Struct OnConflictClause 

pub struct OnConflictClause {
    pub target_columns: Vec<String>,
    pub index_where: Option<Expr>,
    pub constraint_name: Option<String>,
    pub mysql_lowered: bool,
    pub action: OnConflictAction,
}

v7.9.7 — INSERT upsert clause: ON CONFLICT (target) DO action.

Fields

target_columns: Vec<String>

Local columns that identify the conflict (must match a UNIQUE / PRIMARY KEY index on the target table). Empty list means the user wrote ON CONFLICT DO … without a target — the engine arbitrates on every unique constraint (round 240).

index_where: Option<Expr>

v7.39 (round 240) — the index predicate after the target list (ON CONFLICT (col) WHERE pred DO …). PG uses it to infer a PARTIAL unique index; SPG’s conflict arbiters are full indexes, which satisfy any predicate, so it is parsed and carried but not consulted (recorded residual: partial-unique-index arbiters).

constraint_name: Option<String>

v7.37.17 (17.6 siblings) — ON CONFLICT ON CONSTRAINT <name>: the pg_dump conflict-target form. The engine resolves the name to the constraint’s columns.

mysql_lowered: bool

v7.39 (round 240) — true when this clause was LOWERED from MySQL’s ON DUPLICATE KEY UPDATE / REPLACE INTO, whose bare-target DO UPDATE is legal (MySQL watches every unique key); PG’s own bare ON CONFLICT DO UPDATE is refused (42601).

action: OnConflictAction

The action on conflict.

Trait Implementations

impl Clone for OnConflictClause

fn clone(&self) -> OnConflictClause

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OnConflictClause

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

Formats the value using the given formatter.

impl Display for OnConflictClause

v7.30.1 (mailrs round-24) — render the ON CONFLICT clause the parser produced, so the AST→SQL round trip preserves upsert semantics (WAL replay depends on it).

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

Formats the value using the given formatter.

impl PartialEq for OnConflictClause

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OnConflictClause