Method isFixedString

src/DataTypes/IDataType.h:436–436

    constexpr bool isString() const { return idx == TypeIndex::String; }
    constexpr bool isFixedString() const { return idx == TypeIndex::FixedString; }
    constexpr bool isStringOrFixedString() const { return isString() || isFixedString(); }

    constexpr bool isUUID() const { return idx == TypeIndex::UUID; }