Struct ColumnDef 

pub struct ColumnDef {
    pub schema: &'static str,
    pub table: &'static str,
    pub name: &'static str,
    pub sql_type: &'static str,
    pub type_schema: Option<&'static str>,
    pub not_null: bool,
    pub default: Option<&'static str>,
    pub generated: Option<GeneratedDef>,
    pub identity: Option<IdentityDef>,
    pub dimensions: Option<i32>,
    pub collate: Option<&'static str>,
}

Const-friendly column definition for compile-time schema definitions.

Fields

schema: &'static str

Schema name

table: &'static str

Parent table name

name: &'static str

Column name

sql_type: &'static str

SQL type (e.g., “INTEGER”, “TEXT”, “VARCHAR”)

type_schema: Option<&'static str>

Type schema (for custom types)

not_null: bool

Is this column NOT NULL?

default: Option<&'static str>

Default value as string (if any)

generated: Option<GeneratedDef>

Generated column configuration

identity: Option<IdentityDef>

Identity column configuration

dimensions: Option<i32>

Array dimensions (for array types)

collate: Option<&'static str>

Collation name (e.g. "en_US", "C", "POSIX", or any custom CREATE COLLATION value). None means “use the database default collation for this column type” and no COLLATE clause is emitted.

Implementations

impl ColumnDef

pub const fn new( schema: &'static str, table: &'static str, name: &'static str, sql_type: &'static str, ) -> Self

Create a new column definition

pub const fn type_schema(self, schema: &'static str) -> Self

Set type schema (for custom types)

pub const fn not_null(self) -> Self

Set NOT NULL constraint

pub const fn default_value(self, value: &'static str) -> Self

Set default value

pub const fn generated_stored(self, expression: &'static str) -> Self

Set as generated stored column

pub const fn identity(self, identity: IdentityDef) -> Self

Set as identity column

pub const fn dimensions(self, dims: i32) -> Self

Set array dimensions

pub const fn collate(self, name: &'static str) -> Self

Set the collation for this column.

PostgreSQL treats COLLATE identifiers as quoted names — e.g. COLLATE "en_US", COLLATE "C", COLLATE "POSIX". Pass the bare name here; the DDL emitter wraps it in double quotes.

pub const fn into_column(self) -> Column

Convert to runtime Column type

Note: This method cannot be const because it needs to convert nested Option types (generated and identity) which require runtime method calls.

Trait Implementations

impl Clone for ColumnDef

fn clone(&self) -> ColumnDef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnDef

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

Formats the value using the given formatter.

impl Default for ColumnDef

fn default() -> Self

Returns the “default value” for a type.

impl From<ColumnDef> for Column

fn from(def: ColumnDef) -> Self

Converts to this type from the input type.

impl Hash for ColumnDef

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ColumnDef

fn eq(&self, other: &ColumnDef) -> 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 Copy for ColumnDef

impl Eq for ColumnDef

impl StructuralPartialEq for ColumnDef