Type Alias parquet::file::serialized_reader::ReadGroupPredicate
source · pub type ReadGroupPredicate = Box<dyn FnMut(&RowGroupMetaData, usize) -> bool>;
Expand description
A predicate for filtering row groups, invoked with the metadata and index
of each row group in the file. Only row groups for which the predicate
evaluates to true
will be scanned
Aliased Type§
struct ReadGroupPredicate(/* private fields */);