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Data Bases > Btrieve > Re: Pervasive P...
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Re: Pervasive PSQL 8.5 and C++ On Linux

by "John C. Frickson" <frickson_AT_gibbon.com> Mar 23, 2007 at 04:20 PM

I downloaded/installed the 8.7 client on Linux. Still blew
at the same place. I didn't upgrade the server to 8.7 because
we have to go through a whole test and acceptance process.
If the 8.7 client acted any differently I probably would have
upgraded the server.

Can a 9.x client talk to an 8.5 server?


On 2007-03-15 07:16, Bill Bach wrote:
> V8.5 was pretty early in the Linux code.  Perhaps moving to V8.7 would
> help?  This is a free update...
> 	Goldstar Software Inc.
> 	Pervasive-based Products, Training & Services
> 	Bill Bach
> 	BillBach@[EMAIL PROTECTED]
> 	http://www.goldstarsoftware.com
> 	*** Chicago: Pervasive Service & Sup****t Class - 03/2007 ***
> 
> John C. Frickson wrote:
> 
>> I tried initializing buflen, and using SQLConnect(). Still get
>> seg fault.
>> 
>> For grins, I tried installing the 9.5 driver, but it couldn't
>> talk to the 8.5 server. I didn't think it would work, but it was
>> worth a try.
>> 
>> Maybe I'll try writing C wrapper functions and call them from
>> the C++ program.
>> 
>> 
>> On 2007-03-13 11:13, Bill Bach wrote:
>> > Not sure if it is the same thing or not, but this sounds awfully
>> > similar:
>> > 	http://bugs.mysql.com/bug.php?id=15248
>> > 
>> > Other random suggestions (with no basis whatsoever):
>> > 1) buflen is not initialized.  Definition I found was "Pointer to
>> > the total number of bytes (excluding the null termination byte)
>> > available to return in szConnStrOut."  Not sure if it should be
>> > initialized to 256 or not.
>> > 2) Have you tried the more simplistic SQLConnect?  Or do you need
>> > more flexibility in your "real" code?
>> > 	BtrieveBill
>> > 
>> > John C. Frickson wrote:
>> > 
>> >> I'm migrating some of our applications from Windows to our
>> >> Linux servers. The programs are in C++. They always get a
>> >> segmentation fault in SQLDriverConnect(). I've created a very
>> >> simple program in both C and C++ that exhibits the problem.
>> >> Save as both prg_c.c and prg_cpp.cpp and compiled with:
>> >>     gcc -m32 -lodbc -o prg_c prg_c.c
>> >>     g++ -m32 -lodbc -o prg_cpp prg_cpp.c
>> >> (-m32 because the server is running 64-bit Linux and PSQL
>> >> only comes with 32-bit drivers.)
>> >> 
>> >> -----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
>> >> #include <string.h>
>> >> #include <sql.h>
>> >> #include <sqlext.h>
>> >> 
>> >> int main(int argc, char **argv)
>> >> {
>> >>    SQLHENV henv;
>> >>    SQLHDBC hdbc;
>> >>    SQLCHAR dsn[120];
>> >>    short buflen;
>> >>    char buffer[257];
>> >>    int status;
>> >> 
>> >>    strcpy((char*)dsn, "DSN=Paragon");
>> >>    if (SQLAllocEnv (&henv) != SQL_SUCCESS)
>> >>      return -1;
>> >>    if (SQLAllocConnect (henv, &hdbc) != SQL_SUCCESS)
>> >>      return -1;
>> >>    status = SQLDriverConnect (hdbc, 0, dsn, SQL_NTS,
>> >>          (SQLCHAR*)buffer, sizeof (buffer), &buflen,
>> >>          SQL_DRIVER_COMPLETE);
>> >>    if (status != SQL_SUCCESS && status != SQL_SUCCESS_WITH_INFO)
>> >>      return -1;
>> >>    SQLDisconnect (hdbc);
>> >>    SQLFreeConnect (hdbc);
>> >>    SQLFreeEnv (henv);
>> >> 
>> >>    return 0;
>> >> }
>> >> -----8<-----8<-----8<-----8<-----8<-----8<-----8<-----8<-----
>> >> 
>> >> The straight C program runs fine. The C++ program blows in
>> >> the SQLDriverConnect() call.
>> >> 
>> >> I've tried both -lodbc and -liodbc and both fail at the same
>> >> place.
>> >> 
>> >> John
>> > 
>
 




 6 Posts in Topic:
Pervasive PSQL 8.5 and C++ On Linux
"John C. Frickson&qu  2007-03-12 14:40:16 
Re: Pervasive PSQL 8.5 and C++ On Linux
"Bill Bach" <  2007-03-13 11:13:40 
Re: Pervasive PSQL 8.5 and C++ On Linux
"John C. Frickson&qu  2007-03-14 12:28:37 
Re: Pervasive PSQL 8.5 and C++ On Linux
"Bill Bach" <  2007-03-15 07:16:56 
Re: Pervasive PSQL 8.5 and C++ On Linux
"John C. Frickson&qu  2007-03-23 16:20:58 
Re: Pervasive PSQL 8.5 and C++ On Linux
"Bill Bach" <  2007-03-23 17:32:07 

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tan12V112 Wed Oct 15 21:00:01 CDT 2008.