Struct NullBitmap

pub struct NullBitmap<T, U: AsRef<[u8]> = Vec<u8>>(/* private fields */);

Null-bitmap.

http://dev.mysql.com/doc/internals/en/null-bitmap.html

Implementations

impl<T: SerializationSide> NullBitmap<T, Vec<u8>>

pub fn new(num_columns: usize) -> Self

Creates new null-bitmap for a given number of columns.

pub fn read(input: &mut &[u8], num_columns: usize) -> Self

Will read null-bitmap for a given number of columns from input.

impl<T: SerializationSide, U: AsRef<[u8]>> NullBitmap<T, U>

pub fn bitmap_len(num_columns: usize) -> usize

pub fn from_bytes(bytes: U) -> Self

Creates new null-bitmap from given bytes.

pub fn is_null(&self, column_index: usize) -> bool

Returns true if given column is NULL in this NullBitmap.

impl<T: SerializationSide, U: AsRef<[u8]> + AsMut<[u8]>> NullBitmap<T, U>

pub fn set(&mut self, column_index: usize, is_null: bool)

Sets flag value for given column.

Trait Implementations

impl<T, U: AsRef<[u8]>> AsRef<[u8]> for NullBitmap<T, U>

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl<T: Clone, U: Clone + AsRef<[u8]>> Clone for NullBitmap<T, U>

fn clone(&self) -> NullBitmap<T, U>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug, U: Debug + AsRef<[u8]>> Debug for NullBitmap<T, U>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de, T: SerializationSide> MyDeserialize<'de> for NullBitmap<T, Cow<'de, [u8]>>

const SIZE: Option<usize> = None

Size hint of a serialized value (in bytes), if it’s constant.

type Ctx = usize

Some structs defines deserialization in the context of another value.

fn deserialize(num_columns: Self::Ctx, buf: &mut ParseBuf<'de>) -> Result<Self>

Deserializes self from the given buf.

impl<T: PartialEq, U: PartialEq + AsRef<[u8]>> PartialEq for NullBitmap<T, U>

fn eq(&self, other: &NullBitmap<T, U>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: Eq, U: Eq + AsRef<[u8]>> Eq for NullBitmap<T, U>

impl<T, U: AsRef<[u8]>> StructuralPartialEq for NullBitmap<T, U>