Struct IndexColumn 

pub struct IndexColumn {
    pub column: ColumnId,
    pub op: IndexOp,
    pub scope: IndexScope,
}

A single column entry within an Index.

Specifies which column is indexed, the comparison operation, and the scope (partition vs. local).

Examples

use toasty_core::schema::db::{IndexColumn, IndexOp, IndexScope, ColumnId, TableId};

let ic = IndexColumn {
    column: ColumnId { table: TableId(0), index: 0 },
    op: IndexOp::Eq,
    scope: IndexScope::Local,
};

assert!(ic.scope.is_local());

Fields

column: ColumnId

The column being indexed

op: IndexOp

The comparison operation used to index the column

scope: IndexScope

Scope of the index

Implementations

impl IndexColumn

pub fn table_column<'a>(&self, schema: &'a Schema) -> &'a Column

Returns the Column referenced by 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<'de> Deserialize<'de> for IndexColumn

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for IndexColumn

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

where __S: Serializer,

Serialize this value into the given Serde serializer.