Temporarily back out fixes for unary minus parsing.

Will re-introduce for v6.4 but requires fixes for automatic type
 conversion beforehand.

src/backend/parser/scan.l

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.37 1998/03/18 16:50:25 thomas Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.38 1998/04/08 06:35:00 thomas Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -148,10 +148,12 @@ self			[,()\[\].;$\:\+\-\*\/\<\>\=\|]
 op_and_self		[\~\!\@\#\%\^\&\|\`\?\$\:\+\-\*\/\<\>\=]
 operator		{op_and_self}+
 
+xminteger		{integer}/-
+xmreal			{real}/{space}*-{digit}
 xmstop			-
 
-integer			[\-]?{digit}+
-real			[\-]?{digit}+\.{digit}+([Ee][-+]?{digit}+)?
+integer			-?{digit}+
+real			-?{digit}+\.{digit}+([Ee][-+]?{digit}+)?
 
 param			\${integer}
 
@@ -289,8 +291,7 @@ other			.
 
 {typecast}		{ return TYPECAST; }
 
-{self}/{space}*-[\.0-9]	{
-					BEGIN(xm);
+{self}/-[\.0-9]	{
 					return (yytext[0]);
 				}
 {self}			{ 	return (yytext[0]); }
@@ -310,7 +311,6 @@ other			.
 					return (PARAM);
 				}
 
-
 {identifier}/{space}*-{number}	{
 					int i;
 					ScanKeyword		*keyword;
@@ -386,8 +386,6 @@ other			.
 					CheckFloat8Val(yylval.dval);
 					return (FCONST);
 				}
-
-
 {identifier}	{
 					int i;
 					ScanKeyword		*keyword;