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FixpointRulePlan

uni_db::query::df_graph

Struct FixpointRulePlan 

Source 
pub struct FixpointRulePlan {
Show 13 fields
    pub name: String,
    pub clauses: Vec<FixpointClausePlan>,
    pub yield_schema: Arc<Schema>,
    pub key_column_indices: Vec<usize>,
    pub priority: Option<i64>,
    pub has_fold: bool,
    pub fold_bindings: Vec<FoldBinding>,
    pub having: Vec<Expr>,
    pub has_best_by: bool,
    pub best_by_criteria: Vec<SortCriterion>,
    pub has_priority: bool,
    pub deterministic: bool,
    pub prob_column_name: Option<String>,

}
Expand description

Physical plan for a single rule in a fixpoint stratum.

Fields§

§name: String

Rule name.

§clauses: Vec<FixpointClausePlan>

Clause bodies (each evaluates to candidate rows).

§yield_schema: Arc<Schema>

Output schema for this rule’s derived relation.

§key_column_indices: Vec<usize>

Indices of KEY columns within yield_schema.

§priority: Option<i64>

Priority value (if PRIORITY semantics apply).

§has_fold: bool

Whether this rule has FOLD semantics.

§fold_bindings: Vec<FoldBinding>

FOLD bindings for post-fixpoint aggregation.

§having: Vec<Expr>

Post-FOLD filter expressions (HAVING semantics).

§has_best_by: bool

Whether this rule has BEST BY semantics.

§best_by_criteria: Vec<SortCriterion>

BEST BY sort criteria for post-fixpoint selection.

§has_priority: bool

Whether this rule has PRIORITY semantics.

§deterministic: bool

Whether BEST BY should apply a deterministic secondary sort for tie-breaking. When false, tied rows are selected non-deterministically (faster but not repeatable across runs).

§prob_column_name: Option<String>

Name of the PROB column in this rule’s yield schema, if any.

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impl Debug for FixpointRulePlan

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

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