Struct ColumnDef 

pub struct ColumnDef {

    pub column_ref: ColumnRef,
    pub column_type: BTreeMap<&'static str, &'static str>,
    pub value: Value,
    pub nullable: bool,
    pub default: DefaultValueType,
    pub primary_key: PrimaryKeyType,
    pub clustering_key: bool,
    pub unique: bool,
    pub references: Option<ColumnRef>,
    pub on_delete: Option<Action>,
    pub on_update: Option<Action>,
    pub passive: bool,
    pub comment: &'static str,
}

Column specification.

Fields

column_ref: ColumnRef

Column identity.

column_type: BTreeMap<&'static str, &'static str>

Explicit SQL type override (empty means infer from value).

value: Value

Value describing column type and parameters.

nullable: bool

Nullability flag.

default: DefaultValueType

Default value (expression rendered by SqlWriter).

primary_key: PrimaryKeyType

Primary key participation.

clustering_key: bool

Defines the ordering of the rows.

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

Column name (as declared in the table definition).

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

Table name owning this column.

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

Schema name owning this column (may be empty).

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 DynQuery, )

Serialize the expression into out using writer.

fn is_ordered(&self) -> bool

True if it encodes ordering.

fn is_true(&self) -> bool

True if it is an expression that simply evaluates to true

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.