Enum PostgresUpdateValue 

pub enum PostgresUpdateValue<'a, V: SQLParam, T, Target: DataType = Any, TargetNull: Nullability = Null> {
    Skip,
    Null,
    Value(ValueWrapper<'a, V, (T, Target, TargetNull)>),
}

Represents a value for UPDATE operations that can be skipped, null, or a SQL expression.

Variants

Skip

Don’t include this column in the SET clause

Null

Explicitly set column = NULL

Value(ValueWrapper<'a, V, (T, Target, TargetNull)>)

Set column to a SQL expression (value, placeholder, etc.)

Implementations

impl<V: SQLParam, T, Target: DataType, TargetNull: Nullability> PostgresUpdateValue<'_, V, T, Target, TargetNull>

pub const fn is_skip(&self) -> bool

Returns true if this is Skip

Trait Implementations

impl<'a, V: Clone + SQLParam, T: Clone, Target: Clone + DataType, TargetNull: Clone + Nullability> Clone for PostgresUpdateValue<'a, V, T, Target, TargetNull>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a, V: Debug + SQLParam, T: Debug, Target: Debug + DataType, TargetNull: Debug + Nullability> Debug for PostgresUpdateValue<'a, V, T, Target, TargetNull>

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

Formats the value using the given formatter.

impl<'a, V: SQLParam, T, Target: DataType, TargetNull: Nullability> Default for PostgresUpdateValue<'a, V, T, Target, TargetNull>

fn default() -> Self

Returns the “default value” for a type.

impl<'a, Target, TargetNull> From<&str> for PostgresUpdateValue<'a, PostgresValue<'a>, String, Target, TargetNull>

where Target: DataType, TargetNull: Nullability,

fn from(value: &str) -> Self

Converts to this type from the input type.

impl<'a, T, Target, TargetNull, L, R, Op, Actual, ActualNull> From<ColumnBinOp<L, R, Op, PostgresDialect, Actual, ActualNull>> for PostgresUpdateValue<'a, PostgresValue<'a>, T, Target, TargetNull>

where Target: DataType + Assignable<Actual>, TargetNull: Nullability + AcceptsNullability<ActualNull>, Actual: DataType, ActualNull: Nullability, ColumnBinOp<L, R, Op, PostgresDialect, Actual, ActualNull>: ToSQL<'a, PostgresValue<'a>>,

fn from( value: ColumnBinOp<L, R, Op, PostgresDialect, Actual, ActualNull>, ) -> Self

Converts to this type from the input type.

impl<'a, T, Target, TargetNull, E, Actual, ActualNull> From<ColumnNeg<E, PostgresDialect, Actual, ActualNull>> for PostgresUpdateValue<'a, PostgresValue<'a>, T, Target, TargetNull>

where Target: DataType + Assignable<Actual>, TargetNull: Nullability + AcceptsNullability<ActualNull>, Actual: DataType, ActualNull: Nullability, ColumnNeg<E, PostgresDialect, Actual, ActualNull>: ToSQL<'a, PostgresValue<'a>>,

fn from(value: ColumnNeg<E, PostgresDialect, Actual, ActualNull>) -> Self

Converts to this type from the input type.

impl<'a, C, T, Target, TargetNull, Actual, ActualNull> From<Excluded<C>> for PostgresUpdateValue<'a, PostgresValue<'a>, T, Target, TargetNull>

where C: SQLColumnInfo + Expr<'a, PostgresValue<'a>, SQLType = Actual, Nullable = ActualNull>, Target: DataType + Assignable<Actual>, TargetNull: Nullability + AcceptsNullability<ActualNull>, Actual: DataType, ActualNull: Nullability,

fn from(excluded: Excluded<C>) -> Self

Converts to this type from the input type.

impl<'a, T, Target, TargetNull> From<Placeholder> for PostgresUpdateValue<'a, PostgresValue<'a>, T, Target, TargetNull>

where Target: DataType, TargetNull: Nullability,

fn from(placeholder: Placeholder) -> Self

Converts to this type from the input type.

impl<'a, T, Target, TargetNull, Actual, ActualNull> From<SQLExpr<'a, PostgresValue<'a>, Actual, ActualNull>> for PostgresUpdateValue<'a, PostgresValue<'a>, T, Target, TargetNull>

where Target: DataType + Assignable<Actual>, TargetNull: Nullability + AcceptsNullability<ActualNull>, Actual: DataType, ActualNull: Nullability,

fn from( value: SQLExpr<'a, PostgresValue<'a>, Actual, ActualNull, Scalar>, ) -> Self

Converts to this type from the input type.

impl<'a, T, Target, TargetNull> From<T> for PostgresUpdateValue<'a, PostgresValue<'a>, T, Target, TargetNull>

where T: TryInto<PostgresValue<'a>>, Target: DataType, TargetNull: Nullability,

Converts any value that converts to a PostgresValue.

Panics

Panics when the value fails to convert (a JSON payload that fails to serialize, for example), rather than storing NULL in its place.

fn from(value: T) -> Self

Converts to this type from the input type.

impl<'a, M, N, T, Target, TargetNull> From<TypedPlaceholder<M, N>> for PostgresUpdateValue<'a, PostgresValue<'a>, T, Target, TargetNull>

where M: DataType, N: Nullability, Target: DataType + Assignable<M>, TargetNull: Nullability + AcceptsNullability<N>,

fn from(typed: TypedPlaceholder<M, N>) -> Self

Converts to this type from the input type.