```
$ echo '20210101,A' | clickhouse-local --input-format CSV --structure 'd Date, s String' --query "SELECT * FROM table"
Code: 27. DB::Exception: Cannot parse input: expected ',' before: '20210101,A\n': 
Row 1:
Column 0,   name: d, type: Date,   ERROR: text "20210101,A" is not like Date

: While executing ParallelParsingBlockInputFormat: While executing File. (CANNOT_PARSE_INPUT_ASSERTION_FAILED)
```

**How to solve**

Disambiguate while parsing by absense of separators between YYYY-MM-DD.
throw Exception("Unexpected symbol '" + std::string(*buf.position(), 1) + "' for key '" + name_of_field.toString() + "'", ErrorCodes::INCORRECT_DATA);
    }
}
Exception readException(ReadBuffer & buf, const String & additional_message, bool remote_exception)
{
    int code = 0;
    String name;
    String message;
    String stack_trace;
    bool has_nested = false;    
    readBinary(code, buf);
    readBinary(name, buf);
    readBinary(message, buf);
    readBinary(stack_trace, buf);
    readBinary(has_nested, buf);
    WriteBufferFromOwnString out;
    if (!additional_message.empty())
        out << additional_message << ". ";
    if (name != "DB::Exception")
        out << name << ". ";
    out << message << ".";
    if (!stack_trace.empty())
        out << " Stack trace:\n\n" << stack_trace;
    return Exception(out.str(), code, remote_exception);
}
void readAndThrowException(ReadBuffer & buf, const String & additional_message)
{
    readException(buf, additional_message).rethrow();
}
void skipToCarriageReturnOrEOF(ReadBuffer & buf)