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compute_projection_mask

mito2::sst::parquet::prefilter

Function compute_projection_mask 

Source 
fn compute_projection_mask(
    column_names: &HashSet<String>,
    arrow_schema: &SchemaRef,
    parquet_schema: &SchemaDescriptor,
) -> (ProjectionMask, usize)
Expand description

Executes prefiltering on a row group.

Reads only the prefilter columns (currently the PK dictionary column), applies filters, and returns a refined [RowSelection].