Bytes Functions and Operators

type

bytes

bytes

A sequence of bytes representing raw data.

There’s a special byte literal:

db>

select b'Hello, world';

{b'Hello, world'}

db>

select b'Hello,\x20world\x01';

{b'Hello, world\x01'}

There are also some generic functions that can operate on bytes:

db>

select contains(b'qwerty', b'42');

{false}

It is possible to cast between bytes and json. Bytes are represented as base64 encoded strings in json.:

db>

select <json>b'Hello EdgeDB!';

{"\"SGVsbG8gRWRnZURCIQ==\""}

db>

select <bytes>to_json("\"SGVsbG8gRWRnZURCIQ==\"");

{b'Hello EdgeDB!'}

operator

bytes[i]

bytes [ int64 ] -> bytes

Bytes indexing.

Examples:

db>

select b'binary \x01\x02\x03\x04 ftw!'[8];

{b'\x02'}

operator

bytes[from:to]

bytes [ int64 : int64 ] -> bytes

Bytes slicing.

Examples:

db>

select b'\x01\x02\x03\x04 ftw!'[2:-1];

{b'\x03\x04 ftw'}

db>

select b'some bytes'[2:-3];

{b'me by'}

operator

bytes ++ bytes

bytes ++ bytes -> bytes

Bytes concatenation.

db>

select b'\x01\x02' ++ b'\x03\x04';

{b'\x01\x02\x03\x04'}

function

bytes_get_bit()

std::bytes_get_bit(bytes: bytes, nth: int64) -> int64

Get the nth bit of the bytes value.

When looking for the nth bit, this function enumerates bits from least to most significant in each byte.

db> 
... 
...

for n in {0, 1, 2, 3, 4, 5, 6, 7,
          8, 9, 10, 11, 12, 13 ,14, 15}
union bytes_get_bit(b'ab', n);

{1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0}