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| </pre><pre class="rust"><code><span class="kw">use </span>std::cmp; |
| |
| <span class="kw">use </span>fastfield_codecs::Column; |
| |
| <span class="kw">use </span><span class="kw">super</span>::flat_map_with_buffer::FlatMapWithBufferIter; |
| <span class="kw">use </span><span class="kw">crate</span>::fastfield::{MultiValueIndex, MultiValuedFastFieldReader}; |
| <span class="kw">use </span><span class="kw">crate</span>::indexer::doc_id_mapping::SegmentDocIdMapping; |
| <span class="kw">use </span><span class="kw">crate</span>::schema::Field; |
| <span class="kw">use crate</span>::{DocAddress, SegmentReader}; |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>RemappedDocIdMultiValueColumn<<span class="lifetime">'a</span>> { |
| doc_id_mapping: <span class="kw-2">&</span><span class="lifetime">'a </span>SegmentDocIdMapping, |
| fast_field_readers: Vec<MultiValuedFastFieldReader<u64>>, |
| min_value: u64, |
| max_value: u64, |
| num_vals: u32, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> RemappedDocIdMultiValueColumn<<span class="lifetime">'a</span>> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new( |
| readers: <span class="kw-2">&</span><span class="lifetime">'a </span>[SegmentReader], |
| doc_id_mapping: <span class="kw-2">&</span><span class="lifetime">'a </span>SegmentDocIdMapping, |
| field: Field, |
| ) -> <span class="self">Self </span>{ |
| <span class="comment">// Our values are bitpacked and we need to know what should be |
| // our bitwidth and our minimum value before serializing any values. |
| // |
| // Computing those is non-trivial if some documents are deleted. |
| // We go through a complete first pass to compute the minimum and the |
| // maximum value and initialize our Serializer. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>num_vals = <span class="number">0</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>min_value = u64::MAX; |
| <span class="kw">let </span><span class="kw-2">mut </span>max_value = u64::MIN; |
| <span class="kw">let </span><span class="kw-2">mut </span>vals = Vec::new(); |
| <span class="kw">let </span><span class="kw-2">mut </span>fast_field_readers = Vec::with_capacity(readers.len()); |
| <span class="kw">for </span>reader <span class="kw">in </span>readers { |
| <span class="kw">let </span>ff_reader: MultiValuedFastFieldReader<u64> = reader |
| .fast_fields() |
| .typed_fast_field_multi_reader::<u64>(field) |
| .expect( |
| <span class="string">"Failed to find multivalued fast field reader. This is a bug in tantivy. \ |
| Please report."</span>, |
| ); |
| <span class="kw">for </span>doc <span class="kw">in </span>reader.doc_ids_alive() { |
| ff_reader.get_vals(doc, <span class="kw-2">&mut </span>vals); |
| <span class="kw">for </span><span class="kw-2">&</span>val <span class="kw">in </span><span class="kw-2">&</span>vals { |
| min_value = cmp::min(val, min_value); |
| max_value = cmp::max(val, max_value); |
| } |
| num_vals += vals.len(); |
| } |
| fast_field_readers.push(ff_reader); |
| <span class="comment">// TODO optimize when no deletes |
| </span>} |
| <span class="kw">if </span>min_value > max_value { |
| min_value = <span class="number">0</span>; |
| max_value = <span class="number">0</span>; |
| } |
| RemappedDocIdMultiValueColumn { |
| doc_id_mapping, |
| fast_field_readers, |
| min_value, |
| max_value, |
| num_vals: num_vals <span class="kw">as </span>u32, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Column <span class="kw">for </span>RemappedDocIdMultiValueColumn<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>get_val(<span class="kw-2">&</span><span class="self">self</span>, _pos: u32) -> u64 { |
| <span class="macro">unimplemented!</span>() |
| } |
| |
| <span class="kw">fn </span>iter(<span class="kw-2">&</span><span class="self">self</span>) -> Box<<span class="kw">dyn </span>Iterator<Item = u64> + <span class="lifetime">'_</span>> { |
| Box::new( |
| <span class="self">self</span>.doc_id_mapping |
| .iter_old_doc_addrs() |
| .flat_map_with_buffer(|old_doc_addr: DocAddress, buffer| { |
| <span class="kw">let </span>ff_reader = <span class="kw-2">&</span><span class="self">self</span>.fast_field_readers[old_doc_addr.segment_ord <span class="kw">as </span>usize]; |
| ff_reader.get_vals(old_doc_addr.doc_id, buffer); |
| }), |
| ) |
| } |
| <span class="kw">fn </span>min_value(<span class="kw-2">&</span><span class="self">self</span>) -> u64 { |
| <span class="self">self</span>.min_value |
| } |
