@Override
    public PostgreSQLQuery<Tuple> select(Expression<?>... exprs) {
        queryMixin.setProjection(exprs);
        @SuppressWarnings("unchecked") // This is the new type
                PostgreSQLQuery<Tuple> newType = (PostgreSQLQuery<Tuple>) this;
        return newType;
    }
{@code PostgreSQLQuery} provides Postgres related extensions to SQLQuery.

If you need to subtype this, use the base class instead.

@param <T> the result type
querydsl-sql/src/main/java/com/querydsl/sql/postgresql/PostgreSQLQuery.java