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| <span id="520">520</span> |
| <span id="521">521</span> |
| <span id="522">522</span> |
| <span id="523">523</span> |
| <span id="524">524</span> |
| <span id="525">525</span> |
| </pre><pre class="rust"><code><span class="kw">use </span>std::io; |
| |
| <span class="kw">use </span>common::VInt; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::directory::{FileSlice, OwnedBytes}; |
| <span class="kw">use </span><span class="kw">crate</span>::fieldnorm::FieldNormReader; |
| <span class="kw">use </span><span class="kw">crate</span>::postings::compression::{BlockDecoder, VIntDecoder, COMPRESSION_BLOCK_SIZE}; |
| <span class="kw">use </span><span class="kw">crate</span>::postings::{BlockInfo, FreqReadingOption, SkipReader}; |
| <span class="kw">use </span><span class="kw">crate</span>::query::Bm25Weight; |
| <span class="kw">use </span><span class="kw">crate</span>::schema::IndexRecordOption; |
| <span class="kw">use crate</span>::{DocId, Score, TERMINATED}; |
| |
| <span class="kw">fn </span>max_score<I: Iterator<Item = Score>>(<span class="kw-2">mut </span>it: I) -> <span class="prelude-ty">Option</span><Score> { |
| it.next().map(|first| it.fold(first, Score::max)) |
| } |
| |
| <span class="doccomment">/// `BlockSegmentPostings` is a cursor iterating over blocks |
| /// of documents. |
| /// |
| /// # Warning |
| /// |
| /// While it is useful for some very specific high-performance |
| /// use cases, you should prefer using `SegmentPostings` for most usage. |
| </span><span class="attribute">#[derive(Clone)] |
| </span><span class="kw">pub struct </span>BlockSegmentPostings { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) doc_decoder: BlockDecoder, |
| loaded_offset: usize, |
| freq_decoder: BlockDecoder, |
| freq_reading_option: FreqReadingOption, |
| block_max_score_cache: <span class="prelude-ty">Option</span><Score>, |
| doc_freq: u32, |
| data: OwnedBytes, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) skip_reader: SkipReader, |
| } |
| |
| <span class="kw">fn </span>decode_bitpacked_block( |
| doc_decoder: <span class="kw-2">&mut </span>BlockDecoder, |
| freq_decoder_opt: <span class="prelude-ty">Option</span><<span class="kw-2">&mut </span>BlockDecoder>, |
| data: <span class="kw-2">&</span>[u8], |
| doc_offset: DocId, |
| doc_num_bits: u8, |
| tf_num_bits: u8, |
| ) { |
| <span class="kw">let </span>num_consumed_bytes = doc_decoder.uncompress_block_sorted(data, doc_offset, doc_num_bits); |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(freq_decoder) = freq_decoder_opt { |
| freq_decoder.uncompress_block_unsorted(<span class="kw-2">&</span>data[num_consumed_bytes..], tf_num_bits); |
| } |
| } |
| |
| <span class="kw">fn </span>decode_vint_block( |
| doc_decoder: <span class="kw-2">&mut </span>BlockDecoder, |
| freq_decoder_opt: <span class="prelude-ty">Option</span><<span class="kw-2">&mut </span>BlockDecoder>, |
| data: <span class="kw-2">&</span>[u8], |
| doc_offset: DocId, |
| num_vint_docs: usize, |
| ) { |
| <span class="kw">let </span>num_consumed_bytes = |
| doc_decoder.uncompress_vint_sorted(data, doc_offset, num_vint_docs, TERMINATED); |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(freq_decoder) = freq_decoder_opt { |
| freq_decoder.uncompress_vint_unsorted( |
| <span class="kw-2">&</span>data[num_consumed_bytes..], |
| num_vint_docs, |
| TERMINATED, |
| ); |
| } |
| } |
| |
| <span class="kw">fn </span>split_into_skips_and_postings( |
| doc_freq: u32, |
| <span class="kw-2">mut </span>bytes: OwnedBytes, |
| ) -> io::Result<(<span class="prelude-ty">Option</span><OwnedBytes>, OwnedBytes)> { |
| <span class="kw">if </span>doc_freq < COMPRESSION_BLOCK_SIZE <span class="kw">as </span>u32 { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>((<span class="prelude-val">None</span>, bytes)); |
| } |
| <span class="kw">let </span>skip_len = VInt::deserialize_u64(<span class="kw-2">&mut </span>bytes)<span class="question-mark">? </span><span class="kw">as </span>usize; |
| <span class="kw">let </span>(skip_data, postings_data) = bytes.split(skip_len); |
| <span class="prelude-val">Ok</span>((<span class="prelude-val">Some</span>(skip_data), postings_data)) |
| } |
| |
| <span class="kw">impl </span>BlockSegmentPostings { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>open( |
| doc_freq: u32, |
| data: FileSlice, |
| record_option: IndexRecordOption, |
| requested_option: IndexRecordOption, |
| ) -> io::Result<BlockSegmentPostings> { |
| <span class="kw">let </span>freq_reading_option = <span class="kw">match </span>(record_option, requested_option) { |
| (IndexRecordOption::Basic, <span class="kw">_</span>) => FreqReadingOption::NoFreq, |
| (<span class="kw">_</span>, IndexRecordOption::Basic) => FreqReadingOption::SkipFreq, |
