Binary tx format for an array? - Mailing list pgsql-jdbc

From Michael Guyver
Subject Binary tx format for an array?
Date
Msg-id 30b57570606211026o66e337c9s658387db0b32aeed@mail.gmail.com
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Responses Re: Binary tx format for an array?
Re: Binary tx format for an array?
Re: Binary tx format for an array?
List pgsql-jdbc
Hi there,

My question relates to trying to implement the binary transmission
protocol for an Array type. I understand that the only place the
format is documented is in the Postgres C source code.

I've had a look through it and it seems comprehensible enough (to a
non-C programmer), but I was wondering how the following expression
would evaluate:

// arrayfuncs.c, in array_recv
element_type = pq_getmsgint(buf, sizeof(Oid));

or more specifically, the

int size = sizeof(Oid);

expression. Knowing this value would mean knowing how many bytes
describing the Oid to transmit.

Cheers

Michael

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