Enum ColumnRef 

pub enum ColumnRef {
    Column(Arc<dyn Iden>),
    TableColumn(Arc<dyn Iden>, Arc<dyn Iden>),
    SchemaTableColumn(Arc<dyn Iden>, Arc<dyn Iden>, Arc<dyn Iden>),
    Asterisk,
    TableAsterisk(Arc<dyn Iden>),
}

Available on native and crate feature database only.

Reference to a column in a SQL query.

This enum represents different ways to reference a column, from simple column names to fully qualified references.

Variants

Column(Arc<dyn Iden>)

Simple column reference (e.g., name)

TableColumn(Arc<dyn Iden>, Arc<dyn Iden>)

Table-qualified column reference (e.g., users.name)

SchemaTableColumn(Arc<dyn Iden>, Arc<dyn Iden>, Arc<dyn Iden>)

Schema and table-qualified column reference (e.g., public.users.name)

Asterisk

Asterisk for selecting all columns (e.g., *)

TableAsterisk(Arc<dyn Iden>)

Table-qualified asterisk (e.g., users.*)

Implementations

impl ColumnRef

pub fn column<I>(column: I) -> ColumnRef

where I: IntoIden,

Create a simple column reference.

Example

use reinhardt_query::ColumnRef;

let col = ColumnRef::column("name");

pub fn table_column<T, C>(table: T, column: C) -> ColumnRef

where T: IntoIden, C: IntoIden,

Create a table-qualified column reference.

Example

use reinhardt_query::ColumnRef;

let col = ColumnRef::table_column("users", "name");

pub fn schema_table_column<S, T, C>(schema: S, table: T, column: C) -> ColumnRef

where S: IntoIden, T: IntoIden, C: IntoIden,

Create a schema and table-qualified column reference.

Example

use reinhardt_query::ColumnRef;

let col = ColumnRef::schema_table_column("public", "users", "name");

pub fn asterisk() -> ColumnRef

Create an asterisk reference for all columns.

Example

use reinhardt_query::ColumnRef;

let col = ColumnRef::asterisk();

pub fn table_asterisk<T>(table: T) -> ColumnRef

where T: IntoIden,

Create a table-qualified asterisk reference.

Example

use reinhardt_query::ColumnRef;

let col = ColumnRef::table_asterisk("users");

Trait Implementations

impl Clone for ColumnRef

fn clone(&self) -> ColumnRef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnRef

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

Formats the value using the given formatter.

impl From<ColumnRef> for SimpleExpr

fn from(c: ColumnRef) -> SimpleExpr

Converts to this type from the input type.

impl IntoColumnRef for ColumnRef

fn into_column_ref(self) -> ColumnRef

Convert this type into a ColumnRef.