FilePruner

datafusion_pruning::file_pruner

Struct FilePruner 

Source 
pub struct FilePruner {
    predicate_generation: Option<u64>,
    predicate: Arc<dyn PhysicalExpr>,
    pruning_schema: Arc<Schema>,
    partitioned_file: PartitionedFile,
    partition_fields: Vec<FieldRef>,
    predicate_creation_errors: Count,
}
Expand description

Prune based on partition values and file-level statistics.

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§predicate_generation: Option<u64>§predicate: Arc<dyn PhysicalExpr>§pruning_schema: Arc<Schema>

Schema used for pruning, which combines the file schema and partition fields. Partition fields are always at the end, as they are during scans.

§partitioned_file: PartitionedFile§partition_fields: Vec<FieldRef>§predicate_creation_errors: Count

Implementations§

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impl FilePruner

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pub fn new( predicate: Arc<dyn PhysicalExpr>, logical_file_schema: &SchemaRef, partition_fields: Vec<FieldRef>, partitioned_file: PartitionedFile, predicate_creation_errors: Count, ) -> Result<Self>

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pub fn should_prune(&mut self) -> Result<bool>

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