On Jul27, 2011, at 08:51 , Petro Meier wrote:
> If  I use PQescapeByteaConn() for a conenction to a PG9.1 Beta3 server, this 
> function returns (e.g.) "\xea2abd8ef31...(and so on.)...".
> Here the problem: there should be a second backslash in the prefix. The SQL 
> Statement which uses this string (INSERT statement in my case) returns with 
> an error ("Invalid byte sequence..."). If I add the second backslash manually 
> everything works fine.
> When connecting to a PG9.0 server and using this function, the return value 
> is correct (with two backslashes): "\\xea2abd8ef31...( and so on.)...".
> This should be a bug in PG9.1 Beta3

Sounds as if PQescapeByteaConn() is confused about whether 
standard_conforming_strings is on or off. What value does that setting have in 
your 9.0 and 9.1 instances?

BTW, I think 9.1 is the first release where that settings defaults to "on", so 
maybe that adds to PQescapeByteaConn()'s confusion. In theory it shouldn't 
since PQescapeByteaConn() should simply detect the server's setting and react 
accordingly, but who knows...

best regards,
Florian Pflug


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