Enum Condition

pub enum Condition<'a> {
    Conjunction(Vec<Condition<'a>>),
    Disjunction(Vec<Condition<'a>>),
    UnaryCondition(UnaryCondition<'a>),
    BinaryCondition(BinaryCondition<'a>),
    TernaryCondition(TernaryCondition<'a>),
    Value(Value<'a>),
}

This enum represents a condition tree.

Variants

Conjunction(Vec<Condition<'a>>)

A list of Conditions, that get expanded to “{} AND {} …”

Disjunction(Vec<Condition<'a>>)

A list of Conditions, that get expanded to “{} OR {} …”

UnaryCondition(UnaryCondition<'a>)

Representation of an unary condition.

BinaryCondition(BinaryCondition<'a>)

Representation of a binary condition.

TernaryCondition(TernaryCondition<'a>)

Representation of a ternary condition.

Value(Value<'a>)

Representation of a value.

Trait Implementations

impl<'a> BuildCondition<'a> for Condition<'a>

fn build_to_writer( &self, writer: &mut impl Write, dialect: DBImpl, lookup: &mut Vec<Value<'a>>, ) -> Result<(), Error>

This method is used to convert a condition to SQL without allocating a dedicated string.

fn build(&self, dialect: DBImpl, lookup: &mut Vec<Value<'a>>) -> String

This method is used to convert a condition to SQL.

impl<'a> Clone for Condition<'a>

fn clone(&self) -> Condition<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Condition<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq for Condition<'a>

fn eq(&self, other: &Condition<'a>) -> 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<'a> StructuralPartialEq for Condition<'a>