Struct SchemaDriftSpec 

pub struct SchemaDriftSpec {
    pub on_drift: OnDrift,
    pub allow_type_widening: bool,
    pub on_incompatible: OnIncompatible,
    pub relax_nullability_on_missing: bool,
}

User-facing schema: config block (pipeline level).

Fields

on_drift: OnDrift

Policy applied when drift is detected.

allow_type_widening: bool

Whether a lossless widening counts as evolvable (vs incompatible). Only consulted by evolve. Default: true.

on_incompatible: OnIncompatible

evolve only: action for an incompatible residue. Default: fail.

relax_nullability_on_missing: bool

evolve only: whether the absence of a destination NOT NULL column from a page may drop that column’s NOT NULL constraint.

Default false: a column merely omitted from one batch is not evidence the column is genuinely optional (a transient/partial page omits it just as readily as a real schema change), so auto-relaxing would silently and irreversibly weaken the destination’s integrity (issue #194 / F28). When false, an omitted required column is left untouched — a page that genuinely lacks a required value then fails loudly at write time rather than degrading the schema. Set true only when you deliberately want missing-column omission to relax the constraint. Nullability relaxation driven by an observed null value in a present column (a widening that adds null) is unaffected by this flag — that is evidence-based, not omission-based.

Trait Implementations

impl Clone for SchemaDriftSpec

fn clone(&self) -> SchemaDriftSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SchemaDriftSpec

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SchemaDriftSpec

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for SchemaDriftSpec

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for SchemaDriftSpec

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for SchemaDriftSpec

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SchemaDriftSpec