public void serializeForDelete(QueryMetadata md) {
        append(DELETE);
        handleJoinTarget(md.getJoins().get(0));
        if (md.getWhere() != null) {
            append(WHERE).handle(md.getWhere());
        }
    }
{@code JPQLSerializer} serializes Querydsl expressions into JPQL syntax.

@author tiwe
querydsl-jpa/src/main/java/com/querydsl/jpa/JPQLSerializer.java