Enum ColumnDtype 

pub enum ColumnDtype {
    Integer,
    Real,
    Text,
}

The SQLite storage class a column is materialized as.

Inference is “smallest type that fits every non-empty cell” (Phase 21, crate::ingest): all-integer → ColumnDtype::Integer, else all-numeric → ColumnDtype::Real, else ColumnDtype::Text. The Display form is the SQLite declared type used in CREATE TABLE.

Variants

Integer

64-bit signed integer (INTEGER).

Real

64-bit IEEE-754 float (REAL).

Text

UTF-8 text (TEXT).

Implementations

impl ColumnDtype

pub fn sqlite_decl_type(self) -> &'static str

The SQLite declared type written into CREATE TABLE for this dtype.

Identical to the Display form; provided as an explicit, self-documenting name at the SQL call sites.

pub fn from_decl_type(decl: &str) -> Self

Map a SQLite PRAGMA table_info declared type back to a ColumnDtype.

Case-insensitive on the leading token: INTEGER → ColumnDtype::Integer, REAL (or any REA…/FLOA…/DOUB… numeric affinity) → ColumnDtype::Real, everything else → ColumnDtype::Text. Used by DataStore::summarize to recover the dtype of an already-materialized table.

Trait Implementations

impl Clone for ColumnDtype

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ColumnDtype

impl Debug for ColumnDtype

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ColumnDtype

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ColumnDtype

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

Formats the value using the given formatter.

impl Eq for ColumnDtype

impl PartialEq for ColumnDtype

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ColumnDtype

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 ColumnDtype