From: Date: July 13 1999 4:16pm
Subject: MYSQL error? (fwd)
List-Archive: http://lists.mysql.com/mysql/7170
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---------- Forwarded message ----------
Date: Tue, 13 Jul 1999 09:59:49 -0400
From: Gyorgy Fekete <gyuri@stripped>
To: bane@stripped, claudia@stripped
Subject: MYSQL error?


In case anyone cares...

  In mysql documentation (Node: mysql_fetch_field_direct)
  the example given:

	MYSQL_FIELD *field;
	field = mysql_fetch_field_direct(result, i);

  is wrong. It should be:

	field = &mysql_fetch_field_direct(res, ui);
  --------------^----------------
The docs give the prototype 
MYSQL_FIELD *mysql_fetch_field_direct(MYSQL_RES *result, unsigned int fieldnr)
which *SEEMS* correct, but the mysql.h file revelas that this function is 
really a macro, therefore the type checking is weak. Discovery of this error
came from the compiler message:

    mt.c: In function `main':
    mt.c:53: incompatible types in assignment
    make: *** [mt.o] Error 1

for the line

    field = mysql_fetch_field_direct(res, ui); // res, ui are as approrpiate

I changed it to:

    field = &mysql_fetch_field_direct(res, ui); 

and everything was fine.