ERROR: operator does not exist: integer !=- integer

Here is the steps to reproduce it in CVS HEAD:

$ uname -a
Linux os-server 2.6.9-11.19AX #1 Fri Aug 5 05:12:07 EDT 2005 i686 i686 i386
GNU/Linux

$ ./postgres --single -D $HOME/pgsql/data postgres

PostgreSQL stand-alone backend 8.3devel
backend> show server_version;
1: server_version (typeid = 25, len = -1, typmod = -1, byval =
f)
----
1: server_version = "8.3devel" (typeid = 25, len = -1, typmod = -1,
byval = f)
----
backend> select -1 != -1;
1: ?column? (typeid = 16, len = 1, typmod = -1, byval = t)
----
1: ?column? = "f" (typeid = 16, len = 1, typmod = -1, byval =
t)
----
backend> select -1 !=-1;
ERROR: operator does not exist: integer !=- integer at character 11
HINT: No operator matches the given name and argument type(s). You might
need to add explicit type casts.
STATEMENT: select -1 !=-1;

A quick hack in scan.l :

*** src/backend/parser/scan.l.old 2007-03-04 11:39:56.831289992 +0800
--- src/backend/parser/scan.l 2007-03-04 11:40:04.142178568 +0800
***************
*** 605,610 ****
--- 605,617 ----
{
int ic;

+ /* filter out operaters end
with '=' */
+ if (yytext[nchars - 2] ==
'=')
+ {
+ nchars--;
+ continue;
+ }
+
for (ic = nchars-2; ic >= 0;
ic--)
{
if
(strchr("~!(at)#^&|`?%", yytext[ic]))

Now the result is correct:

backend> select -1 !=-1;
1: ?column? (typeid = 16, len = 1, typmod = -1, byval = t)
----
1: ?column? = "f" (typeid = 16, len = 1, typmod = -1, byval =
t)
----
--
Regards,
William ZHANG