| |
| <span class="kw">fn </span>max_value(<span class="kw-2">&</span><span class="self">self</span>) -> u64 { |
| <span class="self">self</span>.max_value |
| } |
| |
| <span class="kw">fn </span>num_vals(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.num_vals |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>RemappedDocIdMultiValueIndexColumn<<span class="lifetime">'a</span>> { |
| doc_id_mapping: <span class="kw-2">&</span><span class="lifetime">'a </span>SegmentDocIdMapping, |
| multi_value_length_readers: Vec<<span class="kw-2">&</span><span class="lifetime">'a </span>MultiValueIndex>, |
| min_value: u64, |
| max_value: u64, |
| num_vals: u32, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> RemappedDocIdMultiValueIndexColumn<<span class="lifetime">'a</span>> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new( |
| segment_and_ff_readers: <span class="kw-2">&</span><span class="lifetime">'a </span>[(<span class="kw-2">&</span><span class="lifetime">'a </span>SegmentReader, <span class="kw-2">&</span><span class="lifetime">'a </span>MultiValueIndex)], |
| doc_id_mapping: <span class="kw-2">&</span><span class="lifetime">'a </span>SegmentDocIdMapping, |
| ) -> <span class="self">Self </span>{ |
| <span class="comment">// We go through a complete first pass to compute the minimum and the |
| // maximum value and initialize our Column. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>num_vals = <span class="number">0</span>; |
| <span class="kw">let </span>min_value = <span class="number">0</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>max_value = <span class="number">0</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>multi_value_length_readers = Vec::with_capacity(segment_and_ff_readers.len()); |
| <span class="kw">for </span>segment_and_ff_reader <span class="kw">in </span>segment_and_ff_readers { |
| <span class="kw">let </span>segment_reader = segment_and_ff_reader.<span class="number">0</span>; |
| <span class="kw">let </span>multi_value_length_reader = segment_and_ff_reader.<span class="number">1</span>; |
| <span class="kw">if </span>!segment_reader.has_deletes() { |
| max_value += multi_value_length_reader.total_num_vals() <span class="kw">as </span>u64; |
| } <span class="kw">else </span>{ |
| <span class="kw">for </span>doc <span class="kw">in </span>segment_reader.doc_ids_alive() { |
| max_value += multi_value_length_reader.num_vals_for_doc(doc) <span class="kw">as </span>u64; |
| } |
| } |
| num_vals += segment_reader.num_docs(); |
| multi_value_length_readers.push(multi_value_length_reader); |
| } |
| <span class="comment">// The value range is always get_val(doc)..get_val(doc + 1) |
| </span>num_vals += <span class="number">1</span>; |
| <span class="self">Self </span>{ |
| doc_id_mapping, |
| multi_value_length_readers, |
| min_value, |
| max_value, |
| num_vals, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Column <span class="kw">for </span>RemappedDocIdMultiValueIndexColumn<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>get_val(<span class="kw-2">&</span><span class="self">self</span>, _pos: u32) -> u64 { |
| <span class="macro">unimplemented!</span>() |
| } |
| |
| <span class="kw">fn </span>iter(<span class="kw-2">&</span><span class="self">self</span>) -> Box<<span class="kw">dyn </span>Iterator<Item = u64> + <span class="lifetime">'_</span>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>offset = <span class="number">0</span>; |
| Box::new( |
| std::iter::once(<span class="number">0</span>).chain(<span class="self">self</span>.doc_id_mapping.iter_old_doc_addrs().map( |
| <span class="kw">move </span>|old_doc_addr| { |
| <span class="kw">let </span>ff_reader = |
| <span class="kw-2">&</span><span class="self">self</span>.multi_value_length_readers[old_doc_addr.segment_ord <span class="kw">as </span>usize]; |
| offset += ff_reader.num_vals_for_doc(old_doc_addr.doc_id); |
| offset <span class="kw">as </span>u64 |
| }, |
| )), |
| ) |
| } |
| <span class="kw">fn </span>min_value(<span class="kw-2">&</span><span class="self">self</span>) -> u64 { |
| <span class="self">self</span>.min_value |
| } |
| |
| <span class="kw">fn </span>max_value(<span class="kw-2">&</span><span class="self">self</span>) -> u64 { |
| <span class="self">self</span>.max_value |
| } |
| |
| <span class="kw">fn </span>num_vals(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.num_vals |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tantivy" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
