[Fix] OR statements not being evaluated as part of nested line filters

pkg/logql/syntax/ast.go

@@ -353,6 +353,8 @@ func newNestedLineFilterExpr(left *LineFilterExpr, right *LineFilterExpr) *LineF
 	return &LineFilterExpr{
 		Left:       left,
 		LineFilter: right.LineFilter,
+		Or:         right.Or,
+		IsOrChild:  right.IsOrChild,
 	}
 }
 

pkg/logql/syntax/ast_test.go

@@ -383,6 +383,13 @@ func Test_FilterMatcher(t *testing.T) {
 			},
 			[]linecheck{{"foo", true}, {"bar", true}, {"none", false}},
 		},
+		{
+			`{app="foo"} |= "foo" or "bar" |= "buzz" or "fizz"`,
+			[]*labels.Matcher{
+				mustNewMatcher(labels.MatchEqual, "app", "foo"),
+			},
+			[]linecheck{{"foo buzz", true}, {"bar fizz", true}, {"foo", false}, {"bar", false}, {"none", false}},
+		},
 		{
 			`{app="foo"} != "foo" or "bar"`,
 			[]*labels.Matcher{
@@ -496,6 +503,14 @@ func TestStringer(t *testing.T) {
 			in:  `{app="foo"} |~ "foo" or "bar" or "baz"`,
 			out: `{app="foo"} |~ "foo" or "bar" or "baz"`,
 		},
+		{
+			in:  `{app="foo"} |= "foo" or "bar" |= "buzz" or "fizz"`,
+			out: `{app="foo"} |= "foo" or "bar" |= "buzz" or "fizz"`,
+		},
+		{
+			out: `{app="foo"} |= "foo" or "bar" |~ "buzz|fizz"`,
+			in:  `{app="foo"} |= "foo" or "bar" |~ "buzz|fizz"`,
+		},
 		{
 			in:  `{app="foo"} |= ip("127.0.0.1") or "foo"`,
 			out: `{app="foo"} |= ip("127.0.0.1") or "foo"`,

pkg/logql/syntax/parser_test.go

@@ -3138,6 +3138,41 @@ var ParseTestCases = []struct {
 			},
 		},
 	},
+	{
+		in: `{app="foo"} |= "foo" or "bar" |= "buzz" or "fizz"`,
+		exp: &PipelineExpr{
+			Left: newMatcherExpr([]*labels.Matcher{mustNewMatcher(labels.MatchEqual, "app", "foo")}),
+			MultiStages: MultiStageExpr{
+				&LineFilterExpr{
+					Left: newOrLineFilter(
+						&LineFilterExpr{
+							LineFilter: LineFilter{
+								Ty:    labels.MatchEqual,
+								Match: "foo",
+							},
+						},
+						&LineFilterExpr{
+							LineFilter: LineFilter{
+								Ty:    labels.MatchEqual,
+								Match: "bar",
+							},
+						}),
+					LineFilter: LineFilter{
+						Ty:    labels.MatchEqual,
+						Match: "buzz",
+					},
+					Or: &LineFilterExpr{
+						LineFilter: LineFilter{
+							Ty:    labels.MatchEqual,
+							Match: "fizz",
+						},
+						IsOrChild: true,
+					},
+					IsOrChild: false,
+				},
+			},
+		},
+	},
 }
 
 func TestParse(t *testing.T) {