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FilterBuilder

datatypes::compute

Struct FilterBuilder 

pub struct FilterBuilder {
    filter: BooleanArray,
    count: usize,
    strategy: IterationStrategy,
}
Expand description

A builder to construct FilterPredicate

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§filter: BooleanArray§count: usize§strategy: IterationStrategy

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impl FilterBuilder

pub fn new(filter: &BooleanArray) -> FilterBuilder

Create a new FilterBuilder that can be used to construct a FilterPredicate

pub fn optimize(self) -> FilterBuilder

Compute an optimized representation of the provided filter mask that can be applied to an array more quickly.

When filtering multiple arrays (e.g. a [RecordBatch] or a [StructArray] with multiple fields), optimizing the filter can provide significant performance benefits.

However, optimization takes time and can have a larger memory footprint than the original mask, so it is often faster to filter a single array, without filter optimization.

pub fn is_optimize_beneficial(data_type: &DataType) -> bool

Determines if calling FilterBuilder::optimize is beneficial for the given type even when filtering just a single array.

See FilterBuilder::optimize for more details.

pub fn build(self) -> FilterPredicate

Construct the final FilterPredicate

Trait Implementations§

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impl Debug for FilterBuilder

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

Formats the value using the given formatter. Read more

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