feat: Support negative numbers in LogQL (#13091)

Author: benclive

pkg/logql/syntax/ast_test.go

@@ -49,6 +49,7 @@ func Test_logSelectorExpr_String(t *testing.T) {
 		{`{foo="bar"} |= "baz" |~ "blip" != "flip" !~ "flap" | logfmt | b=ip("127.0.0.1") | level="error" | c=ip("::1")`, true}, // chain inside label filters.
 		{`{foo="bar"} |= "baz" |~ "blip" != "flip" !~ "flap" | regexp "(?P<foo>foo|bar)"`, true},
 		{`{foo="bar"} |= "baz" |~ "blip" != "flip" !~ "flap" | regexp "(?P<foo>foo|bar)" | ( ( foo<5.01 , bar>20ms ) or foo="bar" ) | line_format "blip{{.boop}}bap" | label_format foo=bar,bar="blip{{.blop}}"`, true},
+		{`{foo="bar"} | logfmt | counter>-1 | counter>=-1 | counter<-1 | counter<=-1 | counter!=-1 | counter==-1`, true},
 	}
 
 	for _, tt := range tests {
@@ -76,6 +77,7 @@ func Test_logSelectorExpr_String(t *testing.T) {
 func Test_SampleExpr_String(t *testing.T) {
 	t.Parallel()
 	for _, tc := range []string{
+		`rate( ( {job="mysql"} |="error" !="timeout" ) [10s] )>-1`,
 		`rate( ( {job="mysql"} |="error" !="timeout" ) [10s] )`,
 		`absent_over_time( ( {job="mysql"} |="error" !="timeout" ) [10s] )`,
 		`absent_over_time( ( {job="mysql"} |="error" !="timeout" ) [10s] offset 10d )`,
@@ -556,6 +558,27 @@ func Test_FilterMatcher(t *testing.T) {
 			},
 			[]linecheck{{"foo", false}, {"bar", false}, {"none", true}},
 		},
+		{
+			`{app="foo"} | logfmt | duration > -1s`,
+			[]*labels.Matcher{
+				mustNewMatcher(labels.MatchEqual, "app", "foo"),
+			},
+			[]linecheck{{"duration=5m", true}, {"duration=1s", true}, {"duration=0s", true}, {"duration=-5m", false}},
+		},
+		{
+			`{app="foo"} | logfmt | count > -1`,
+			[]*labels.Matcher{
+				mustNewMatcher(labels.MatchEqual, "app", "foo"),
+			},
+			[]linecheck{{"count=5", true}, {"count=1", true}, {"count=0", true}, {"count=-5", false}},
+		},
+		{
+			`{app="foo"} | logfmt | counter <= -1`,
+			[]*labels.Matcher{
+				mustNewMatcher(labels.MatchEqual, "app", "foo"),
+			},
+			[]linecheck{{"counter=1", false}, {"counter=0", false}, {"counter=-1", true}, {"counter=-2", true}},
+		},
 	} {
 		tt := tt
 		t.Run(tt.q, func(t *testing.T) {

pkg/logql/syntax/expr.y

@@ -400,13 +400,13 @@ bytesFilter:
     ;
 
 numberFilter:
-      IDENTIFIER GT NUMBER      { $$ = log.NewNumericLabelFilter(log.LabelFilterGreaterThan, $1, mustNewFloat($3))}
-    | IDENTIFIER GTE NUMBER     { $$ = log.NewNumericLabelFilter(log.LabelFilterGreaterThanOrEqual, $1, mustNewFloat($3))}
-    | IDENTIFIER LT NUMBER      { $$ = log.NewNumericLabelFilter(log.LabelFilterLesserThan, $1, mustNewFloat($3))}
-    | IDENTIFIER LTE NUMBER     { $$ = log.NewNumericLabelFilter(log.LabelFilterLesserThanOrEqual, $1, mustNewFloat($3))}
-    | IDENTIFIER NEQ NUMBER     { $$ = log.NewNumericLabelFilter(log.LabelFilterNotEqual, $1, mustNewFloat($3))}
-    | IDENTIFIER EQ NUMBER      { $$ = log.NewNumericLabelFilter(log.LabelFilterEqual, $1, mustNewFloat($3))}
-    | IDENTIFIER CMP_EQ NUMBER  { $$ = log.NewNumericLabelFilter(log.LabelFilterEqual, $1, mustNewFloat($3))}
+      IDENTIFIER GT literalExpr      { $$ = log.NewNumericLabelFilter(log.LabelFilterGreaterThan, $1,  $3.Val)}
+    | IDENTIFIER GTE literalExpr     { $$ = log.NewNumericLabelFilter(log.LabelFilterGreaterThanOrEqual, $1,$3.Val)}
+    | IDENTIFIER LT literalExpr      { $$ = log.NewNumericLabelFilter(log.LabelFilterLesserThan, $1, $3.Val)}
+    | IDENTIFIER LTE literalExpr     { $$ = log.NewNumericLabelFilter(log.LabelFilterLesserThanOrEqual, $1, $3.Val)}
+    | IDENTIFIER NEQ literalExpr     { $$ = log.NewNumericLabelFilter(log.LabelFilterNotEqual, $1, $3.Val)}
+    | IDENTIFIER EQ literalExpr      { $$ = log.NewNumericLabelFilter(log.LabelFilterEqual, $1, $3.Val)}
+    | IDENTIFIER CMP_EQ literalExpr  { $$ = log.NewNumericLabelFilter(log.LabelFilterEqual, $1, $3.Val)}
     ;
 
 dropLabel: