Trait Expression 

pub trait Expression:
    OpPrecedence
    + Send
    + Sync
    + Debug {
    // Required method
    fn write_query(
        &self,
        writer: &dyn SqlWriter,
        context: &mut Context,
        out: &mut String,
    );

    // Provided methods
    fn is_ordered(&self) -> bool { ... }
    fn is_true(&self) -> bool { ... }
}

Renderable SQL expression.

Required Methods

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

Serialize the expression into out using writer.

Provided Methods

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

Trait Implementations

impl Expression for &dyn Expression

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

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, T: Expression> From<&'a T> for &'a dyn Expression

fn from(value: &'a T) -> Self

Converts to this type from the input type.

impl OpPrecedence for &dyn Expression

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

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

Implementations on Foreign Types

impl Expression for &'static str

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

impl Expression for bool

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

fn is_true(&self) -> bool

impl Expression for ()

fn write_query( &self, _writer: &dyn SqlWriter, _context: &mut Context, _out: &mut String, )

impl<T: Expression> Expression for &T

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

fn is_ordered(&self) -> bool

fn is_true(&self) -> bool

Implementors

impl Expression for &dyn Expression

impl Expression for DefaultValueType

impl Expression for Operand<'_>

impl Expression for Value

impl Expression for ColumnDef

impl Expression for ColumnRef

impl<E: Expression> Expression for Ordered<E>

impl<E: Expression> Expression for UnaryOp<E>

impl<L: Expression, R: Expression> Expression for BinaryOp<L, R>