Enum ColumnLayout 

pub enum ColumnLayout {
    Identity {
        column_count: usize,
    },
    Mapped {
        offsets: Vec<usize>,
        non_virtual_col_count: usize,
    },
}

Maps schema column indices to register offsets for DML operations.

Variants

Identity

Fields

column_count: usize

Mapped

Fields

offsets: Vec<usize>

non_virtual_col_count: usize

Implementations

impl ColumnLayout

pub fn from_table(table: &Table) -> Result<Self, TryReserveError>

pub fn from_btree(btree: &BTreeTable) -> Result<Self, TryReserveError>

pub fn from_columns(columns: &[Column]) -> Result<Self, TryReserveError>

pub fn to_reg_offset(&self, col_idx: usize) -> usize

Map a schema column index to its register offset.

pub fn to_register(&self, base: usize, schema_idx: usize) -> usize

Resolve schema column index to an absolute register.

pub fn num_non_virtual_cols(&self) -> usize

pub fn column_count(&self) -> usize

pub fn column_idx_for_offset(&self, offset: usize) -> Option<usize>

Trait Implementations

impl Clone for ColumnLayout

fn clone(&self) -> ColumnLayout

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnLayout

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

Formats the value using the given formatter.