Row

Struct Row 

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pub struct Row { /* private fields */ }
Expand description

查询结果行

包含列名到值的映射

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impl Row

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pub fn new() -> Self

创建新行

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pub fn push(&mut self, name: impl Into<String>, value: SqlValue)

添加列值

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pub fn len(&self) -> usize

获取列数

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pub fn is_empty(&self) -> bool

判断是否为空

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pub fn columns(&self) -> &[String]

获取列名列表

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pub fn get(&self, index: usize) -> Option<&SqlValue>

按索引获取值

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pub fn get_by_name(&self, name: &str) -> Option<&SqlValue>

按列名获取值

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pub fn get_i64(&self, name: &str) -> Option<i64>

尝试获取 i64 值

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pub fn get_f64(&self, name: &str) -> Option<f64>

尝试获取 f64 值

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pub fn get_str(&self, name: &str) -> Option<&str>

尝试获取字符串值

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pub fn get_string(&self, name: &str) -> Option<String>

尝试获取字符串值(返回 String)

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pub fn get_bool(&self, name: &str) -> Option<bool>

尝试获取 bool 值

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pub fn get_bytes(&self, name: &str) -> Option<&[u8]>

尝试获取 bytes 值

Trait Implementations§

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impl Clone for Row

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fn clone(&self) -> Row

Returns a duplicate 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 Row

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

Formats the value using the given formatter. Read more
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impl Default for Row

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fn default() -> Row

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl Freeze for Row

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impl RefUnwindSafe for Row

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impl Send for Row

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impl Sync for Row

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impl Unpin for Row

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impl UnwindSafe for Row

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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> 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, 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> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more