フリー問題

問題文

A binding must pass a selected value into a filter as a string literal. Which serialization function is appropriate here?

選択肢

1. asMeasure(), which converts the selection into a numeric measure in the binding for filtering.
2. No serialization function is needed because bindings always pass strings to the filter in SAQL.
3. asObject(), which is always correct because every binding needs an object. A filter expecting a bare string would receive a structure it cannot parse.
4. asString(), which serializes the value as a string for contexts that expect a string literal.