fix: [2.5] Revert add a sign (positive or negative) to constants (#41192)

issue: #41174
master pr: #41191

Signed-off-by: Cai Zhang <cai.zhang@zilliz.com>

internal/parser/planparserv2/Plan.g4

@@ -1,8 +1,8 @@
 grammar Plan;
 
 expr:
-	(ADD | SUB)? IntegerConstant											     # Integer
-	| (ADD | SUB)? FloatingConstant										         # Floating
+	IntegerConstant											                     # Integer
+	| FloatingConstant										                     # Floating
 	| BooleanConstant										                     # Boolean
 	| StringLiteral											                     # String
 	| (Identifier|Meta)           			      							     # Identifier

internal/parser/planparserv2/parser_visitor.go

@@ -93,7 +93,7 @@ func (v *ParserVisitor) VisitBoolean(ctx *parser.BooleanContext) interface{} {
 
 // VisitInteger translates expr to GenericValue.
 func (v *ParserVisitor) VisitInteger(ctx *parser.IntegerContext) interface{} {
-	literal := ctx.GetText()
+	literal := ctx.IntegerConstant().GetText()
 	i, err := strconv.ParseInt(literal, 0, 64)
 	if err != nil {
 		return err
@@ -113,7 +113,7 @@ func (v *ParserVisitor) VisitInteger(ctx *parser.IntegerContext) interface{} {
 
 // VisitFloating translates expr to GenericValue.
 func (v *ParserVisitor) VisitFloating(ctx *parser.FloatingContext) interface{} {
-	literal := ctx.GetText()
+	literal := ctx.FloatingConstant().GetText()
 	f, err := strconv.ParseFloat(literal, 64)
 	if err != nil {
 		return err

internal/parser/planparserv2/plan_parser_v2_test.go

@@ -182,7 +182,6 @@ func TestExpr_UnaryRange(t *testing.T) {
 		`VarCharField <= "str7"`,
 		`JSONField["A"] > 10`,
 		`$meta["A"] > 10`,
-		`A == -9223372036854775808`,
 	}
 	for _, exprStr := range exprStrs {
 		assertValidExpr(t, helper, exprStr)
@@ -638,6 +637,7 @@ func TestExpr_Invalid(t *testing.T) {
 		`"str" != false`,
 		`VarCharField != FloatField`,
 		`FloatField == VarCharField`,
+		`A == -9223372036854775808`,
 		// ---------------------- relational --------------------
 		//`not_in_schema < 1`, // maybe in json
 		//`1 <= not_in_schema`, // maybe in json