Function deserializeImpl

src/DataTypes/Serializations/SerializationBool.cpp:154–201

}

void deserializeImpl(
    IColumn & column, ReadBuffer & istr, const FormatSettings & settings, std::function<bool(ReadBuffer &)> check_end_of_value)
{
    ColumnUInt8 * col = checkAndGetDeserializeColumnType(column);

    PeekableReadBuffer buf(istr);
    buf.setCheckpoint();
    if (checkString(settings.bool_true_representation, buf) && check_end_of_value(buf))
    {
        col->insert(true);
        return;
    }

    buf.rollbackToCheckpoint();
    if (checkString(settings.bool_false_representation, buf) && check_end_of_value(buf))
    {
        col->insert(false);
        buf.dropCheckpoint();
        if (buf.hasUnreadData())
            throw Exception(
                ErrorCodes::CANNOT_PARSE_BOOL,
                "Cannot continue parsing after parsed bool value because it will result in the loss of some data. It may happen if "
                "bool_true_representation or bool_false_representation contains some delimiters of input format");
        return;
    }

    buf.rollbackToCheckpoint();
    if (tryDeserializeAllVariants(col, buf) && check_end_of_value(buf))
    {
        buf.dropCheckpoint();
        if (buf.hasUnreadData())
            throw Exception(
                ErrorCodes::CANNOT_PARSE_BOOL,
                "Cannot continue parsing after parsed bool value because it will result in the loss of some data. It may happen if "
                "bool_true_representation or bool_false_representation contains some delimiters of input format");
        return;
    }

    buf.makeContinuousMemoryFromCheckpointToPos();
    buf.rollbackToCheckpoint();
    throw Exception(
        ErrorCodes::CANNOT_PARSE_BOOL,
        "Cannot parse boolean value here: '{}', should be '{}' or '{}' controlled by setting bool_true_representation and "
        "bool_false_representation or one of "
        "True/False/T/F/Y/N/Yes/No/On/Off/Enable/Disable/Enabled/Disabled/1/0",
        String(buf.position(), std::min(10lu, buf.available())),
        settings.bool_true_representation, settings.bool_false_representation);
}

}