BUG: ESQL-C: Error "Division by Zero" During Precompilation

• Microsoft Embedded SQL for C Programmer's Toolkit, version 6.5

Q158885 : BUG: ESQL-C: Divisor in Parentheses May Cause AV in NSQLPREP

SYMPTOMS

While precompiling a C division expression, NSQLPREP may generate an "Integer division by zero" exception error. The 16-bit precompiler SQLPREP may generate the error "run-time error R6003 - integer divide by 0". This error may occur not only with integers, but with any numeric datatype (for example, float and so on).

WORKAROUND

To work around this problem, ensure that there is a character string variable assignment in the program, before the division expression.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Embedded SQL for C Programmer's Toolkit version 6.5. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Other operators (such as +, -, and *) do not cause an exception error in NSQLPREP.

The following is a sample code fragment that will cause the ESQL-C precompiler to generate a division by zero exception:

int main (int argc, char** argv, char** envp)
{
int x;

EXEC SQL BEGIN DECLARE SECTION;

char o[3];

EXEC SQL END DECLARE SECTION;

x = 1;
x = 1 / x;   // causes div/0

return (0);
} /* end program */  

int main (int argc, char** argv, char** envp)
{
int x;
char string[] = "";  // character string assignment
EXEC SQL BEGIN DECLARE SECTION;
char o[3];
EXEC SQL END DECLARE SECTION;
x = 1;
x = 1 / x;   // works now
return (0);
   } /* end program */  

Keywords : kbprg SSrvESQL_C SSrvProg kbbug6.50
Version : 6.5
Platform : WINDOWS
Issue type : kbbug