Trait Expression 

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

    // Provided methods
    fn accept_visitor(
        &self,
        _matcher: &mut dyn ExpressionVisitor,
        _writer: &dyn SqlWriter,
        _context: &mut Context,
        _out: &mut DynQuery,
    ) -> bool { ... }
    fn as_identifier(&self, context: &mut Context) -> String { ... }
}

Renderable SQL expression.

Required Methods

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

Generates the SQL representation of this expression.

Provided Methods

fn accept_visitor( &self, _matcher: &mut dyn ExpressionVisitor, _writer: &dyn SqlWriter, _context: &mut Context, _out: &mut DynQuery, ) -> bool

Traverses the expression with a visitor.

Returns true if the visitor matched this node.

fn as_identifier(&self, context: &mut Context) -> String

Renders the expression as a string suitable for use as an identifier.

Trait Implementations

impl Expression for &dyn Expression

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

Generates the SQL representation of this expression.

fn accept_visitor( &self, matcher: &mut dyn ExpressionVisitor, writer: &dyn SqlWriter, context: &mut Context, out: &mut DynQuery, ) -> bool

Traverses the expression with a visitor.

fn as_identifier(&self, context: &mut Context) -> String

Renders the expression as a string suitable for use as an identifier.

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.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl Expression for &'static str

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

fn accept_visitor( &self, matcher: &mut dyn ExpressionVisitor, writer: &dyn SqlWriter, context: &mut Context, out: &mut DynQuery, ) -> bool

impl Expression for ()

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

impl Expression for Box<[u8]>

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

impl Expression for Cow<'static, str>

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

impl Expression for Date

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

impl Expression for Decimal

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

impl Expression for Duration

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

impl Expression for Duration

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

impl Expression for OffsetDateTime

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

impl Expression for PrimitiveDateTime

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

impl Expression for String

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

impl Expression for Time

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

impl Expression for UtcDateTime

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

impl Expression for Uuid

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

impl Expression for Value

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

impl Expression for bool

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

fn accept_visitor( &self, matcher: &mut dyn ExpressionVisitor, writer: &dyn SqlWriter, context: &mut Context, out: &mut DynQuery, ) -> bool

impl Expression for char

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

impl Expression for f32

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

impl Expression for f64

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

impl Expression for i8

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

impl Expression for i16

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

impl Expression for i32

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

impl Expression for i64

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

impl Expression for i128

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

impl Expression for isize

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

impl Expression for u8

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

impl Expression for u16

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

impl Expression for u32

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

impl Expression for u64

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

impl Expression for u128

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

impl Expression for usize

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

impl<T: AsValue + Expression> Expression for Option<T>

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

impl<T: Expression> Expression for &T

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

fn accept_visitor( &self, matcher: &mut dyn ExpressionVisitor, writer: &dyn SqlWriter, context: &mut Context, out: &mut DynQuery, ) -> bool

fn as_identifier(&self, context: &mut Context) -> String

impl<T: Expression> Expression for Arc<T>

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

fn accept_visitor( &self, matcher: &mut dyn ExpressionVisitor, writer: &dyn SqlWriter, context: &mut Context, out: &mut DynQuery, ) -> bool

impl<T: Expression> Expression for Box<T>

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

fn accept_visitor( &self, matcher: &mut dyn ExpressionVisitor, writer: &dyn SqlWriter, context: &mut Context, out: &mut DynQuery, ) -> bool

Implementors

impl Expression for &dyn Expression

impl Expression for ColumnDef

impl Expression for ColumnRef

impl Expression for DefaultValueType

impl Expression for Interval

impl Expression for NA

impl Expression for Operand<'_>

impl Expression for tank_core::Value

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

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

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

impl<const W: u8, const S: u8> Expression for FixedDecimal<W, S>