I'm so sorry, it seems that there was something wrong with the pictures in my last letter.
Here I send the mail again with the
correct pictures:
Thanks a lot for your answer.
Well ,in fact, if I use the extension called odbc_fdw , the same problem will happen.
That’s because the odbc_fdw will also call the odbc driver.
The follow pictures explain the situation.
When use the odbc_fdw extension, the libraries are loaded in the following way.
After all the libraries are loaded, When the function check_client_encoding is called , the whole postgres process will crash , result in a core dumped problem.
Best Regards,
rohtodeveloper
From: rohtodeveloper@outlook.com
To: michael.paquier@gmail.com
CC: pgsql-odbc@postgresql.org
Subject: RE: [ODBC] This may be a bug: odbc's function"check_client_encoding" have the same name with postgres's function.
Date: Tue, 28 Oct 2014 17:35:48 +0000
Thanks a lot for your answer.
Well ,in fact, if I use the extension called odbc_fdw , the same problem will happen.
That’s because the odbc_fdw will also call the odbc driver.
The follow pictures explain the situation.
When use the odbc_fdw extension, the libraries are loaded in the following way.

After all the libraries are loaded, When the function check_client_encoding is called , the whole postgres process will crash , result in a core dumped problem.

Best Regards,
rohtodeveloper
Date: Mon, 20 Oct 2014 21:06:24 +0900
Subject: Re: [ODBC] This may be a bug: odbc's function"check_client_encoding" have the same name with postgres's function.
From: michael.paquier@gmail.com
To: rohtodeveloper@outlook.com
CC: pgsql-odbc@postgresql.org