```
$ 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.
readBinary(T & x, ReadBuffer & buf) { readPODBinary(x, buf); }
inline void readBinary(String & x, ReadBuffer & buf) { readStringBinary(x, buf); }
inline void readBinary(Int128 & x, ReadBuffer & buf) { readPODBinary(x, buf); }
inline void readBinary(Int256 & x, ReadBuffer & buf) { readPODBinary(x, buf); }
inline void readBinary(UInt128 & x, ReadBuffer & buf) { readPODBinary(x, buf); }
inline void readBinary(UInt256 & x, ReadBuffer & buf) { readPODBinary(x, buf); }
inline void readBinary(Decimal32 & x, ReadBuffer & buf) { readPODBinary(x, buf); }
inline void readBinary(Decimal64 & x, ReadBuffer & buf) { readPODBinary(x, buf); }
inline void readBinary(Decimal128 & x, ReadBuffer & buf) { readPODBinary(x, buf); }
inline void readBinary(Decimal256 & x, ReadBuffer & buf) { readPODBinary(x.value, buf); }
inline void readBinary(LocalDate & x, ReadBuffer & buf) { readPODBinary(x, buf); }
template <typename T>
inline std::enable_if_t<is_arithmetic_v<T> && (sizeof(T) <= 8), void>
readBinaryBigEndian(T & x, ReadBuffer & buf)    
{
    readPODBinary(x, buf);
    if constexpr (sizeof(x) == 1)
        return;
    else if constexpr (sizeof(x) == 2)
        x = __builtin_bswap16(x);
    else if constexpr (sizeof(x) == 4)
        x = __builtin_bswap32(x);
    else if constexpr (sizeof(x) == 8)
        x = __builtin_bswap64(x);
}
template <typename T>
inline std::enable_if_t<is_big_int_v<T>, void>