fix: support indexing more types (#36401)

Co-authored-by: Tyler Helmuth <12352919+TylerHelmuth@users.noreply.github.com>
Co-authored-by: Evan Bradley <11745660+evan-bradley@users.noreply.github.com>

.chloggen/index_more_types.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: pkg/ottl
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Allow indexing []int64, []float64, []bool, and []byte slices
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [29441]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: It should now be possible to index all slice types
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

pkg/ottl/expression.go

@@ -120,6 +120,26 @@ func (g exprGetter[K]) Get(ctx context.Context, tCtx K) (any, error) {
 				if err != nil {
 					return nil, err
 				}
+			case []bool:
+				result, err = getElementByIndex(r, k.Int)
+				if err != nil {
+					return nil, err
+				}
+			case []float64:
+				result, err = getElementByIndex(r, k.Int)
+				if err != nil {
+					return nil, err
+				}
+			case []int64:
+				result, err = getElementByIndex(r, k.Int)
+				if err != nil {
+					return nil, err
+				}
+			case []byte:
+				result, err = getElementByIndex(r, k.Int)
+				if err != nil {
+					return nil, err
+				}
 			default:
 				return nil, fmt.Errorf("type, %T, does not support int indexing", result)
 			}

pkg/ottl/expression_test.go

@@ -69,6 +69,46 @@ func basicSliceString() (ExprFunc[any], error) {
 	}, nil
 }
 
+func basicSliceBool() (ExprFunc[any], error) {
+	return func(_ context.Context, _ any) (any, error) {
+		return []any{
+			[]bool{
+				true,
+			},
+		}, nil
+	}, nil
+}
+
+func basicSliceInteger() (ExprFunc[any], error) {
+	return func(_ context.Context, _ any) (any, error) {
+		return []any{
+			[]int64{
+				1,
+			},
+		}, nil
+	}, nil
+}
+
+func basicSliceFloat() (ExprFunc[any], error) {
+	return func(_ context.Context, _ any) (any, error) {
+		return []any{
+			[]float64{
+				1,
+			},
+		}, nil
+	}, nil
+}
+
+func basicSliceByte() (ExprFunc[any], error) {
+	return func(_ context.Context, _ any) (any, error) {
+		return []any{
+			[]byte{
+				byte('p'),
+			},
+		}, nil
+	}, nil
+}
+
 func Test_newGetter(t *testing.T) {
 	tests := []struct {
 		name string
@@ -266,6 +306,82 @@ func Test_newGetter(t *testing.T) {
 			},
 			want: "pass",
 		},
+		{
+			name: "function call nested SliceBool",
+			val: value{
+				Literal: &mathExprLiteral{
+					Converter: &converter{
+						Function: "SliceBool",
+						Keys: []key{
+							{
+								Int: ottltest.Intp(0),
+							},
+							{
+								Int: ottltest.Intp(0),
+							},
+						},
+					},
+				},
+			},
+			want: true,
+		},
+		{
+			name: "function call nested SliceInteger",
+			val: value{
+				Literal: &mathExprLiteral{
+					Converter: &converter{
+						Function: "SliceInteger",
+						Keys: []key{
+							{
+								Int: ottltest.Intp(0),
+							},
+							{
+								Int: ottltest.Intp(0),
+							},
+						},
+					},
+				},
+			},
+			want: 1,
+		},
+		{
+			name: "function call nested SliceFloat",
+			val: value{
+				Literal: &mathExprLiteral{
+					Converter: &converter{
+						Function: "SliceFloat",
+						Keys: []key{
+							{
+								Int: ottltest.Intp(0),
+							},
+							{
+								Int: ottltest.Intp(0),
+							},
+						},
+					},
+				},
+			},
+			want: 1.0,
+		},
+		{
+			name: "function call nested SliceByte",
+			val: value{
+				Literal: &mathExprLiteral{
+					Converter: &converter{
+						Function: "SliceByte",
+						Keys: []key{
+							{
+								Int: ottltest.Intp(0),
+							},
+							{
+								Int: ottltest.Intp(0),
+							},
+						},
+					},
+				},
+			},
+			want: byte('p'),
+		},
 		{
 			name: "enum",
 			val: value{
@@ -562,6 +678,10 @@ func Test_newGetter(t *testing.T) {
 		createFactory("PSlice", &struct{}{}, pslice),
 		createFactory("Slice", &struct{}{}, basicSlice),
 		createFactory("SliceString", &struct{}{}, basicSliceString),
+		createFactory("SliceBool", &struct{}{}, basicSliceBool),
+		createFactory("SliceInteger", &struct{}{}, basicSliceInteger),
+		createFactory("SliceFloat", &struct{}{}, basicSliceFloat),
+		createFactory("SliceByte", &struct{}{}, basicSliceByte),
 	)
 
 	p, _ := NewParser[any](