Enum ColumnOrigin 

pub enum ColumnOrigin {
    Table(TableColumn),
    Expression,
    Unknown,
}

The possible statuses for our knowledge of the origin of a Column.

Variants

Table(TableColumn)

The column is known to originate from a table.

Included is the table name and original column name.

Expression

The column originates from an expression, or else its origin could not be determined.

Unknown

The database driver does not know the column origin at this time.

This may happen if:

• The connection is in the middle of executing a query, and cannot query the catalog to fetch this information.
• The connection does not have access to the database catalog.
• The implementation of Column did not override Column::origin().

Implementations

impl ColumnOrigin

pub fn table_column(&self) -> Option<&TableColumn>

Returns the true column origin, if known.

Trait Implementations

impl Clone for ColumnOrigin

fn clone(&self) -> ColumnOrigin

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnOrigin

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

Formats the value using the given formatter.

impl Default for ColumnOrigin

fn default() -> ColumnOrigin

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ColumnOrigin

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ColumnOrigin

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.