pub struct ClickHouseEval { /* private fields */ }
Expand description
ClickHouseEval
is an escape hatch to pass syntax that DataFusion
does not support directly
to ClickHouse
using the string representation only.
Implementations§
Trait Implementations§
Source§impl Debug for ClickHouseEval
impl Debug for ClickHouseEval
Source§impl Default for ClickHouseEval
impl Default for ClickHouseEval
Source§impl ScalarUDFImpl for ClickHouseEval
impl ScalarUDFImpl for ClickHouseEval
Source§fn return_field_from_args(&self, args: ReturnFieldArgs<'_>) -> Result<FieldRef>
fn return_field_from_args(&self, args: ReturnFieldArgs<'_>) -> Result<FieldRef>
Source§fn aliases(&self) -> &[String]
fn aliases(&self) -> &[String]
Returns any aliases (alternate names) for this function. Read more
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 invoke_with_args(&self, _args: ScalarFunctionArgs) -> Result<ColumnarValue>
fn invoke_with_args(&self, _args: ScalarFunctionArgs) -> Result<ColumnarValue>
Invoke the function returning the appropriate result. Read more
Source§fn documentation(&self) -> Option<&Documentation>
fn documentation(&self) -> Option<&Documentation>
Returns the documentation for this Scalar UDF. Read more
Source§fn display_name(&self, args: &[Expr]) -> Result<String, DataFusionError>
fn display_name(&self, args: &[Expr]) -> Result<String, DataFusionError>
Returns the user-defined display name of function, given the arguments Read more
Source§fn schema_name(&self, args: &[Expr]) -> Result<String, DataFusionError>
fn schema_name(&self, args: &[Expr]) -> Result<String, DataFusionError>
Returns the name of the column this expression would create Read more
Source§fn is_nullable(&self, _args: &[Expr], _schema: &dyn ExprSchema) -> bool
fn is_nullable(&self, _args: &[Expr], _schema: &dyn ExprSchema) -> bool
👎Deprecated since 45.0.0: Use
return_field_from_args
instead. if you use is_nullable
that returns non-nullable with return_type
, you would need to switch to return_field_from_args
, you might have errorSource§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. Read moreSource§fn evaluate_bounds(
&self,
_input: &[&Interval],
) -> Result<Interval, DataFusionError>
fn evaluate_bounds( &self, _input: &[&Interval], ) -> Result<Interval, DataFusionError>
Source§fn propagate_constraints(
&self,
_interval: &Interval,
_inputs: &[&Interval],
) -> Result<Option<Vec<Interval>>, DataFusionError>
fn propagate_constraints( &self, _interval: &Interval, _inputs: &[&Interval], ) -> Result<Option<Vec<Interval>>, DataFusionError>
Source§fn output_ordering(
&self,
inputs: &[ExprProperties],
) -> Result<SortProperties, DataFusionError>
fn output_ordering( &self, inputs: &[ExprProperties], ) -> Result<SortProperties, DataFusionError>
Calculates the
SortProperties
of this function based on its children’s properties.Source§fn preserves_lex_ordering(
&self,
_inputs: &[ExprProperties],
) -> Result<bool, DataFusionError>
fn preserves_lex_ordering( &self, _inputs: &[ExprProperties], ) -> Result<bool, DataFusionError>
Returns true if the function preserves lexicographical ordering based on
the input ordering. Read more
Source§fn coerce_types(
&self,
_arg_types: &[DataType],
) -> Result<Vec<DataType>, DataFusionError>
fn coerce_types( &self, _arg_types: &[DataType], ) -> Result<Vec<DataType>, DataFusionError>
Coerce arguments of a function call to types that the function can evaluate. Read more
Source§fn equals(&self, other: &dyn ScalarUDFImpl) -> bool
fn equals(&self, other: &dyn ScalarUDFImpl) -> bool
Return true if this scalar UDF is equal to the other. Read more
Source§fn hash_value(&self) -> u64
fn hash_value(&self) -> u64
Returns a hash value for this scalar UDF. Read more
Auto Trait Implementations§
impl Freeze for ClickHouseEval
impl !RefUnwindSafe for ClickHouseEval
impl Send for ClickHouseEval
impl Sync for ClickHouseEval
impl Unpin for ClickHouseEval
impl !UnwindSafe for ClickHouseEval
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> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
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