Struct Function 

pub struct Function {
    pub name: ObjectName,
    pub uses_odbc_syntax: bool,
    pub parameters: FunctionArguments,
    pub args: FunctionArguments,
    pub filter: Option<Box<Expr>>,
    pub null_treatment: Option<NullTreatment>,
    pub over: Option<WindowType>,
    pub within_group: Vec<OrderByExpr>,
}

A function call

Fields

name: ObjectName

The function name (may be qualified).

uses_odbc_syntax: bool

Flags whether this function call uses the ODBC syntax.

Example:

SELECT {fn CONCAT('foo', 'bar')}

parameters: FunctionArguments

The parameters to the function, including any options specified within the delimiting parentheses.

Example:

HISTOGRAM(0.5, 0.6)(x, y)

ClickHouse

args: FunctionArguments

The arguments to the function, including any options specified within the delimiting parentheses.

filter: Option<Box<Expr>>

e.g. x > 5 in COUNT(x) FILTER (WHERE x > 5)

null_treatment: Option<NullTreatment>

Indicates how NULLs should be handled in the calculation.

Example:

FIRST_VALUE( <expr> ) [ { IGNORE | RESPECT } NULLS ] OVER ...

Snowflake

over: Option<WindowType>

The OVER clause, indicating a window function call.

within_group: Vec<OrderByExpr>

A clause used with certain aggregate functions to control the ordering within grouped sets before the function is applied.

Syntax:

<aggregate_function>(expression) WITHIN GROUP (ORDER BY key [ASC | DESC], ...)

Trait Implementations

impl Clone for Function

fn clone(&self) -> Function

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Function

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

Formats the value using the given formatter.

impl Display for Function

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

Formats the value using the given formatter.

impl Eq for Function

impl From<Function> for Statement

fn from(f: Function) -> Statement

Converts to this type from the input type.

impl Hash for Function

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Function

fn cmp(&self, other: &Function) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Function

fn eq(&self, other: &Function) -> 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 PartialOrd for Function

fn partial_cmp(&self, other: &Function) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Spanned for Function

fn span(&self) -> Span

Return the Span (the minimum and maximum Location) for this AST node, by recursively combining the spans of its children.

impl StructuralPartialEq for Function

impl Visit for Function

fn visit<V>(&self, visitor: &mut V) -> ControlFlow<<V as Visitor>::Break>

where V: Visitor,

Visit this node with the provided Visitor.

impl VisitMut for Function

fn visit<V>(&mut self, visitor: &mut V) -> ControlFlow<<V as VisitorMut>::Break>

where V: VisitorMut,

Mutably visit this node with the provided VisitorMut.