SQL Expressions: (Chore) Update code for latest plugin-sdk data pkg (#100425)

Use new NilAt and SetRefId methods

pkg/expr/sql/db_test.go

@@ -45,11 +45,11 @@ func TestQueryFrames(t *testing.T) {
 			name:  "query all rows from single input frame",
 			query: `SELECT * FROM inputFrameRefId LIMIT 1;`,
 			input_frames: []*data.Frame{
-				setRefID(data.NewFrame(
+				data.NewFrame(
 					"",
 					//nolint:misspell
 					data.NewField("OSS Projects with Typos", nil, []string{"Garfana", "Pormetheus"}),
-				), "inputFrameRefId"),
+				).SetRefID("inputFrameRefId"),
 			},
 			expected: data.NewFrame(
 				"sqlExpressionRefId",
@@ -174,8 +174,3 @@ func TestQueryFramesDateTimeSelect(t *testing.T) {
 func p[T any](v T) *T {
 	return &v
 }
-
-func setRefID(f *data.Frame, refID string) *data.Frame {
-	f.RefID = refID
-	return f
-}

pkg/expr/sql/frame_db_conv.go

@@ -410,65 +410,3 @@ func fieldValFromRowVal(fieldType data.FieldType, val interface{}) (interface{},
 		return nil, fmt.Errorf("unsupported field type %s for val %v", fieldType, val)
 	}
 }
-
-// Is the field nilAt the index. Can panic if out of range.
-// TODO: Maybe this should be a method on data.Field?
-func nilAt(field data.Field, at int) bool {
-	if !field.Nullable() {
-		return false
-	}
-
-	switch field.Type() {
-	case data.FieldTypeNullableInt8:
-		v := field.At(at).(*int8)
-		return v == nil
-
-	case data.FieldTypeNullableUint8:
-		v := field.At(at).(*uint8)
-		return v == nil
-
-	case data.FieldTypeNullableInt16:
-		v := field.At(at).(*int16)
-		return v == nil
-
-	case data.FieldTypeNullableUint16:
-		v := field.At(at).(*uint16)
-		return v == nil
-
-	case data.FieldTypeNullableInt32:
-		v := field.At(at).(*int32)
-		return v == nil
-
-	case data.FieldTypeNullableUint32:
-		v := field.At(at).(*uint32)
-		return v == nil
-
-	case data.FieldTypeNullableInt64:
-		v := field.At(at).(*int64)
-		return v == nil
-
-	case data.FieldTypeNullableUint64:
-		v := field.At(at).(*uint64)
-		return v == nil
-
-	case data.FieldTypeNullableFloat64:
-		v := field.At(at).(*float64)
-		return v == nil
-
-	case data.FieldTypeNullableString:
-		v := field.At(at).(*string)
-		return v == nil
-
-	case data.FieldTypeNullableTime:
-		v := field.At(at).(*time.Time)
-		return v == nil
-
-	case data.FieldTypeNullableBool:
-		v := field.At(at).(*bool)
-		return v == nil
-
-	default:
-		// Either it's not a nullable type or it's unsupported
-		return false
-	}
-}

pkg/expr/sql/frame_table.go

@@ -85,7 +85,7 @@ func (ri *rowIter) Next(_ *mysql.Context) (mysql.Row, error) {
 	// the value from each column at the current row index.
 	row := make(mysql.Row, len(ri.ft.Frame.Fields))
 	for colIndex, field := range ri.ft.Frame.Fields {
-		if nilAt(*field, ri.row) {
+		if field.NilAt(ri.row) {
 			continue
 		}
 		row[colIndex], _ = field.ConcreteAt(ri.row)