Enum TriggerError 

pub enum TriggerError {
    UnparseableBody {
        function: String,
        detail: String,
    },
    UnsupportedConstruct {
        function: String,
        detail: String,
    },
    OldIsReadOnly {
        function: String,
        column: String,
    },
    NewReadOnlyInAfterTrigger {
        function: String,
        column: String,
    },
    UnknownColumn {
        function: String,
        column: String,
        table: String,
    },
    EvalFailed {
        function: String,
        cause: EvalError,
    },
    RaiseException {
        function: String,
        message: String,
    },
}

Result type the trigger executor exposes. Wraps EvalError at the eval-of-expressions layer and adds trigger-specific failure modes (OLD.col := …, unsupported PL/pgSQL feature, body that fails to re-parse, …).

Variants

UnparseableBody

Body source stored in the catalog can’t be re-parsed. Usually means the function was created against a newer PL/pgSQL surface than the running engine knows about.

Fields

function: String

detail: String

UnsupportedConstruct

Trigger function uses a v7.12.5+ language feature (DECLARE, IF, embedded SQL, RAISE, …). The error names the construct so the operator can plan around it until the feature lands.

Fields

function: String

detail: String

OldIsReadOnly

OLD.col := <expr> inside the body. PG itself rejects this; we surface a clear message rather than silently dropping the assignment.

Fields

function: String

column: String

NewReadOnlyInAfterTrigger

NEW.col := <expr> in an AFTER trigger — same rationale as OLD: PG enforces “NEW is read-only after the row has been written” and we mirror.

Fields

function: String

column: String

UnknownColumn

NEW.col := <expr> against a non-existent column. Usually a schema-drift bug.

Fields

function: String

column: String

table: String

EvalFailed

Sub-expression eval inside the trigger body failed. The wrapped EvalError explains the underlying cause (ColumnNotFound, TypeMismatch, …).

Fields

function: String

cause: EvalError

RaiseException

v7.12.6 — RAISE EXCEPTION '<message>' [, args]* in the trigger body. The interpreter formats the args into the message via PG-style % substitution and surfaces the resolved text up to the caller.

Fields

function: String

message: String

Trait Implementations

impl Clone for TriggerError

fn clone(&self) -> TriggerError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TriggerError

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

Formats the value using the given formatter.

impl Display for TriggerError

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

Formats the value using the given formatter.

impl PartialEq for TriggerError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for TriggerError