Enum datafusion::sql::sqlparser::ast::DeclareAssignment
source · pub enum DeclareAssignment {
Expr(Box<Expr>),
Default(Box<Expr>),
DuckAssignment(Box<Expr>),
For(Box<Expr>),
}
Expand description
Represents an expression assignment within a variable DECLARE
statement.
Examples:
DECLARE variable_name := 42
DECLARE variable_name DEFAULT 42
Variants§
Expr(Box<Expr>)
Plain expression specified.
Default(Box<Expr>)
Expression assigned via the DEFAULT
keyword
DuckAssignment(Box<Expr>)
Expression assigned via the :=
syntax
Example:
DECLARE variable_name := 42;
For(Box<Expr>)
Expression via the FOR
keyword
Example:
DECLARE c1 CURSOR FOR res
Trait Implementations§
source§impl Clone for DeclareAssignment
impl Clone for DeclareAssignment
source§fn clone(&self) -> DeclareAssignment
fn clone(&self) -> DeclareAssignment
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for DeclareAssignment
impl Debug for DeclareAssignment
source§impl Display for DeclareAssignment
impl Display for DeclareAssignment
source§impl Hash for DeclareAssignment
impl Hash for DeclareAssignment
source§impl Ord for DeclareAssignment
impl Ord for DeclareAssignment
source§fn cmp(&self, other: &DeclareAssignment) -> Ordering
fn cmp(&self, other: &DeclareAssignment) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Compares and returns the maximum of two values. Read more
source§impl PartialEq for DeclareAssignment
impl PartialEq for DeclareAssignment
source§fn eq(&self, other: &DeclareAssignment) -> bool
fn eq(&self, other: &DeclareAssignment) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for DeclareAssignment
impl PartialOrd for DeclareAssignment
source§fn partial_cmp(&self, other: &DeclareAssignment) -> Option<Ordering>
fn partial_cmp(&self, other: &DeclareAssignment) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for
self
and other
) and is used by the <=
operator. Read moresource§impl Visit for DeclareAssignment
impl Visit for DeclareAssignment
source§impl VisitMut for DeclareAssignment
impl VisitMut for DeclareAssignment
fn visit<V>(&mut self, visitor: &mut V) -> ControlFlow<<V as VisitorMut>::Break>where
V: VisitorMut,
impl Eq for DeclareAssignment
impl StructuralPartialEq for DeclareAssignment
Auto Trait Implementations§
impl Freeze for DeclareAssignment
impl RefUnwindSafe for DeclareAssignment
impl Send for DeclareAssignment
impl Sync for DeclareAssignment
impl Unpin for DeclareAssignment
impl UnwindSafe for DeclareAssignment
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more