Struct Features 

pub struct Features<'a> {
    pub group_by: bool,
    pub split_by: bool,
    pub filter_ops: IndexMap<ColumnType, Vec<Cow<'a, str>>>,
    pub aggregates: IndexMap<ColumnType, Vec<AggSpec<'a>>>,
    pub sort: bool,
    pub expressions: bool,
    pub on_update: bool,
}

Describes the capabilities supported by a virtual server handler.

This struct is returned by VirtualServerHandler::get_features to inform clients about which operations are available.

Fields

group_by: bool

Whether group-by aggregation is supported.

split_by: bool

Whether split-by (pivot) operations are supported.

filter_ops: IndexMap<ColumnType, Vec<Cow<'a, str>>>

Available filter operators per column type.

aggregates: IndexMap<ColumnType, Vec<AggSpec<'a>>>

Available aggregate functions per column type.

sort: bool

Whether sorting is supported.

expressions: bool

Whether computed expressions are supported.

on_update: bool

Whether update callbacks are supported.

Trait Implementations

impl<'a> Debug for Features<'a>

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

Formats the value using the given formatter.

impl<'a> Default for Features<'a>

fn default() -> Features<'a>

Returns the “default value” for a type.

impl<'de, 'a> Deserialize<'de> for Features<'a>

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'a> From<Features<'a>> for GetFeaturesResp

fn from(value: Features<'a>) -> GetFeaturesResp

Converts to this type from the input type.