Enum rusqlite::types::ValueRef

pub enum ValueRef<'a> {
    Null,
    Integer(i64),
    Real(f64),
    Text(&'a [u8]),
    Blob(&'a [u8]),
}

A non-owning dynamic type value. Typically the memory backing this value is owned by SQLite.

See Value for an owning dynamic type value.

Variants

Null

The value is a NULL value.

Integer(i64)

The value is a signed integer.

Real(f64)

The value is a floating point number.

Text(&'a [u8])

The value is a text string.

Blob(&'a [u8])

The value is a blob of data

Methods

impl<'_> ValueRef<'_>

pub fn data_type(&self) -> Type

impl<'a> ValueRef<'a>

pub fn as_i64(&self) -> FromSqlResult<i64>

If self is case Integer, returns the integral value. Otherwise, returns Err(Error::InvalidColumnType).

pub fn as_f64(&self) -> FromSqlResult<f64>

If self is case Real, returns the floating point value. Otherwise, returns Err(Error::InvalidColumnType).

pub fn as_str(&self) -> FromSqlResult<&'a str>

If self is case Text, returns the string value. Otherwise, returns Err(Error::InvalidColumnType).

pub fn as_blob(&self) -> FromSqlResult<&'a [u8]>

If self is case Blob, returns the byte slice. Otherwise, returns Err(Error::InvalidColumnType).

Trait Implementations

impl<'a> Clone for ValueRef<'a>

fn clone(&self) -> ValueRef<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'_> From<ValueRef<'_>> for Value

fn from(borrowed: ValueRef) -> Value

Performs the conversion.

impl<'a> From<&'a str> for ValueRef<'a>

fn from(s: &str) -> ValueRef

Performs the conversion.

impl<'a> From<&'a [u8]> for ValueRef<'a>

fn from(s: &[u8]) -> ValueRef

Performs the conversion.

impl<'a> From<&'a Value> for ValueRef<'a>

fn from(value: &'a Value) -> ValueRef<'a>

Performs the conversion.

impl<'a> PartialEq<ValueRef<'a>> for ValueRef<'a>

fn eq(&self, other: &ValueRef<'a>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &ValueRef<'a>) -> bool

This method tests for !=.

impl<'a> Copy for ValueRef<'a>

impl<'a> Debug for ValueRef<'a>

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

Formats the value using the given formatter.