Enum EvalError 

pub enum EvalError {
    QualifiedColumnNotFound {
        qualifier: String,
        column: String,
    },
    WrongArity {
        name: String,
        types: String,
    },
    ColumnNotFound {
        name: String,
    },
    UnknownQualifier {
        qualifier: String,
        column: String,
    },
    DivisionByZero,
    TypeMismatch {
        detail: String,
    },
    PlaceholderOutOfRange {
        n: u16,
        bound: u16,
    },
    StackDepthExceeded,
}

Variants

QualifiedColumnNotFound

v7.39.2 — a qualified reference whose QUALIFIER resolves but whose column does not. PostgreSQL prints it unquoted and dotted; see the Display impl.

Fields

qualifier: String

column: String

WrongArity

v7.39.2 — a built-in called with the wrong NUMBER of arguments.

Its own variant rather than a formatted string, because the two wires word it differently AND number it differently, and one of them has to tell it apart from “no such function”: MySQL 9.7.2 answers 1582 Incorrect parameter count in the call to native function 'LOWER' here and 1305 for a name it does not know, where PostgreSQL gives BOTH the same sentence.

Fields

name: String

types: String

The argument types, PostgreSQL’s own names, comma-joined.

ColumnNotFound

Fields

name: String

UnknownQualifier

Fields

qualifier: String

column: String

v7.39.2 — the column that was written after it.

PostgreSQL names only the missing table; MySQL 9.7.2 names the whole reference — Unknown column 'zz.a' in 'where clause' — and numbers it 1054, a COLUMN error. SPG answered 1146, which is what a driver reads as “that table is gone”. The name has to travel for the MySQL wire to say it.

DivisionByZero

TypeMismatch

Fields

detail: String

PlaceholderOutOfRange

v6.1.1 — $N reference past the number of bound parameters. Either the client sent too few in Bind, or the SQL has a placeholder the prepared statement didn’t account for.

Fields

n: u16

bound: u16

StackDepthExceeded

v7.38 (read01 P3.25) — the expression tree recursed deep enough to threaten a native stack overflow; we bail out with an error the way PG’s check_stack_depth() does instead of aborting the process.

Trait Implementations

impl Clone for EvalError

fn clone(&self) -> EvalError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EvalError

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

Formats the value using the given formatter.

impl Display for EvalError

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

Formats the value using the given formatter.

impl From<EvalError> for EngineError

fn from(e: EvalError) -> Self

Converts to this type from the input type.

impl PartialEq for EvalError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for EvalError