Struct AggregateOperation 

pub struct AggregateOperation<M: Model, E: QueryEngine> { /* private fields */ }

Aggregate operation builder.

Implementations

impl<M: Model, E: QueryEngine> AggregateOperation<M, E>

pub fn new() -> Self

Create a new aggregate operation.

pub fn count(self) -> Self

Add a count of all rows.

pub fn count_column(self, column: impl Into<String>) -> Self

Add a count of non-null values in a column.

pub fn count_distinct(self, column: impl Into<String>) -> Self

Add a count of distinct values in a column.

pub fn sum(self, column: impl Into<String>) -> Self

Add sum of a numeric column.

pub fn avg(self, column: impl Into<String>) -> Self

Add average of a numeric column.

pub fn min(self, column: impl Into<String>) -> Self

Add minimum of a column.

pub fn max(self, column: impl Into<String>) -> Self

Add maximum of a column.

pub fn where(self, filter: impl Into<Filter>) -> Self

Add a filter condition.

pub fn build_sql(&self) -> (String, Vec<FilterValue>)

Build the SQL for this operation.

pub async fn exec(self, _engine: &E) -> QueryResult<AggregateResult>

Execute the aggregate operation.

Trait Implementations

impl<M: Debug + Model, E: Debug + QueryEngine> Debug for AggregateOperation<M, E>

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

Formats the value using the given formatter.

impl<M: Model, E: QueryEngine> Default for AggregateOperation<M, E>

fn default() -> Self

Returns the “default value” for a type.