Enum ExecutionStep 

pub enum ExecutionStep {
    SSTableScan {
        table: TableId,
        predicates: Vec<SSTablePredicate>,
        projection: Vec<String>,
    },
    Filter {
        expression: WhereExpression,
    },
    Sort {
        order_by: OrderByClause,
    },
    Aggregate {
        plan: AggregationPlan,
    },
    Limit {
        count: u64,
        offset: Option<u64>,
    },
    PerPartitionLimit {
        count: u64,
    },
    Project {
        columns: Vec<SelectExpression>,
    },
}

Individual execution step

Variants

SSTableScan

Fields

table: TableId

predicates: Vec<SSTablePredicate>

projection: Vec<String>

Filter

Fields

expression: WhereExpression

Sort

Fields

order_by: OrderByClause

Aggregate

Fields

plan: AggregationPlan

Limit

Fields

count: u64

offset: Option<u64>

PerPartitionLimit

Cap rows emitted per partition key, applied upstream of Limit (Cassandra PER PARTITION LIMIT, Issue #757).

Fields

count: u64

Project

Fields

columns: Vec<SelectExpression>

Implementations

impl ExecutionStep

pub fn variant_name(&self) -> &'static str

Static variant label for diagnostics. Data-safety (issue #1694): this intentionally returns only the variant NAME (a shape), never the step’s contents (predicate values, filter expressions, literals), so it is safe to log at any level.

Trait Implementations

impl Clone for ExecutionStep

fn clone(&self) -> ExecutionStep

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExecutionStep

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

Formats the value using the given formatter.