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LimitEffect

datafusion_python::datafusion_expr

Enum LimitEffect 

Source 
pub enum LimitEffect {
    None,
    Unknown,
    Relative(usize),
    Absolute(usize),
}
Expand description

the effect this function will have on the limit pushdown

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None

Does not affect the limit (i.e. this is causal)

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Unknown

Either undeclared, or dynamic (only evaluatable at run time)

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Relative(usize)

Grow the limit by N rows

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Absolute(usize)

Limit needs to be at least N rows

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