Struct ResolvedFkRef 

pub struct ResolvedFkRef {
    pub child_table: Arc<BTreeTable>,
    pub fk: Arc<ForeignKey>,
    pub parent_cols: Box<[String]>,
    pub child_pos: BoxedSlice<usize>,
    pub parent_pos: BoxedSlice<usize>,
    pub parent_uses_rowid: bool,
    pub parent_unique_index: Option<Arc<Index>>,
}

A single resolved foreign key where parent_table == target.

Child column names live in fk.child_columns — not duplicated here.

Fields

child_table: Arc<BTreeTable>

Child table that owns the FK.

fk: Arc<ForeignKey>

The FK as declared on the child table.

parent_cols: Box<[String]>

Resolved parent columns: either fk.parent_columns or, when that is empty, the parent table’s PRIMARY KEY columns. Always non-empty.

child_pos: BoxedSlice<usize>

Column positions in the child/parent tables (pos_in_table)

parent_pos: BoxedSlice<usize>

parent_uses_rowid: bool

If the parent key is rowid or a rowid-alias (single-column only)

parent_unique_index: Option<Arc<Index>>

For non-rowid parents: the UNIQUE index that enforces the parent key. (None when parent_uses_rowid == true.)

Implementations

impl ResolvedFkRef

pub fn parent_key_may_change( &self, updated_parent_positions: &ColumnMask, parent_tbl: &BTreeTable, ) -> Result<bool>

Returns if any referenced parent column can change when these column positions are updated.

pub fn child_key_changed( &self, updated_child_positions: &ColumnMask, child_tbl: &BTreeTable, ) -> bool

Returns if any child column of this FK is in updated_child_positions

Trait Implementations

impl Clone for ResolvedFkRef

fn clone(&self) -> ResolvedFkRef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResolvedFkRef

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

Formats the value using the given formatter.