Struct IndexKeyColumn 

pub struct IndexKeyColumn {
    pub column: Option<u16>,
    pub expr_sql: Option<Vec<u8>>,
    pub collation: Vec<u8>,
    pub descending: bool,
}

One key column of an index being created.

Fields

column: Option<u16>

The table column, when the key is a bare column.

None for a key that is an expression. It was a bare u16 while CREATE INDEX ix ON t(lower(a)) was refused in the binder; the field is an Option now so that a reader which needs a column - a module-backed index, say - has to say what it does when there is not one, rather than reading a position that was invented to fill the slot.

expr_sql: Option<Vec<u8>>

The key expression, as written, when the key is one.

collation: Vec<u8>

The folded collation name.

descending: bool

Whether the key is stored descending.

Trait Implementations

impl Clone for IndexKeyColumn

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IndexKeyColumn

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

Formats the value using the given formatter.

impl Eq for IndexKeyColumn

impl PartialEq for IndexKeyColumn

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for IndexKeyColumn