Struct Select 

pub struct Select {
    pub returning: Returning,
    pub source: Source,
    pub filter: Filter,
    pub distinct: bool,
}

A SELECT expression within a query body.

Represents the combination of a data source, a filter (WHERE clause), and a projection (RETURNING/SELECT list). This is the most common query body type.

At the model level, the source is a model with optional association includes. After lowering, the source becomes a table with joins.

Examples

use toasty_core::stmt::{Select, Source, Filter};
use toasty_core::schema::app::ModelId;

let select = Select::new(Source::from(ModelId(0)), Filter::ALL);
assert!(select.source.is_model());

Fields

returning: Returning

The projection (what columns/fields to return).

source: Source

The data source (FROM clause). At the model level this is a model reference; at the table level this is a table with joins.

filter: Filter

The filter (WHERE clause).

distinct: bool

When true, the query removes duplicate rows (SELECT DISTINCT). Used by multi-step (via) .include() lowering, where a JOIN through the path can yield duplicate target rows that must collapse to distinct targets.

Implementations

impl Select

pub fn new(source: impl Into<Source>, filter: impl Into<Filter>) -> Self

Creates a new Select with the given source and filter, defaulting to a model-level returning clause with no includes.

pub fn add_filter(&mut self, filter: impl Into<Filter>)

Adds an additional filter, AND-ing it with any existing filter.

Trait Implementations

impl Clone for Select

fn clone(&self) -> Select

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Select

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

Formats the value using the given formatter.

impl From<Select> for ExprSet

fn from(value: Select) -> Self

Converts to this type from the input type.

impl From<Select> for Query

fn from(value: Select) -> Self

Converts to this type from the input type.

impl From<Select> for Statement

fn from(value: Select) -> Self

Converts to this type from the input type.

impl From<SourceModel> for Select

fn from(value: SourceModel) -> Self

Converts to this type from the input type.

impl From<TableId> for Select

fn from(value: TableId) -> Self

Converts to this type from the input type.

impl<'a, T: Resolve> IntoExprTarget<'a, T> for &'a Select

fn into_expr_target(self, schema: &'a T) -> ExprTarget<'a>

Converts self into an ExprTarget using the provided schema.

impl Node for Select

fn visit<V: Visit>(&self, visit: V)

Traverses this node with an immutable visitor.

fn visit_mut<V: VisitMut>(&mut self, visit: V)

Traverses this node with a mutable visitor.

impl PartialEq for Select

fn eq(&self, other: &Select) -> 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 StructuralPartialEq for Select