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Row

Struct Row 

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

A row of data from a query result.

Pre-computes column byte ranges for O(1) random access. Best for accessing multiple columns or accessing columns in random order.

§Example

for row in client.query("SELECT id, name, active FROM users")? {
    let id = row.get_i32(0);
    let name = row.get_string(1);
    let active = row.get_bool(2);
    println!("{:?}: {:?} (active={:?})", id, name, active);
}

Implementations§

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impl Row

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pub fn column_count(&self) -> usize

Returns the number of columns.

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pub fn is_empty(&self) -> bool

Returns true if the row has no columns.

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

Returns the column metadata.

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

Returns raw bytes for a column, or None if NULL.

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pub fn is_null(&self, idx: usize) -> bool

Returns true if the column is NULL.

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pub fn get_i16(&self, idx: usize) -> Option<i16>

Gets an i16 value. Returns None if NULL or invalid format.

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pub fn get_i32(&self, idx: usize) -> Option<i32>

Gets an i32 value. Returns None if NULL or invalid format.

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pub fn get_i64(&self, idx: usize) -> Option<i64>

Gets an i64 value. Returns None if NULL or invalid format.

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pub fn get_f32(&self, idx: usize) -> Option<f32>

Gets an f32 value. Returns None if NULL or invalid format.

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pub fn get_f64(&self, idx: usize) -> Option<f64>

Gets an f64 value. Returns None if NULL or invalid format.

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pub fn get_bool(&self, idx: usize) -> Option<bool>

Gets a bool value. Returns None if NULL or invalid format.

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pub fn get_string(&self, idx: usize) -> Option<String>

Gets a String value. Returns None if NULL or invalid UTF-8.

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pub fn get_bytes_owned(&self, idx: usize) -> Option<Vec<u8>>

Gets raw bytes as owned Vec, decoding BYTEA hex format if needed.

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pub fn get<T: FromHyperBinary>(&self, idx: usize) -> Option<T>

Gets a typed value using the FromHyperBinary trait.

Returns None if the column is NULL or conversion fails.

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

Gets a typed value by column name.

Returns None if the column is NULL, not found, or conversion fails.

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pub fn column_index(&self, name: &str) -> Result<usize>

Returns the index of a column by name.

§Errors

Returns ErrorKind::Query with the column name in the message if no column matches.

Trait Implementations§

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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

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 UnsafeUnpin for Row

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impl UnwindSafe for Row

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> 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> IntoRequest<T> for T

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fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
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impl<L> LayerExt<L> for L

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fn named_layer<S>(&self, service: S) -> Layered<<L as Layer<S>>::Service, S>
where L: Layer<S>,

Applies the layer to a service and wraps it in Layered.
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impl<T> Same for T

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type Output = T

Should always be Self
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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