Struct SelectiveColumnConfig 

pub struct SelectiveColumnConfig {
    pub enabled: bool,
    pub pk_columns: Vec<usize>,
    pub min_changed_columns: usize,
    pub max_changed_columns_ratio: f64,
}

Configuration for selective column updates

This config controls when selective column updates (0xF7 messages) are used instead of full row updates. Selective updates only send changed columns plus primary key columns, reducing bandwidth for wide tables with few changes.

Fields

enabled: bool

Enable selective column updates

pk_columns: Vec<usize>

Column indices that are primary key columns (always included) This is per-subscription and not configurable via config file

min_changed_columns: usize

Minimum columns that must change to use selective update If fewer columns change, send full row instead

max_changed_columns_ratio: f64

Maximum ratio of changed columns before falling back to full row E.g., 0.5 means if >50% of columns changed, send full row instead

Implementations

impl SelectiveColumnConfig

pub fn with_pk_columns(&self, pk_columns: Vec<usize>) -> Self

Create a copy of this config with the specified pk_columns

Useful for creating subscription-specific configs from a server-level template.

Trait Implementations

impl Clone for SelectiveColumnConfig

fn clone(&self) -> SelectiveColumnConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SelectiveColumnConfig

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

Formats the value using the given formatter.

impl Default for SelectiveColumnConfig

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for SelectiveColumnConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for SelectiveColumnConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.