Enum DeltaSchemaError 

pub enum DeltaSchemaError {
    ColumnCollision {
        column: String,
        reserved: String,
    },
    CounterTable {
        keyspace: String,
        table: String,
        columns: String,
    },
    CqlTypeParse {
        column: String,
        source: Error,
    },
}

Errors produced by derive_delta_schema at schema-derivation time.

All errors are raised before any output bytes are written (fail-before-writing guarantee, design §“Error handling”).

Variants

ColumnCollision

A user column name collides with one of the envelope reserved names.

The error message names the colliding column, the reserved name it conflicts with, and how to supply a different prefix via DeltaSchemaOpts::envelope_prefix.

Fields

column: String

The user column name that caused the collision.

reserved: String

The reserved envelope name it collides with.

CounterTable

Counter tables cannot be projected to the delta envelope.

Cassandra counter tables use a fundamentally different on-disk format (distributed counters) that cannot be represented as simple cell deltas. Reject at schema-derivation time rather than silently producing wrong output.

Fields

keyspace: String

Keyspace of the rejected table.

table: String

Table name of the rejected table.

columns: String

Comma-separated list of counter column names.

CqlTypeParse

CQL type parsing failed during schema derivation.

Fields

column: String

The column whose type could not be parsed.

source: Error

The underlying error message.

Trait Implementations

impl Debug for DeltaSchemaError

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

Formats the value using the given formatter.

impl Display for DeltaSchemaError

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

Formats the value using the given formatter.

impl Error for DeltaSchemaError

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<DeltaSchemaError> for DeltaParquetError

fn from(source: DeltaSchemaError) -> Self

Converts to this type from the input type.