Enum TableRef 

pub enum TableRef {
    Cte {
        nesting: usize,
        index: usize,
    },
    Derived(TableDerived),
    Table(TableId),
    Arg(ExprArg),
}

A reference to a table within a SourceTable.

Each entry in SourceTable::tables is a TableRef that identifies where data comes from: a schema table, a CTE, a derived subquery, or a placeholder argument.

Examples

use toasty_core::stmt::TableRef;
use toasty_core::schema::db::TableId;

let table_ref = TableRef::Table(TableId(0));
assert!(table_ref.references(TableId(0)));
assert!(!table_ref.is_cte());

Variants

Cte

A reference to a CTE defined in a WITH clause.

Fields

nesting: usize

How many nesting levels up the CTE is defined relative to this reference.

index: usize

The index of the CTE within the With::ctes vector.

Derived(TableDerived)

A derived table (inline subquery).

Table(TableId)

A schema-defined table.

Arg(ExprArg)

A placeholder that will be replaced with a derived table at a later compilation stage.

Implementations

impl TableRef

pub fn references(&self, table_id: TableId) -> bool

Returns true if this ref points to the given schema table.

pub fn is_cte(&self) -> bool

Returns true if this is a Cte reference.

Trait Implementations

impl Clone for TableRef

fn clone(&self) -> TableRef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TableRef

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

Formats the value using the given formatter.

impl From<ExprArg> for TableRef

fn from(value: ExprArg) -> TableRef

Converts to this type from the input type.

impl From<TableId> for TableRef

fn from(value: TableId) -> TableRef

Converts to this type from the input type.

impl From<TableRef> for Source

fn from(value: TableRef) -> Source

Converts to this type from the input type.

impl PartialEq<TableId> for TableRef

fn eq(&self, other: &TableId) -> 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 PartialEq for TableRef

fn eq(&self, other: &TableRef) -> 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 TableRef