RepartitionRequirementStatus

datafusion_physical_optimizer::enforce_distribution

Struct RepartitionRequirementStatus 

Source 
struct RepartitionRequirementStatus {
    requirement: Distribution,
    roundrobin_beneficial: bool,
    roundrobin_beneficial_stats: bool,
    hash_necessary: bool,
}
Expand description

A struct to keep track of repartition requirements for each child node.

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§requirement: Distribution

The distribution requirement for the node.

§roundrobin_beneficial: bool

Designates whether round robin partitioning is theoretically beneficial; i.e. the operator can actually utilize parallelism.

§roundrobin_beneficial_stats: bool

Designates whether round robin partitioning is beneficial according to the statistical information we have on the number of rows.

§hash_necessary: bool

Designates whether hash partitioning is necessary.

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