Jeff Davis <pgsql(at)j-davis(dot)com> writes:
> A little while ago, I saw a compiler warning creep in:
> In file included from gram.y:11202:
> scan.c: In function yy_try_NUL_trans:
> scan.c:15765: warning: unused variable yyg
Yeah, this is a bogosity in the current release of "flex".
http://sourceforge.net/tracker/index.php?func=detail&aid=2820457&group_id=97492&atid=618177
regards, tom lane