Trait sqlx_core::value::ValueRef

pub trait ValueRef<'r>: Sized {
    type Database: Database;
    fn to_owned(&self) -> <Self::Database as Database>::Value;
    fn type_info(&self) -> Cow<'_, <Self::Database as Database>::TypeInfo>;
    fn is_null(&self) -> bool;
}

A reference to a single value from the database.

Associated Types

type Database: Database

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Required methods

fn to_owned(&self) -> <Self::Database as Database>::Value

Creates an owned value from this value reference.

This is just a reference increment in PostgreSQL and MySQL and thus is O(1). In SQLite, this is a copy.

fn type_info(&self) -> Cow<'_, <Self::Database as Database>::TypeInfo>

Get the type information for this value.

fn is_null(&self) -> bool

Returns true if the SQL value is NULL.

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Implementors

impl ValueRef<'_> for MssqlValueRef<'_>

type Database = Mssql

fn to_owned(&self) -> MssqlValue

fn type_info(&self) -> Cow<'_, MssqlTypeInfo>

fn is_null(&self) -> bool

impl<'r> ValueRef<'r> for AnyValueRef<'r>

type Database = Any

fn to_owned(&self) -> AnyValue

fn type_info(&self) -> Cow<'_, AnyTypeInfo>

fn is_null(&self) -> bool

impl<'r> ValueRef<'r> for MySqlValueRef<'r>

type Database = MySql

fn to_owned(&self) -> MySqlValue

fn type_info(&self) -> Cow<'_, MySqlTypeInfo>

fn is_null(&self) -> bool

impl<'r> ValueRef<'r> for PgValueRef<'r>

type Database = Postgres

fn to_owned(&self) -> PgValue

fn type_info(&self) -> Cow<'_, PgTypeInfo>

fn is_null(&self) -> bool

impl<'r> ValueRef<'r> for SqliteValueRef<'r>

type Database = Sqlite

fn to_owned(&self) -> SqliteValue

fn type_info(&self) -> Cow<'_, SqliteTypeInfo>

fn is_null(&self) -> bool

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