Enum OColumnName

pub enum OColumnName {
    String = 1,
    Unsigned = 2,
    Signed = 3,
    Float = 4,
    Double = 5,
    Points = 6,
    Points3D = 7,
    Indices = 8,
    Shapes = 9,
    BBox = 10,
}

Column Types take up 3 bits. ColumnNames define various common data structures to be stored in a column fashion

Variants

String = 1

stores string values

Unsigned = 2

Note: IDs are stored in unsigned Number types are sorted prior to storing

Signed = 3

Number types are sorted prior to storing

Float = 4

Floating precision helps ensure only 32 bit cost Number types are sorted prior to storing

Double = 5

worst case, no compression Number types are sorted prior to storing

Points = 6

points is an array of { x: number, y: number } points also stores lines. if a line is stored, note that it has an acompanying offset and potentially mValues Polygons are stored as a collection of lines. The points feature type that has more than one will be stored here as well.

Points3D = 7

points3D is an array of { x: number, y: number, z: number } points3D also stores lines. if a line is stored, note that it has an acompanying offset and potentially mValues Polygons are stored as a collection of lines. The points 3D feature type that has more than one will be stored here as well.

Indices = 8

store M-Value, Shape, and Value encodings store geometry shapes. store geometry indices.

Shapes = 9

Shapes describe how to rebuild objects

BBox = 10

BBox - specially compressed to reduce byte cost. each value is only 3 bytes worst case BBox3D - specially compressed to reduce byte cost. each value is only 3 bytes worst case. The z values are stored as floats and cost 4 bytes.

Trait Implementations

impl Clone for OColumnName

fn clone(&self) -> OColumnName

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OColumnName

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

Formats the value using the given formatter.

impl Default for OColumnName

fn default() -> OColumnName

Returns the “default value” for a type.

impl From<OColumnName> for u64

fn from(col: OColumnName) -> Self

Converts to this type from the input type.

impl From<u64> for OColumnName

fn from(value: u64) -> Self

Converts to this type from the input type.

impl Ord for OColumnName

fn cmp(&self, other: &OColumnName) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for OColumnName

fn eq(&self, other: &OColumnName) -> 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 PartialOrd for OColumnName

fn partial_cmp(&self, other: &OColumnName) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for OColumnName

impl StructuralPartialEq for OColumnName