Struct datafusion::physical_expr::expressions::BoolOr

pub struct BoolOr {
    pub data_type: DataType,
    /* private fields */
}

BOOL_OR aggregate expression

Fields

data_type: DataType

Implementations

impl BoolOr

pub fn new( expr: Arc<dyn PhysicalExpr>, name: impl Into<String>, data_type: DataType ) -> BoolOr

Create a new BOOL_OR aggregate function

Trait Implementations

impl AggregateExpr for BoolOr

fn as_any(&self) -> &(dyn Any + 'static)

Return a reference to Any that can be used for downcasting

fn field(&self) -> Result<Field, DataFusionError>

the field of the final result of this aggregation.

fn create_accumulator( &self ) -> Result<Box<dyn Accumulator, Global>, DataFusionError>

the accumulator used to accumulate values from the expressions. the accumulator expects the same number of arguments as expressions and must return states with the same description as state_fields

fn state_fields(&self) -> Result<Vec<Field, Global>, DataFusionError>

the fields that encapsulate the Accumulator’s state the number of fields here equals the number of states that the accumulator contains

fn expressions(&self) -> Vec<Arc<dyn PhysicalExpr>, Global>

expressions that are passed to the Accumulator. Single-column aggregations such as sum return a single value, others (e.g. cov) return many.

fn name(&self) -> &str

Human readable name such as "MIN(c2)". The default implementation returns placeholder text.

fn row_accumulator_supported(&self) -> bool

If the aggregate expression is supported by row format

fn create_row_accumulator( &self, start_index: usize ) -> Result<Box<dyn RowAccumulator, Global>, DataFusionError>

RowAccumulator to access/update row-based aggregation state in-place. Currently, row accumulator only supports states of fixed-sized type.

fn reverse_expr(&self) -> Option<Arc<dyn AggregateExpr>>

Construct an expression that calculates the aggregate in reverse. Typically the “reverse” expression is itself (e.g. SUM, COUNT). For aggregates that do not support calculation in reverse, returns None (which is the default value).

fn create_sliding_accumulator( &self ) -> Result<Box<dyn Accumulator, Global>, DataFusionError>

Creates accumulator implementation that supports retract

fn order_bys(&self) -> Option<&[PhysicalSortExpr]>

Order by requirements for the aggregate function By default it is None (there is no requirement) Order-sensitive aggregators, such as FIRST_VALUE(x ORDER BY y) should implement this

impl Clone for BoolOr

fn clone(&self) -> BoolOr

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BoolOr

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

Formats the value using the given formatter.

impl PartialEq<dyn Any> for BoolOr

fn eq(&self, other: &(dyn Any + 'static)) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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