Enum AliasAggregator 

pub enum AliasAggregator {
    Count,
    Sum {
        field: String,
    },
    Avg {
        field: String,
    },
    Min {
        field: String,
    },
    Max {
        field: String,
    },
    GroupBy {
        by_field: String,
        having: Option<ListFilter>,
        inner: Option<Box<AliasAggregator>>,
    },
}

Aggregator primitive selected by the caller of query_aggregate.

Variants

Count

COUNT(*) over the source rows.

Sum

SUM(json_extract(data, '$.<field>')).

Fields

field: String

Avg

AVG(json_extract(data, '$.<field>')).

Fields

field: String

Min

MIN(json_extract(data, '$.<field>')).

Fields

field: String

Max

MAX(json_extract(data, '$.<field>')).

Fields

field: String

GroupBy

GROUP BY <by_field> with an optional per-group inner aggregator and an optional HAVING predicate.

having is emitted as a HAVING clause after GROUP BY (Crux #2). inner is an optional scalar sub-aggregator (Sum / Avg / Min / Max); nested GroupBy is rejected at validation time in Phase 1.

Fields

by_field: String

having: Option<ListFilter>

inner: Option<Box<AliasAggregator>>

Implementations

impl AliasAggregator

pub fn validate(&self, schema: &SchemaConfig) -> Result<(), MiniAppError>

Verify that every field / by_field referenced by this aggregator is declared in schema, and recursively validate inner + having.

Trait Implementations

impl Clone for AliasAggregator

fn clone(&self) -> AliasAggregator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AliasAggregator

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AliasAggregator

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for AliasAggregator

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl Serialize for AliasAggregator

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

where __S: Serializer,

Serialize this value into the given Serde serializer.