Function tryCastStringToStruct

src/function/cast_from_string_functions.cpp:590–649

}

static bool tryCastStringToStruct(const char* input, uint64_t len, ValueVector* vector,
    uint64_t rowToAdd, const CSVOption* option) {
    // default values to NULL
    auto fieldVectors = StructVector::getFieldVectors(vector);
    for (auto& fieldVector : fieldVectors) {
        fieldVector->setNull(rowToAdd, true);
    }

    // check if start with {
    auto end = input + len;
    const auto& type = vector->dataType;
    skipWhitespace(input, end);
    if (input == end || *input != '{') {
        return false;
    }
    skipWhitespace(++input, end);

    if (input == end) { // no closing bracket
        return false;
    }
    if (*input == '}') {
        skipWhitespace(++input, end);
        return input == end;
    }

    bool closeBracket = false;
    while (input < end) {
        auto keyStart = input;
        if (!parseStructFieldName(input, end)) { // find key
            return false;
        }
        auto keyEnd = input;
        trimRightWhitespace(keyStart, keyEnd);
        trimQuotes(keyStart, keyEnd);
        auto fieldIdx = StructType::getFieldIdx(type, std::string{keyStart, keyEnd});
        if (fieldIdx == INVALID_STRUCT_FIELD_IDX) {
            throw ParserException{"Invalid struct field name: " + std::string{keyStart, keyEnd}};
        }

        skipWhitespace(++input, end);
        auto valStart = input;
        if (!parseStructFieldValue(input, end, option, closeBracket)) { // find value
            return false;
        }
        auto valEnd = input;
        trimRightWhitespace(valStart, valEnd);
        trimQuotes(valStart, valEnd);
        skipWhitespace(++input, end);

        auto fieldVector = StructVector::getFieldVector(vector, fieldIdx).get();
        fieldVector->setNull(rowToAdd, false);
        CastString::copyStringToVector(fieldVector, rowToAdd,
            std::string_view{valStart, (uint32_t)(valEnd - valStart)}, option);

        if (closeBracket) {
            return (input == end);
        }
    }