Trait fastfield_codecs::Column
source · [−]pub trait Column<T: PartialOrd + Debug = u64>: Send + Sync {
fn get_val(&self, idx: u32) -> T;
fn min_value(&self) -> T;
fn max_value(&self) -> T;
fn num_vals(&self) -> u32;
fn get_range(&self, start: u64, output: &mut [T]) { ... }
fn get_docids_for_value_range(
&self,
value_range: RangeInclusive<T>,
doc_id_range: Range<u32>,
positions: &mut Vec<u32>
) { ... }
fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = T> + 'a> { ... }
}Expand description
Column provides columnar access on a field.
Required Methods
sourcefn get_val(&self, idx: u32) -> T
fn get_val(&self, idx: u32) -> T
Return the value associated with the given idx.
This accessor should return as fast as possible.
Panics
May panic if idx is greater than the column length.
sourcefn min_value(&self) -> T
fn min_value(&self) -> T
Returns the minimum value for this fast field.
This min_value may not be exact.
For instance, the min value does not take in account of possible
deleted document. All values are however guaranteed to be higher than
.min_value().
Provided Methods
sourcefn get_range(&self, start: u64, output: &mut [T])
fn get_range(&self, start: u64, output: &mut [T])
Fills an output buffer with the fast field values
associated with the DocId going from
start to start + output.len().
Panics
Must panic if start + output.len() is greater than
the segment’s maxdoc.
sourcefn get_docids_for_value_range(
&self,
value_range: RangeInclusive<T>,
doc_id_range: Range<u32>,
positions: &mut Vec<u32>
)
fn get_docids_for_value_range(
&self,
value_range: RangeInclusive<T>,
doc_id_range: Range<u32>,
positions: &mut Vec<u32>
)
Get the positions of values which are in the provided value range.
Note that position == docid for single value fast fields