntityType.class); Root<EntityType> root = query.from(EntityType.class); query.select(root) .where(cb.equal(cb.function("year", Integer.class, root.get("timestampColumn")), desiredYear));

  9. "JPA Criteria API find by date with timezone"

    • Description: Searching for records in JPA where the timestamp matches a specific date in a given timezone.
    CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<EntityType> query = cb.createQuery(EntityType.class); Root<EntityType> root = query.from(EntityType.class); query.select(root) .where(cb.equal(cb.function("convert_tz", Date.class, root.get("timestampColumn"), "fromTimezone", "toTimezone"), specificDate));

  10. "JPA Criteria API find by date with specific format"

    • Description: Using JPA Criteria API to find records where the timestamp matches a specific date format.
    CriteriaBuilder cb = entityManager.getCriteriaBuilder(); CriteriaQuery<EntityType> query = cb.createQuery(EntityType.class); Root<EntityType> root = query.from(EntityType.class); query.select(root) .where(cb.equal(cb.function("date_format", String.class, root.get("timestampColumn"), "yyyy-MM-dd"), "specific_date"));

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