On 10/15/13 11:02 AM, Tatsuo Ishii wrote:
> In manual of "48.5. Message Formats" section, there is a description
> of "Bind" message.
>
> Int16[C]
> The parameter format codes. Each must presently be zero (text) or one (binary).
>
> This could be completely non-existent field in the current
> implementation of PostgreSQL. I think the fact is not very clear from
> the description. It would be nice the description is something like:
>
> Int16[C]
> The parameter format codes. Each must presently be zero (text) or one (binary).
> This field does not exist if the number of prameter values is 0.
This is already explicitly said in the description of the previous field:
"The number of parameter format codes that follow (denoted C below).
This can be zero to indicate that there are no parameters or that the
parameters all use the default format (text); or one, in which case the
specified format code is applied to all parameters; or it can equal the
actual number of parameters."
Also the documentation for the array notation explains this: "An array
of k n-bit integers, each in network byte order. The array length k is
always determined by an earlier field in the message. Eg. Int16[M].".
This part seems clear enough to me, and I don't think repeating that
*three times* is necessary. We already say it twice.
Regards,
Marko Tiikkaja