How to specify Double's precision on hibernate?

Question

I try to create a table from hibernate annotations. I need to have a column of Double type, with the length specified like : (10,2). So SQL syntax show like:

Answer 1

The length element of the Column annotation applies only if a string-valued column is used. In your case, you should use the precision and the scale elements.

@Column(precision=10, scale=2)

Here is what the specification writes about them:

• int - precision - (Optional) The precision for a decimal (exact numeric) column. (Applies only if a decimal column is used.)
• int - scale - (Optional) The scale for a decimal (exact numeric) column. (Applies only if a decimal column is used.)

References

• JPA 1.0 Specification
  • Section 9.1.5 "Column Annotation"