Enum DataError 

pub enum DataError {
    Sqlite(Error),
    Csv(Error),
    Io(Error),
    InvalidIdentifier(String),
    NoSuchTable(String),
    EmptyCsv,
    InvalidNotebook(String),
}

Everything that can go wrong inside the newt-data SQLite engine.

The three #[from] variants wrap the upstream errors verbatim so the underlying cause is never lost; the remaining variants are the engine’s own invariant violations (Phase 21 — identifier safety, table existence, and the empty-CSV guard described in docs/design/centaur-data-scientist.md).

Variants

Sqlite(Error)

A SQLite operation failed (open, pragma, prepare, step, bind, …).

Csv(Error)

The CSV reader failed to parse the input (malformed record, unequal field counts under flexible = false, encoding, …).

Io(Error)

A filesystem operation failed (creating the parent dir, opening the CSV path, …).

InvalidIdentifier(String)

A table identifier supplied to ingest_csv is not a safe SQLite identifier: empty, or containing a NUL byte or a double-quote. Defense in depth on top of the always-on double-quote quoting (Phase 21 — identifier safety is a review focus).

NoSuchTable(String)

A table referenced by summarize does not exist in the database.

EmptyCsv

The CSV had no header row, so no columns could be created.

InvalidNotebook(String)

An .ipynb notebook (Phase 21.4 — crate::notebook) could not be read, parsed, or validated: the file is not valid JSON, its top-level value is not an object, its nbformat is not 4, or it is otherwise not a well-formed nbformat-4 document. The message names the offending file and the specific reason so the MCP adapter surfaces an honest, in-band tool error the model can read (never a panic). See docs/design/centaur-data-scientist.md §4.1, the notebook-artifact bullet.

Trait Implementations

impl Debug for DataError

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

Formats the value using the given formatter.

impl Display for DataError

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

Formats the value using the given formatter.

impl Error for DataError

fn source(&self) -> Option<&(dyn Error + '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<Error> for DataError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for DataError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for DataError

fn from(source: Error) -> Self

Converts to this type from the input type.