Struct Unnest 

pub struct Unnest {
    pub expr: Box<Expr>,
    pub outer: bool,
}

UNNEST expression.

When outer is true, the unnest should preserve NULL and empty input lists by emitting a single NULL output row for each. When false (the historical default), the behavior is identical to the plain UNNEST(col) SQL form: NULL and empty input lists are dropped from the output.

Fields

expr: Box<Expr>

outer: bool

Outer-unnest behavior: also expand empty input lists into a single NULL output row (in addition to preserving NULL input rows).

Implementations

impl Unnest

pub fn new(expr: Expr) -> Self

Create a new Unnest expression with default (non-outer) semantics.

pub fn new_boxed(boxed: Box<Expr>) -> Self

Create a new Unnest expression with default (non-outer) semantics.

pub fn new_outer(expr: Expr) -> Self

Create a new Unnest expression with outer-unnest semantics: NULL and empty input lists each produce a single NULL output row.

Trait Implementations

impl Clone for Unnest

fn clone(&self) -> Unnest

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Unnest

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

Formats the value using the given formatter.

impl Eq for Unnest

impl Hash for Unnest

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

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 PartialEq for Unnest

fn eq(&self, other: &Unnest) -> bool

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Unnest

fn partial_cmp(&self, other: &Unnest) -> 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 StructuralPartialEq for Unnest