Struct CheckConstraintDef 

pub struct CheckConstraintDef {
    pub table: &'static str,
    pub name: &'static str,
    pub value: &'static str,
}

A named CHECK constraint that can be built in a const.

Examples

use drizzle_types::sqlite::ddl::CheckConstraintDef;

const CHECK: CheckConstraintDef = CheckConstraintDef::new("users", "ck_age")
    .value("age >= 0");

Fields

table: &'static str

Parent table name

name: &'static str

Constraint name

value: &'static str

SQL boolean expression, without CHECK (...)

Implementations

impl CheckConstraintDef

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

Creates a check constraint with an empty expression; set it with value.

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

Sets the SQL boolean expression.

pub const fn into_check_constraint(self) -> CheckConstraint

Converts to the runtime CheckConstraint.

Trait Implementations

impl Clone for CheckConstraintDef

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 CheckConstraintDef

impl Debug for CheckConstraintDef

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

Formats the value using the given formatter.

impl Default for CheckConstraintDef

fn default() -> Self

Returns the “default value” for a type.

impl Eq for CheckConstraintDef

impl From<CheckConstraintDef> for CheckConstraint

fn from(def: CheckConstraintDef) -> Self

Converts to this type from the input type.

impl Hash for CheckConstraintDef

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 CheckConstraintDef

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CheckConstraintDef