Enum ColumnTypeSpec 

pub enum ColumnTypeSpec {
    Scalar(ScalarType),
    DateTime64 {
        datetime64: DateTime64Spec,
    },
    Nullable {
        nullable: Box<ColumnTypeSpec>,
    },
    LowCardinality {
        low_cardinality: Box<ColumnTypeSpec>,
    },
    Array {
        array: StringOnly,
    },
    Map {
        map: (StringOnly, StringOnly),
    },
}

A column type as supplied by untrusted input — the allowlisted recursive shape. Mirrors the TS ColumnTypeSpec: a bare scalar string, or a single-key wrapper object (nullable / lowCardinality / array / map).

Variants

Scalar(ScalarType)

DateTime64

Parametrised DateTime64(precision[, 'timezone']). JSON: {"datetime64": {"precision": 3, "timezone": "UTC"}}. The single datetime64 key keeps the untagged match unambiguous against the other wrappers.

Fields

datetime64: DateTime64Spec

Nullable

Fields

nullable: Box<ColumnTypeSpec>

LowCardinality

Fields

low_cardinality: Box<ColumnTypeSpec>

Array

Fields

array: StringOnly

Map

Fields

map: (StringOnly, StringOnly)

Implementations

impl ColumnTypeSpec

pub fn to_ch_type(&self) -> String

The ClickHouse type string for this spec.

For ColumnTypeSpec::DateTime64 this trusts the spec to be valid; untrusted precision/timezone must be checked first via ColumnTypeSpec::validate (the table builder does this in its per-column loop).

pub fn is_datetime64(&self) -> bool

Whether a DateTime64 is at the core (so a TTL move expression must wrap it in toDateTime(...)). Propagates through Nullable/LowCardinality and covers both the bare ScalarType::DateTime64 and the parametrised ColumnTypeSpec::DateTime64 variant.

pub fn validate(&self) -> Result<(), SchemaError>

Validate any embedded untrusted parameters (currently the parametrised DateTime64 precision + timezone) before this type is rendered to SQL. Recurses through Nullable/LowCardinality. Identifier-shaped scalars/arrays/ maps have nothing to validate here.

Trait Implementations

impl Clone for ColumnTypeSpec

fn clone(&self) -> ColumnTypeSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnTypeSpec

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ColumnTypeSpec

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ColumnTypeSpec

impl PartialEq for ColumnTypeSpec

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ColumnTypeSpec