Trait tiberius::FromSql

source · [−]

pub trait FromSql<'a> where
    Self: Sized + 'a, {
    fn from_sql(value: &'a ColumnData<'static>) -> Result<Option<Self>>;
}

Expand description

A conversion trait from a TDS type by-reference.

A FromSql implementation for a Rust type is needed for using it as a return parameter from Row#get or Row#try_get methods. The following Rust types are already implemented to match the given server types:

Rust type	Server type
`u8`	`tinyint`
`i16`	`smallint`
`i32`	`int`
`i64`	`bigint`
`f32`	`float(24)`
`f64`	`float(53)`
`bool`	`bit`
`String`/`&str`	`nvarchar`/`varchar`/`nchar`/`char`/`ntext`/`text`
`Vec<u8>`/`&[u8]`	`binary`/`varbinary`/`image`
`Uuid`	`uniqueidentifier`
`Numeric`	`numeric`/`decimal`
`Decimal` (with feature flag `rust_decimal`)	`numeric`/`decimal`
`XmlData`	`xml`
`NaiveDateTime` (with feature flag `chrono`)	`datetime`/`datetime2`/`smalldatetime`
`NaiveDate` (with feature flag `chrono`)	`date`
`NaiveTime` (with feature flag `chrono`)	`time`
`DateTime` (with feature flag `chrono`)	`datetimeoffset`

See the time module for more information about the date and time structs.

Required Methods

fn from_sql(value: &'a ColumnData<'static>) -> Result<Option<Self>>

Returns the value, None being a null value, copying the value.

Implementations on Foreign Types

impl<'a> FromSql<'a> for bool

fn from_sql(data: &'a ColumnData<'static>) -> Result<Option<Self>>

impl<'a> FromSql<'a> for u8

fn from_sql(data: &'a ColumnData<'static>) -> Result<Option<Self>>

impl<'a> FromSql<'a> for i16

fn from_sql(data: &'a ColumnData<'static>) -> Result<Option<Self>>

impl<'a> FromSql<'a> for i32

fn from_sql(data: &'a ColumnData<'static>) -> Result<Option<Self>>

impl<'a> FromSql<'a> for i64

fn from_sql(data: &'a ColumnData<'static>) -> Result<Option<Self>>

impl<'a> FromSql<'a> for f32

fn from_sql(data: &'a ColumnData<'static>) -> Result<Option<Self>>

impl<'a> FromSql<'a> for f64

fn from_sql(data: &'a ColumnData<'static>) -> Result<Option<Self>>

impl<'a> FromSql<'a> for &'a str

fn from_sql(value: &'a ColumnData<'static>) -> Result<Option<Self>>

impl<'a> FromSql<'a> for &'a [u8 ]

fn from_sql(value: &'a ColumnData<'static>) -> Result<Option<Self>>

Implementors

impl<'a> FromSql<'a> for &'a XmlData

impl<'a> FromSql<'a> for BigDecimal

impl<'a> FromSql<'a> for Decimal

impl<'a> FromSql<'a> for Numeric

impl<'a> FromSql<'a> for Uuid

impl<'a> FromSql<'a> for DateTime<FixedOffset>

Available on crate feature chrono only.

impl<'a> FromSql<'a> for DateTime<Utc>

Available on crate feature chrono only.

impl<'a> FromSql<'a> for NaiveDate

Available on crate feature chrono only.

impl<'a> FromSql<'a> for NaiveDateTime

Available on crate feature chrono only.

impl<'a> FromSql<'a> for NaiveTime

Available on crate feature chrono only.

impl<'a> FromSql<'a> for Date

Available on crate feature time only.

impl<'a> FromSql<'a> for OffsetDateTime

Available on crate feature time only.

impl<'a> FromSql<'a> for PrimitiveDateTime

Available on crate feature time only.

impl<'a> FromSql<'a> for Time

Available on crate feature time only.