Struct AggregationState 

pub struct AggregationState { /* private fields */ }

Complete aggregation state for the table.

Tracks which columns have aggregation functions assigned and whether aggregation processing is enabled.

Implementations

impl AggregationState

pub fn new() -> Self

Creates a new empty aggregation state.

Returns

• AggregationState: A new aggregation state with no functions assigned.

pub fn with_enabled(self, enabled: bool) -> Self

Sets whether aggregation is enabled.

Parameters

• enabled: Whether aggregation processing is active.

Returns

• Self: The modified aggregation state.

pub fn is_enabled(&self) -> bool

Returns whether aggregation is enabled.

Returns

• bool: Whether aggregation processing is active.

pub fn get_aggregation( &self, column_id: &ColumnId, ) -> Option<BuiltInAggregation>

Returns the aggregation function for a column.

Parameters

• column_id: The column identifier to look up.

Returns

• Option<BuiltInAggregation>: The assigned aggregation function.

pub fn set_aggregation( &mut self, column_id: ColumnId, function: BuiltInAggregation, )

Sets the aggregation function for a column.

Parameters

• column_id: The column identifier.
• function: The aggregation function to assign.

pub fn remove_aggregation(&mut self, column_id: &ColumnId)

Removes the aggregation function for a column.

Parameters

• column_id: The column identifier to remove.

pub fn clear(&mut self)

Clears all aggregation settings.

pub fn reset(&mut self)

Resets to initial state.

Trait Implementations

impl Clone for AggregationState

fn clone(&self) -> AggregationState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AggregationState

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

Formats the value using the given formatter.

impl Default for AggregationState

fn default() -> AggregationState

Returns the “default value” for a type.

impl PartialEq for AggregationState

fn eq(&self, other: &AggregationState) -> 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 AggregationState