Struct AggregateFunction 

pub struct AggregateFunction {
    pub func_kind: AggregateFunctionKind,
    pub args: Vec<Expr>,
    pub distinct: bool,
}

Fields

func_kind: AggregateFunctionKind

the function kind

args: Vec<Expr>

List of expressions to feed to the functions as arguments

distinct: bool

Whether this is a DISTINCT aggregation or not

Trait Implementations

impl Clone for AggregateFunction

fn clone(&self) -> AggregateFunction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AggregateFunction

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

Formats the value using the given formatter.

impl Display for AggregateFunction

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

Formats the value using the given formatter.

impl ExprTrait for AggregateFunction

fn data_type(&self, _input_schema: &Schema) -> QuillSQLResult<DataType>

Get the data type of this expression, given the schema of the input

fn nullable(&self, _input_schema: &Schema) -> QuillSQLResult<bool>

Determine whether this expression is nullable, given the schema of the input

fn evaluate(&self, tuple: &Tuple) -> QuillSQLResult<ScalarValue>

Evaluate an expression against a Tuple

fn to_column(&self, input_schema: &Schema) -> QuillSQLResult<Column>

convert to a column with respect to a schema

impl PartialEq for AggregateFunction

fn eq(&self, other: &AggregateFunction) -> 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 Eq for AggregateFunction

impl StructuralPartialEq for AggregateFunction