Struct IndexColumn 

pub struct IndexColumn {
    pub value: Cow<'static, str>,
    pub is_expression: bool,
    pub asc: bool,
    pub nulls_first: bool,
    pub opclass: Option<Opclass>,
}

Runtime index column entity for serde serialization

Fields

value: Cow<'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<Opclass>

Operator class (optional)

Implementations

impl IndexColumn

pub fn new(value: impl Into<Cow<'static, str>>) -> Self

Create a new index column

pub fn expression(expr: impl Into<Cow<'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 fn with_opclass(self, opclass: Opclass) -> Self

Set operator class

impl IndexColumn

pub fn to_sql(&self) -> String

Generate SQL for this index column

Trait Implementations

impl Clone for IndexColumn

fn clone(&self) -> IndexColumn

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IndexColumn

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 PartialEq for IndexColumn

fn eq(&self, other: &IndexColumn) -> 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 Eq for IndexColumn

impl StructuralPartialEq for IndexColumn