From: John Lister <john.lister@kickstone.com>
To: Merlin Moncure <mmoncure@gmail.com>
Cc: Andrew Chernow <ac@esilo.com>
Cc: pgsql-hackers@postgresql.org
Subject: Re: Array types
Date: Tue, 07 Apr 2009 20:54:28 +0100
Message-ID: <49DBAF74.5020409@kickstone.com> (raw)
In-Reply-To: <b42b73150904071244k35c139d5la58d064b31f2a32@mail.gmail.com>
References: <89DBB5874E89413698A8E275E5E79154@squarepi.com>
<49DBA65B.9020706@esilo.com>
<BF6DDFB5B0B346AC94F9683EC6339E73@squarepi.com>
<b42b73150904071244k35c139d5la58d064b31f2a32@mail.gmail.com>
Cheers, nice to know it is possible... Now to see if i can get
java/python to do the same :) or to use a modified libpq somehow...
Merlin Moncure wrote:
> On Tue, Apr 7, 2009 at 3:35 PM, John Lister
> <john.lister-ps@kickstone.com> wrote:
>
>> Does libpqtypes pass the array "over the wire" as an array? Ideally i'd like
>> to do this with jdbc, but might give me a pointer...
>>
>
> We send/receive the server's array format. This is not quite a C
> array, and is definitely not a java array. It's a packed postgres
> specific (network byte order) format. It is much faster and tighter
> than text in some cases however. We present an interface to copy C
> arrays to postgres style formats such as:
>
> PGarray a;
> PQgetf(res, tuple_num, "%int4[]", field_num, &a);
>
> This will 'pop' a result out of your result that presents the array
> internals (which you could then loop).
>
> merlin
>
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To: pgsql-hackers@postgresql.org
Cc: john.lister@kickstone.com, mmoncure@gmail.com, ac@esilo.com
Subject: Re: Array types
In-Reply-To: <49DBAF74.5020409@kickstone.com>
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