Enum BlockLayout 

#[repr(u8)]
pub enum BlockLayout {
    Int64 = 1,
    Float64 = 2,
    PackedBool = 3,
    VarLen = 4,
    FixedWidth = 5,
    DictIds = 6,
}

Physical layout of every block of one column.

The writer records the layout it encodes. The reader decodes by it, so a column’s codec never has to stand in for its layout.

Variants

Int64 = 1

i64 values through the integer codec pipeline.

Float64 = 2

f64 values through the float codec pipeline.

PackedBool = 3

One bit per row: row i is bit i % 8 of byte i / 8.

VarLen = 4

A compressed i64 offset table, then the variable-length bytes.

FixedWidth = 5

Cells of one width: 16-byte decimals and identifiers, or packed f32 vectors. Every row holds a full cell, a null row included.

DictIds = 6

i64 dictionary IDs. The strings are in ColumnMeta::dictionary.

Trait Implementations

impl Clone for BlockLayout

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BlockLayout

impl Debug for BlockLayout

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for BlockLayout

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for BlockLayout

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for BlockLayout

fn read<R: Read<'__msgpack_de>>(reader: &mut R) -> Result<Self, Error>

where Self: Sized,

Reads the MessagePack representation of this value from the provided reader.

impl Hash for BlockLayout

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for BlockLayout

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for BlockLayout

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for BlockLayout

impl ToMessagePack for BlockLayout

fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Writes the MessagePack representation of this value into the provided writer.

fn write_slice<W>(values: &[Self], writer: &mut W) -> Result<(), Error>

where W: Write, Self: Sized,

Writes the MessagePack representation of a slice of values into the provided writer.

fn size_hint(&self) -> Option<TrustedSizeHint>

Returns a trusted upper bound for the number of bytes written by the next call to Self::write, or None when it cannot be determined cheaply.

fn max_size() -> Option<TrustedSizeHint>

where Self: Sized,

Returns a trusted upper bound valid for every value of this type.