Enum PlanBuildError 

#[non_exhaustive]
pub enum PlanBuildError {
    Schema(SchemaError),
    Custom(CustomPlanError),
}

Error union returned by the plan-time decode hooks (FromCell::build_plan, FromRow::build_plan, and CellPlan resolution).

This keeps plan hooks limited to schema failures and custom validation failures. At the connector boundary, each variant maps to crate::Error with ErrorKind::Decode.

Like SchemaError, this enum is non-exhaustive: downstream crates can build variants and convert through the From impls, but cannot match it exhaustively.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Schema(SchemaError)

A structured schema mismatch, from column resolution or a built-in column-type check.

Custom(CustomPlanError)

A hand-written plan’s free-form validation failure.

Trait Implementations

impl Debug for PlanBuildError

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

Formats the value using the given formatter.

impl Display for PlanBuildError

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

Formats the value using the given formatter.

impl Error for PlanBuildError

fn source(&self) -> Option<&(dyn StdError + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<CustomPlanError> for PlanBuildError

fn from(error: CustomPlanError) -> Self

Converts to this type from the input type.

impl From<PlanBuildError> for Error

fn from(error: PlanBuildError) -> Self

Converts to this type from the input type.

impl From<SchemaError> for PlanBuildError

fn from(error: SchemaError) -> Self

Converts to this type from the input type.