Struct PartialRowUpdate 

pub struct PartialRowUpdate {
    pub total_columns: u16,
    pub column_mask: Vec<u8>,
    pub values: Vec<Option<Vec<u8>>>,
}

A partial row update containing only changed columns

Used for selective column updates to reduce bandwidth when only a few columns change in a wide table.

Fields

total_columns: u16

Total number of columns in the full row (for bitmap sizing)

column_mask: Vec<u8>

Bitmap indicating which columns are present (1 bit per column) Bit 0 = column 0, Bit 1 = column 1, etc. A set bit means the column value is included in values

values: Vec<Option<Vec<u8>>>

Values for columns with set bits in column_mask, in column order None = NULL, Some(bytes) = value data

Implementations

impl PartialRowUpdate

pub fn new( total_columns: u16, present_columns: &[u16], values: Vec<Option<Vec<u8>>>, ) -> Self

Create a new partial row update

Arguments

• total_columns - Total number of columns in the full row
• present_columns - Indices of columns that are present in this update
• values - Values for the present columns, in same order as present_columns

pub fn is_column_present(&self, col_idx: u16) -> bool

Check if a column is present in this update

pub fn present_column_count(&self) -> usize

Get the number of present columns

Trait Implementations

impl Clone for PartialRowUpdate

fn clone(&self) -> PartialRowUpdate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PartialRowUpdate

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

Formats the value using the given formatter.

impl PartialEq for PartialRowUpdate

fn eq(&self, other: &PartialRowUpdate) -> 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 StructuralPartialEq for PartialRowUpdate