Struct IndexColumnDef 

pub struct IndexColumnDef {
    pub value: &'static str,
    pub is_expression: bool,
    pub asc: bool,
    pub nulls_first: bool,
    pub opclass: Option<OpclassDef>,
}

Const-friendly index column definition

Fields

value: &'static str

Column name or expression

is_expression: bool

Whether this is an expression (vs column name)

asc: bool

Ascending order (true) or descending (false)

nulls_first: bool

NULLS FIRST ordering

opclass: Option<OpclassDef>

Operator class (optional)

Implementations

impl IndexColumnDef

pub const fn new(value: &'static str) -> Self

Create a new index column definition

pub const fn expression(expr: &'static str) -> Self

Create an expression-based index column

pub const fn desc(self) -> Self

Set descending order

pub const fn nulls_first(self) -> Self

Set NULLS FIRST

pub const fn opclass(self, opclass: OpclassDef) -> Self

Set operator class

pub const fn opclass_name(self, name: &'static str) -> Self

Set operator class by name (convenience method)

impl IndexColumnDef

pub fn to_sql(&self) -> String

Generate the column reference for an index

Trait Implementations

impl Clone for IndexColumnDef

fn clone(&self) -> IndexColumnDef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IndexColumnDef

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

Formats the value using the given formatter.

impl From<IndexColumnDef> for IndexColumn

fn from(def: IndexColumnDef) -> Self

Converts to this type from the input type.

impl Hash for IndexColumnDef

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 IndexColumnDef

fn eq(&self, other: &IndexColumnDef) -> 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 Copy for IndexColumnDef

impl Eq for IndexColumnDef

impl StructuralPartialEq for IndexColumnDef