Struct datafusion::functions_array::concat::ArrayPrepend
source · pub struct ArrayPrepend { /* private fields */ }
Implementations§
source§impl ArrayPrepend
impl ArrayPrepend
pub fn new() -> ArrayPrepend
Trait Implementations§
source§impl Debug for ArrayPrepend
impl Debug for ArrayPrepend
source§impl Default for ArrayPrepend
impl Default for ArrayPrepend
source§fn default() -> ArrayPrepend
fn default() -> ArrayPrepend
Returns the “default value” for a type. Read more
source§impl ScalarUDFImpl for ArrayPrepend
impl ScalarUDFImpl for ArrayPrepend
source§fn signature(&self) -> &Signature
fn signature(&self) -> &Signature
Returns the function’s
Signature
for information about what input
types are accepted and the function’s Volatility.source§fn return_type(
&self,
arg_types: &[DataType]
) -> Result<DataType, DataFusionError>
fn return_type( &self, arg_types: &[DataType] ) -> Result<DataType, DataFusionError>
source§fn invoke(
&self,
args: &[ColumnarValue]
) -> Result<ColumnarValue, DataFusionError>
fn invoke( &self, args: &[ColumnarValue] ) -> Result<ColumnarValue, DataFusionError>
Invoke the function on
args
, returning the appropriate result Read moresource§fn aliases(&self) -> &[String]
fn aliases(&self) -> &[String]
Returns any aliases (alternate names) for this function. Read more
source§fn return_type_from_exprs(
&self,
_args: &[Expr],
_schema: &dyn ExprSchema,
arg_types: &[DataType]
) -> Result<DataType, DataFusionError>
fn return_type_from_exprs( &self, _args: &[Expr], _schema: &dyn ExprSchema, arg_types: &[DataType] ) -> Result<DataType, DataFusionError>
source§fn invoke_no_args(
&self,
_number_rows: usize
) -> Result<ColumnarValue, DataFusionError>
fn invoke_no_args( &self, _number_rows: usize ) -> Result<ColumnarValue, DataFusionError>
Invoke the function without
args
, instead the number of rows are provided,
returning the appropriate result.source§fn monotonicity(&self) -> Result<Option<Vec<Option<bool>>>, DataFusionError>
fn monotonicity(&self) -> Result<Option<Vec<Option<bool>>>, DataFusionError>
This function specifies monotonicity behaviors for User defined scalar functions.
source§fn simplify(
&self,
args: Vec<Expr>,
_info: &dyn SimplifyInfo
) -> Result<ExprSimplifyResult, DataFusionError>
fn simplify( &self, args: Vec<Expr>, _info: &dyn SimplifyInfo ) -> Result<ExprSimplifyResult, DataFusionError>
Optionally apply per-UDF simplification / rewrite rules. Read more
source§fn short_circuits(&self) -> bool
fn short_circuits(&self) -> bool
Returns true if some of this
exprs
subexpressions may not be evaluated
and thus any side effects (like divide by zero) may not be encountered
Setting this to true prevents certain optimizations such as common subexpression eliminationAuto Trait Implementations§
impl Freeze for ArrayPrepend
impl RefUnwindSafe for ArrayPrepend
impl Send for ArrayPrepend
impl Sync for ArrayPrepend
impl Unpin for ArrayPrepend
impl UnwindSafe for ArrayPrepend
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<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