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>,
}

Available on crate feature std only.

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>>) -> IndexColumn

Available on crate features alloc or std only.

Create a new index column

pub fn expression(expr: impl Into<Cow<'static, str>>) -> IndexColumn

Available on crate features alloc or std only.

Create an expression-based index column

pub const fn desc(self) -> IndexColumn

Available on crate features alloc or std only.

Set descending order

pub const fn nulls_first(self) -> IndexColumn

Available on crate features alloc or std only.

Set NULLS FIRST

pub fn with_opclass(self, opclass: Opclass) -> IndexColumn

Available on crate features alloc or std only.

Set operator class

impl IndexColumn

pub fn to_sql(&self) -> String

Available on crate features alloc or std only.

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<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for IndexColumn

fn deserialize<__D>( __deserializer: __D, ) -> Result<IndexColumn, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for IndexColumn

impl From<IndexColumnDef> for IndexColumn

fn from(def: IndexColumnDef) -> IndexColumn

Converts to this type from the input type.

impl PartialEq for IndexColumn

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for IndexColumn

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for IndexColumn