Re: 64-bit API for large object

2012/9/22 Tatsuo Ishii <ishii@postgresql.org>:
> Tom, Kaigai,
>
>> Kohei KaiGai <kaigai@kaigai.gr.jp> writes:
>>> Tom, could you give us a suggestion which manner is better approach; whether
>>> the PQfn should have responsibility for endian translation of 64bit-integer, or
>>> callers (lo_tell64 or lo_seek64)?
>>
>> Adding anything inside pqFunctionCall is useless, unless we were to add
>> an int64 variant to PQArgBlock, which isn't a good idea because it will
>> be an ABI break.  The functions in fe-lobj.c have to set up the int64
>> value as if it were pass-by-reference, which means dealing with
>> endianness concerns there.
>
> I just want to make sure you guy's point.
>
> We do not modify pqFunctionCall. That means PQfn does not accept
> PQArgBlock.isint != 0 and PQArgBlock.len == 8 case. If a PQfn caller
> wants to send 64-bit integer, it should set PQArgBlock.isint = 0 and
> PQArgBlock.len = 8 and set data pass-by-reference. Endianness should
> be taken care by the PQfn caller. Also we do not modify fe-misc.c
> because there's no point to add pqPutint64/pqGetint64(they are called
> from pqFunctionCall in the patch).
>
Yes, it is exactly what I suggested.

Thanks,
-- 
KaiGai Kohei <kaigai@kaigai.gr.jp>