Hibernate version:
2.1.6

Mapping documents:
------------------------ Feature Attribute Class --------------------------

/**
* @hibernate.property column="NAME"
* @hibernate.column name="NAME" not-null="true" length="60" unique-key="NAME_FEATURE_ALT_KEY"
*/
public String getName() {
return super.getName();
}

/**
* @hibernate.many-to-one column="FEATURE_ID" not-null="true" cascade="none"
* @hibernate.column name="FEATURE_ID" not-null="true" unique-key="NAME_FEATURE_ALT_KEY"
*/
public Feature getFeature() {
return this.feature;
}

----------------------------------- LookupObject class -----------------------
/**
* @hibernate.property column="NAME" length="60" not-null="true" unique="true"
*/
public String getName() {
return this.name;
}

------------------------------------------

I need to index a String column, so the unique index should be case insensitive, or a function based index.

I'd like to do this for the single column, or composite index.

With @hibernate.property unique="true" or @hibernate.column unique-key="blah" I don't see how I could tell it to use the upper function in the ddl generated from hbm2ddl.

Are there no responses because this is in the wrong forum, because it is a duplicate question, or because it cannot be done? If it cannot be done, are there any plans to support this in the future?

it's not supported (and there are no current plans/jiras for it)