Re: have you feel anything when you read this ?

Stephan Szabo wrote:
> On Fri, 31 Mar 2006, Eugene E. wrote:
> 
> 
>>Peter Eisentraut wrote:
>>
>>>Eugene E. wrote:
>>>
>>>
>>>>the problem is: you'll get this four byte sequence '\000' _instead_
>>>>of NUL-byte anyway.
>>>
>>>
>>>What you seem to be missing is that PostgreSQL data can be represented
>>>in textual and in binary form.  What you in psql is the textual form.
>>>If you want the binary form you need to select it.  Then you can pass
>>>the exact bytes back and forth.
>>
>>your sentence is not true.
>>I can not select exact bytes even if i use BYTEA type
> 
> 
> No, that is still using the textual form.  If you use PQexecParams and set
> the last argument to show you want binary data, you should get binary
> data.

Documentation says:
===
PQexecParams
    Submits a command to the server and waits for the result, with the 
ability to pass parameters separately from the SQL command text.
===

How should i use this func to change so-called "textual form" of a 
select-result to so-called "binary form" ?