Struct TypedNull 

pub struct TypedNull { /* private fields */ }

A typed NULL parameter, created with null.

Unlike Option::<T>::None, which produces an untyped NULL declared as nvarchar(1), this carries its SQL type. That matters for Always Encrypted columns, whose strict typing rejects an untyped NULL bound to, for example, an int or varbinary column.

Trait Implementations

impl Clone for TypedNull

fn clone(&self) -> TypedNull

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TypedNull

impl Debug for TypedNull

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

Formats the value using the given formatter.

impl ToSql for TypedNull

fn to_sql(&self) -> Result<SqlValue, TypeError>

Convert this value to a SQL value.

fn sql_type(&self) -> &'static str

Get the SQL type name for this value.

fn encrypted_param_type(&self) -> Option<EncryptedParamType>

The explicit SQL type a parameter must be declared and encrypted as, when the value alone cannot convey it.