Trait Column 

pub trait Column:
    'static
    + Send
    + Sync
    + Debug {
    type Database: Database<Column = Self>;

    // Required methods
    fn ordinal(&self) -> usize;
    fn name(&self) -> &str;
    fn type_info(&self) -> &<Self::Database as Database>::TypeInfo;

    // Provided method
    fn origin(&self) -> ColumnOrigin { ... }
}

Required Associated Types

type Database: Database<Column = Self>

Required Methods

fn ordinal(&self) -> usize

Gets the column ordinal.

This can be used to unambiguously refer to this column within a row in case more than one column have the same name

fn name(&self) -> &str

Gets the column name or alias.

The column name is unreliable (and can change between database minor versions) if this column is an expression that has not been aliased.

fn type_info(&self) -> &<Self::Database as Database>::TypeInfo

Gets the type information for the column.

Provided Methods

fn origin(&self) -> ColumnOrigin

If this column comes from a table, return the table and original column name.

Returns [ColumnOrigin::Expression] if the column is the result of an expression or else the source table could not be determined.

Returns [ColumnOrigin::Unknown] if the database driver does not have that information, or has not overridden this method.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl Column for AnyColumn

type Database = Any

impl Column for PgColumn

type Database = Postgres