improve slice handling

db/dialect_clickhouse.go

@@ -190,22 +190,19 @@ func convertToType(value string, valueType reflect.Type) (any, error) {
 	case reflect.String:
 		return value, nil
 	case reflect.Slice:
-		// in case the slice values are wrapped in single quotes replace them to use json.Unmarshal which requires double quotes
-		value = strings.ReplaceAll(value, "'", "\"")
-		var anySlice []any
-		if err := json.Unmarshal([]byte(value), &anySlice); err != nil {
-			return "", fmt.Errorf("could not unmarshal slice value %q: %w", value, err)
+		if valueType.Elem().Kind() == reflect.Struct || valueType.Elem().Kind() == reflect.Ptr {
+			return nil, fmt.Errorf("%q is not supported as Clickhouse Array type", valueType.Elem().Name())
 		}
 
-		for i, v := range anySlice {
-			convertedType, err := convertToType(fmt.Sprintf("%v", v), valueType.Elem())
-			if err != nil {
-				return "", fmt.Errorf("converting value %q to type %q in column %q: %w", v, valueType.Elem(), i, err)
-			}
-			anySlice[i] = convertedType
+		// in case the slice values are wrapped in single quotes, replace them to use json.Unmarshal which requires double quotes
+		value = strings.ReplaceAll(value, "'", "\"")
+
+		res := reflect.New(reflect.SliceOf(valueType.Elem()))
+		if err := json.Unmarshal([]byte(value), res.Interface()); err != nil {
+			return "", fmt.Errorf("could not unmarshal slice value %q: %w", value, err)
 		}
 
-		return anySlice, nil
+		return res.Elem().Interface(), nil
 	case reflect.Bool:
 		return strconv.ParseBool(value)
 	case reflect.Int: