Struct pgrx::pg_sys::NullableDatum

source · 
#[repr(C)]
pub struct NullableDatum {
    pub value: Datum,
    pub isnull: bool,
}
Expand description

This struct consists of a Datum and a bool, matching Postgres’s definition as of Postgres 12. This isn’t efficient in terms of storage size, due to padding, but sometimes it’s more cache-friendly, so sometimes it is the preferred type.

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§value: Datum§isnull: bool

Trait Implementations§

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impl Clone for NullableDatum

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fn clone(&self) -> NullableDatum

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for NullableDatum

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

Formats the value using the given formatter. Read more
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impl From<NullableDatum> for Option<Datum>

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fn from(nd: NullableDatum) -> Option<Datum>

Converts to this type from the input type.
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impl TryFrom<NullableDatum> for Datum

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type Error = ()

The type returned in the event of a conversion error.
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fn try_from(nd: NullableDatum) -> Result<Datum, ()>

Performs the conversion.
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impl Copy for NullableDatum

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pipe for T
where T: ?Sized,

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R
where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more
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fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R
where R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more
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fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R
where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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fn pipe_borrow_mut<'a, B, R>( &'a mut self, func: impl FnOnce(&'a mut B) -> R ) -> R
where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R
where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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fn pipe_deref_mut<'a, T, R>( &'a mut self, func: impl FnOnce(&'a mut T) -> R ) -> R
where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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impl<T> Tap for T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithTypeIds for T
where T: 'static + ?Sized,

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const ITEM_ID: Lazy<TypeId> = const ITEM_ID: Lazy<TypeId> = Lazy::new(|| TypeId::of::<T>());

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const OPTION_ID: Lazy<Option<TypeId>> = const OPTION_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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const VEC_ID: Lazy<Option<TypeId>> = const VEC_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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const VEC_OPTION_ID: Lazy<Option<TypeId>> = const VEC_OPTION_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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const OPTION_VEC_ID: Lazy<Option<TypeId>> = const OPTION_VEC_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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const OPTION_VEC_OPTION_ID: Lazy<Option<TypeId>> = const OPTION_VEC_OPTION_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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const ARRAY_ID: Lazy<Option<TypeId>> = const ARRAY_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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const OPTION_ARRAY_ID: Lazy<Option<TypeId>> = const OPTION_ARRAY_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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const VARIADICARRAY_ID: Lazy<Option<TypeId>> = const VARIADICARRAY_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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const OPTION_VARIADICARRAY_ID: Lazy<Option<TypeId>> = const OPTION_VARIADICARRAY_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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const VARLENA_ID: Lazy<Option<TypeId>> = const VARLENA_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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const OPTION_VARLENA_ID: Lazy<Option<TypeId>> = const OPTION_VARLENA_ID: Lazy<Option<TypeId>> = Lazy::new(|| None);

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fn register_with_refs(map: &mut HashSet<RustSqlMapping>, single_sql: String)
where Self: 'static,

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fn register_sized_with_refs( _map: &mut HashSet<RustSqlMapping>, _single_sql: String )
where Self: 'static,

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fn register_sized(_map: &mut HashSet<RustSqlMapping>, _single_sql: String)
where Self: 'static,

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fn register_varlena_with_refs( _map: &mut HashSet<RustSqlMapping>, _single_sql: String )
where Self: 'static,

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fn register_varlena(_map: &mut HashSet<RustSqlMapping>, _single_sql: String)
where Self: 'static,

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fn register_array_with_refs( _map: &mut HashSet<RustSqlMapping>, _single_sql: String )
where Self: 'static,

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fn register_array(_map: &mut HashSet<RustSqlMapping>, _single_sql: String)
where Self: 'static,

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fn register(set: &mut HashSet<RustSqlMapping>, single_sql: String)
where Self: 'static,