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read_columns_from_predicate

mito2::read::read_columns

Function read_columns_from_predicate 

Source 
pub fn read_columns_from_predicate(
    predicate: &PredicateGroup,
    metadata: &RegionMetadataRef,
) -> ReadColumns
Expand description

Build ReadColumns from PredicateGroup.

Order:

  • This function follows metadata.column_metadatas order when materializing columns from predicate-referenced names.
  • Using metadata order keeps the output deterministic for ReadColumns equality/hash checks and for cache keys derived from read columns.