Struct Conflict 

pub struct Conflict {
    pub expression: Option<Expr>,
}

The slot an INSERT keeps for its conflict handling.

It holds an erased expression rather than a ConflictClause because the three dialects do not spell this the same way: PostgreSQL and SQLite have ON CONFLICT, MySQL has ON DUPLICATE KEY UPDATE and SQLite also has INSERT OR REPLACE. Each dialect puts its own expression here — usually a ConflictClause, reaching core through Expr::Custom.

Fields

expression: Option<Expr>

The whole conflict clause, whatever this dialect’s shape for one is.

Implementations

impl Conflict

pub fn set_conflict(&mut self, conflict: impl IntoExpr)

Set the conflict clause.

pub fn is_empty(&self) -> bool

Whether the clause is absent.

Trait Implementations

impl Clone for Conflict

fn clone(&self) -> Conflict

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Conflict

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

Formats the value using the given formatter.

impl Default for Conflict

fn default() -> Conflict

Returns the “default value” for a type.

impl Expression for Conflict

fn write_sql(&self, w: &mut SqlWriter<'_>)

Append this fragment to w.

impl HasConflict for Conflict

fn conflict_mut(&mut self) -> &mut Conflict

The conflict slot to modify.