Struct LegacyStats 

pub struct LegacyStats;

Data alongside a legacy vortex.stats zone table, whose fields are named by Stat rather than by aggregate function.

The optimizer rewrites it into a Zoned plan over the zone table converted to the aggregate schema, or into its data alone when a Zoned plan already summarises the same data. Compiled unoptimized, it reads its data and prunes nothing.

Trait Implementations

impl Clone for LegacyStats

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 LegacyStats

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

Formats the value using the given formatter.

impl PlanVTable for LegacyStats

type PlanData = LegacyStatsData

Operator-specific data, excluding children.

type Metadata = EmptyMetadata

Serialized form of PlanData.

fn id(&self) -> PlanId

Returns the globally unique operator ID.

fn metadata(_plan: &Plan<Self>) -> Option<Self::Metadata>

Returns the serializable metadata for this operator.

fn with_children( plan: &Plan<Self>, children: &PlanChildren, _data: &mut Self::PlanData, ) -> VortexResult<()>

Refreshes cloned operator data after the common child container is replaced.

fn child_name(_plan: &Plan<Self>, index: usize) -> Cow<'_, str>

Returns the display name of the child at index.

fn compile( plan: &Plan<Self>, rows: Range<u64>, mask: &Mask, compiler: &mut Compiler<'_>, ) -> VortexResult<Option<Chain>>

Compiles this plan over rows of its row domain, restricted to mask, into a chain: a source and the stages after it, producing the rows mask selects in row order, or None when that is no row. rows lies within the plan’s row domain and mask is as long as rows.

fn reach( plan: &Plan<Self>, rows: Range<u64>, at: &Reach, visit: &mut dyn FnMut(SegmentId, Range<u64>), ) -> VortexResult<()>

Visits every segment compiling this plan over rows could read, under any mask, with the rows of the scanned plan it is read for, so a segment more than one reader reads is decoded once. at maps this plan’s rows to the scanned plan’s.

fn fmt(plan: &Plan<Self>, formatter: &mut Formatter<'_>) -> Result

Writes operator-specific fields after the plan’s standard display summary.