Enum CardinalityEffect

pub enum CardinalityEffect {
    Unknown,
    Equal,
    LowerEqual,
    GreaterEqual,
}

Indicates the effect an execution plan operator will have on the cardinality of its input stream

Variants

Unknown

Unknown effect. This is the default

Equal

The operator is guaranteed to produce exactly one row for each input row

LowerEqual

The operator may produce fewer output rows than it receives input rows

GreaterEqual

The operator may produce more output rows than it receives input rows