Enum CaptureAgg 

pub enum CaptureAgg {
    Min(String),
    Max(String),
    Sum(String),
}

A capture point extracted from an op template.

Capture points mark result fields that should be extracted from the operation result and stored as named variables for use in subsequent operations or verification.

Formats:

• [username] — capture “username” as “username” (single value)
• [username as u1] — capture “username”, store as “u1” (single value)
• [(List) field] — capture with type assertion
• [*] — capture all available fields
• [@keys] — slurp: collect every row’s keys column into a Value::Json array. Use when the result has multiple rows and the consumer needs all per-row column values as a list (e.g. recall-evaluator’s actual: reads).
• [@col as values] — slurp with alias. Row-set aggregation for a declarative capture: reduce an array-of-rows body (or addressed sub-array) to one scalar by folding the named field across rows. Declared with a :min(field) / :max(field) / :sum(field) suffix on the capture path. Motivating case: system_views.sstable_tasks carries several concurrent tasks in MIXED units (a byte-denominated data compaction plus an ordinal-denominated index build) — a /0/... capture pins whichever row sorts first, so a saturated byte task masks the still-running merge; :min(completion_ratio) reads the least-complete task, which is the drain’s true state.

Variants

Min(String)

Numeric minimum of field across rows.

Max(String)

Numeric maximum of field across rows.

Sum(String)

Numeric sum of field across rows.

Trait Implementations

impl Clone for CaptureAgg

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CaptureAgg

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CaptureAgg

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for CaptureAgg

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for CaptureAgg

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for CaptureAgg