Struct ColumnDef 

pub struct ColumnDef {
    pub column_ref: ColumnRef,
    pub column_type: &'static str,
    pub value: Value,
    pub nullable: bool,
    pub default: Option<Box<dyn Expression>>,
    pub primary_key: PrimaryKeyType,
    pub unique: bool,
    pub references: Option<ColumnRef>,
    pub on_delete: Option<Action>,
    pub on_update: Option<Action>,
    pub passive: bool,
    pub comment: &'static str,
}

Declarative specification of a table column.

Fields

column_ref: ColumnRef

Column identity.

column_type: &'static str

Explicit SQL type override (empty => infer from value).

value: Value

Value describing column type and shape (arrays/maps/decimal precision).

nullable: bool

Nullability flag.

default: Option<Box<dyn Expression>>

Default value (expression rendered by SqlWriter).

primary_key: PrimaryKeyType

Primary key participation.

unique: bool

Unique constraint (single column only, composite handled in the TableDef).

references: Option<ColumnRef>

Foreign key target column.

on_delete: Option<Action>

Action for deletes.

on_update: Option<Action>

Action for updates.

passive: bool

Passive columns are skipped when generating INSERT value lists (DEFAULT used).

comment: &'static str

Optional human-readable comment.

Implementations

impl ColumnDef

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

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

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

Trait Implementations

impl Debug for ColumnDef

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

Formats the value using the given formatter.

impl Default for ColumnDef

fn default() -> ColumnDef

Returns the “default value” for a type.

impl Expression for ColumnDef

fn write_query( &self, writer: &dyn SqlWriter, context: &mut Context, out: &mut String, )

Serialize the expression into the output string using the dialect writer.

fn is_ordered(&self) -> bool

Whether this expression carries ordering (ASC/DESC) information.

impl<'a> From<&'a ColumnDef> for &'a ColumnRef

fn from(value: &'a ColumnDef) -> Self

Converts to this type from the input type.

impl OpPrecedence for ColumnDef

fn precedence(&self, _writer: &dyn SqlWriter) -> i32

Lower numbers bind weaker; writers parenthesize when child precedence <= operator precedence.