EclipseLink DDL用小数秒创建MySql DATETIME

Question

I am using EclipseLink 2.6.0 in my project together with MySQL 5.6.19 .

Since mysql 5.6.4 supports a fieldtype DATETIME(6) which allows to store a date with milliseconds precision in its value. Also EclipseLink 2.6.0 says it supports this functionality.

---

I am creating a database from my entities . And I am not able to force it to create a proper field. In logs, during database creation I constantly see:

CREATE TABLE MY_TABLE (..., DATE_FIELD DATETIME ...)

when, obviously, what I want is:

CREATE TABLE MY_TABLE (..., DATE_FIELD DATETIME(6), ...)

---

I tried using both, simple and annotated version:

private java.util.Date date1;

@Temporal(value = TemporalType.TIMESTAMP)
private java.util.Date date2;

but the outcome is always the same. So how does the Eclipselink supports this? How to determine the proper field type?

Answer 1

Thanks specializt for the tip, easy solution:

@Column(length=6)
private Date myTime;

works also with YodaTime converter ( description )

@Column(length=6)
@Converter(name = "dateTimeConverter", converterClass = pl.ds.eemediation.storage.entities.converters.JodaDateTimeConverter.class)
@Convert("dateTimeConverter")
private DateTime date;