[−][src]Enum dbcrossbarlib::IfExists
What to do if the destination already exists.
Variants
Error
If the destination exists, return an error.
Append
If the destination exists, try to append the new data.
Overwrite
If the destination exists, overrwrite the existing data.
Upsert(Vec<String>)
If the destination exists, either update or insert using the specified
columns as the key. The list of keys must be non-empty, but we currently
only enforce that when parsing in FromStr
.
Trait Implementations
impl Clone for IfExists
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impl Default for IfExists
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impl Eq for IfExists
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impl PartialEq<IfExists> for IfExists
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impl Debug for IfExists
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impl Display for IfExists
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impl FromStr for IfExists
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Auto Trait Implementations
impl Sync for IfExists
impl Unpin for IfExists
impl Send for IfExists
impl UnwindSafe for IfExists
impl RefUnwindSafe for IfExists
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> IntoSql for T
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fn into_sql<T>(self) -> Self::Expression where
Self: AsExpression<T>,
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Self: AsExpression<T>,
fn as_sql<'a, T>(&'a self) -> <&'a Self as AsExpression<T>>::Expression where
&'a Self: AsExpression<T>,
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&'a Self: AsExpression<T>,
impl<T> Erased for T
impl<T> SendSyncUnwindSafe for T where
T: Send + Sync + UnwindSafe + ?Sized,
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T: Send + Sync + UnwindSafe + ?Sized,
impl<Q, K> Equivalent<K> for Q where
K: Borrow<Q> + ?Sized,
Q: Eq + ?Sized,
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K: Borrow<Q> + ?Sized,
Q: Eq + ?Sized,
fn equivalent(&self, key: &K) -> bool
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impl<'a, T> TryFrom<&'a str> for T where
T: FromStr,
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T: FromStr,
type Err = <T as FromStr>::Err
fn try_from(string: &'a str) -> Result<T, <T as TryFrom<&'a str>>::Err>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
impl<T> Same<T> for T
type Output = T
Should always be Self
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,