Function sz_orm_cpp_qb_build 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn sz_orm_cpp_qb_build(
    qb: SzOrmQueryBuilderHandle,
) -> *mut c_char

Build SQL + params JSON, return C string (free with sz_orm_cpp_qb_result_free)

Safety

SAFETY: qb 必须有效。