Function sz_orm_cpp_qb_new 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn sz_orm_cpp_qb_new(
    db_type: u32,
) -> SzOrmQueryBuilderHandle

Create QueryBuilder, return handle (null indicates failure)

Safety

SAFETY: 返回的句柄必须通过 sz_orm_cpp_qb_free 释放。