String columnDefinition() 
{

}

The SQL fragment that is used when generating the DDL for the column. Defaults to the generated SQL to create a column of the inferred type.

 boolean insertable() 
{

}

Whether the column is included in SQL INSERT statements generated by the persistence provider.

 int length() 
{

}

The column length. (Applies only if a string-valued column is used.)

 String name() 
{

}

The name of the column. Defaults to the property or field name

 boolean nullable() 
{

}

Whether the database column is nullable

 int precision() 
{

}

The precision for a decimal (exact numeric) column. (Applies only if a decimal column is used.) Value must be set by developer if used when generating the DDL for the column.

 int scale() 
{

}

The scale for a decimal (exact numeric) column. (Applies only if a decimal column is used.)

 String table() 
{

}

The name of the table that contains the column. If absent the column is assumed to be in the primary table.

 boolean unique() 
{

}

Whether the property is a unique key. This is a shortcut for the UniqueConstraint annotation at the table level and is useful for when the unique key constraint is only a single field. This constraint applies in addition to any constraint entailed by primary key mapping and to constraints specified at the table level.

 boolean updatable() 
{

}

Whether the column is included in SQL UPDATE statements generated by the persistence provider.