Struct ColumnFamily

pub struct ColumnFamily {
    pub gc_rule: Option<GcRule>,
    pub value_type: Option<Type>,
}

A set of columns within a table which share a common configuration.

Fields

gc_rule: Option<GcRule>

Garbage collection rule specified as a protobuf. Must serialize to at most 500 bytes.

NOTE: Garbage collection executes opportunistically in the background, and so it’s possible for reads to return a cell even if it matches the active GC expression for its family.

value_type: Option<Type>

The type of data stored in each of this family’s cell values, including its full encoding. If omitted, the family only serves raw untyped bytes.

For now, only the Aggregate type is supported.

Aggregate can only be set at family creation and is immutable afterwards.

If value_type is Aggregate, written data must be compatible with:

• value_type.input_type for AddInput mutations

Trait Implementations

impl Clone for ColumnFamily

fn clone(&self) -> ColumnFamily

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnFamily

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

Formats the value using the given formatter.

impl Default for ColumnFamily

fn default() -> Self

Returns the “default value” for a type.

impl Message for ColumnFamily

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for ColumnFamily

fn eq(&self, other: &ColumnFamily) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ColumnFamily