Function ensureExpectedType

pkg/sql/sem/tree/eval.go:4120–4127

ensureExpectedType will return an error if a datum does not match the provided type. If the expected type is Any or if the datum is a Null type, then no error will be returned.

(exp *types.T, d Datum)

// provided type. If the expected type is Any or if the datum is a Null
// type, then no error will be returned.
func ensureExpectedType(exp *types.T, d Datum) error {
	if !(exp.Family() == types.AnyFamily || d.ResolvedType().Family() == types.UnknownFamily ||
		d.ResolvedType().Equivalent(exp)) {
		return errors.AssertionFailedf(
			"expected return type %q, got: %q", errors.Safe(exp), errors.Safe(d.ResolvedType()))
	}
	return nil
}

// Eval implements the TypedExpr interface.
func (expr *IfErrExpr) Eval(ctx *EvalContext) (Datum, error) {