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ValueRef

cast::sqlx

Trait ValueRef 

Source 
pub trait ValueRef<'r>: Sized {
    type Database: Database;

    // Required methods
    fn to_owned(&self) -> <Self::Database as Database>::Value;
    fn type_info(&self) -> Cow<'_, <Self::Database as Database>::TypeInfo>;
    fn is_null(&self) -> bool;
}
Expand description

A reference to a single value from the database.

Required Associated Types§

Source

type Database: Database

Required Methods§

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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.

Source

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

Get the type information for this value.

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fn is_null(&self) -> bool

Returns true if the SQL value is NULL.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§