| (<span class="kw">_</span>, <span class="kw">_</span>) => FreqReadingOption::ReadFreq, |
| }; |
| |
| <span class="kw">let </span>bytes = data.read_bytes()<span class="question-mark">?</span>; |
| <span class="kw">let </span>(skip_data_opt, postings_data) = split_into_skips_and_postings(doc_freq, bytes)<span class="question-mark">?</span>; |
| <span class="kw">let </span>skip_reader = <span class="kw">match </span>skip_data_opt { |
| <span class="prelude-val">Some</span>(skip_data) => SkipReader::new(skip_data, doc_freq, record_option), |
| <span class="prelude-val">None </span>=> SkipReader::new(OwnedBytes::empty(), doc_freq, record_option), |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>block_segment_postings = BlockSegmentPostings { |
| doc_decoder: BlockDecoder::with_val(TERMINATED), |
| loaded_offset: usize::MAX, |
| freq_decoder: BlockDecoder::with_val(<span class="number">1</span>), |
| freq_reading_option, |
| block_max_score_cache: <span class="prelude-val">None</span>, |
| doc_freq, |
| data: postings_data, |
| skip_reader, |
| }; |
| block_segment_postings.load_block(); |
| <span class="prelude-val">Ok</span>(block_segment_postings) |
| } |
| |
| <span class="doccomment">/// Returns the block_max_score for the current block. |
| /// It does not require the block to be loaded. For instance, it is ok to call this method |
| /// after having called `.shallow_advance(..)`. |
| /// |
| /// See `TermScorer::block_max_score(..)` for more information. |
| </span><span class="kw">pub fn </span>block_max_score( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| fieldnorm_reader: <span class="kw-2">&</span>FieldNormReader, |
| bm25_weight: <span class="kw-2">&</span>Bm25Weight, |
| ) -> Score { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(score) = <span class="self">self</span>.block_max_score_cache { |
| <span class="kw">return </span>score; |
| } |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(skip_reader_max_score) = <span class="self">self</span>.skip_reader.block_max_score(bm25_weight) { |
| <span class="comment">// if we are on a full block, the skip reader should have the block max information |
| // for us |
| </span><span class="self">self</span>.block_max_score_cache = <span class="prelude-val">Some</span>(skip_reader_max_score); |
| <span class="kw">return </span>skip_reader_max_score; |
| } |
| <span class="comment">// this is the last block of the segment posting list. |
| // If it is actually loaded, we can compute block max manually. |
| </span><span class="kw">if </span><span class="self">self</span>.block_is_loaded() { |
| <span class="kw">let </span>docs = <span class="self">self</span>.doc_decoder.output_array().iter().cloned(); |
| <span class="kw">let </span>freqs = <span class="self">self</span>.freq_decoder.output_array().iter().cloned(); |
| <span class="kw">let </span>bm25_scores = docs.zip(freqs).map(|(doc, term_freq)| { |
| <span class="kw">let </span>fieldnorm_id = fieldnorm_reader.fieldnorm_id(doc); |
| bm25_weight.score(fieldnorm_id, term_freq) |
| }); |
| <span class="kw">let </span>block_max_score = max_score(bm25_scores).unwrap_or(<span class="number">0.0</span>); |
| <span class="self">self</span>.block_max_score_cache = <span class="prelude-val">Some</span>(block_max_score); |
| <span class="kw">return </span>block_max_score; |
| } |
| <span class="comment">// We do not have access to any good block max value. We return bm25_weight.max_score() |
| // as it is a valid upperbound. |
| // |
| // We do not cache it however, so that it gets computed when once block is loaded. |
| </span>bm25_weight.max_score() |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>freq_reading_option(<span class="kw-2">&</span><span class="self">self</span>) -> FreqReadingOption { |
| <span class="self">self</span>.freq_reading_option |
| } |
| |
| <span class="comment">// Resets the block segment postings on another position |
| // in the postings file. |
| // |
| // This is useful for enumerating through a list of terms, |
| // and consuming the associated posting lists while avoiding |
| // reallocating a `BlockSegmentPostings`. |
| // |
| // # Warning |
| // |
| // This does not reset the positions list. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>reset(<span class="kw-2">&mut </span><span class="self">self</span>, doc_freq: u32, postings_data: OwnedBytes) -> io::Result<()> { |
| <span class="kw">let </span>(skip_data_opt, postings_data) = |
| split_into_skips_and_postings(doc_freq, postings_data)<span class="question-mark">?</span>; |
| <span class="self">self</span>.data = postings_data; |
| <span class="self">self</span>.block_max_score_cache = <span class="prelude-val">None</span>; |
| <span class="self">self</span>.loaded_offset = usize::MAX; |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(skip_data) = skip_data_opt { |
| <span class="self">self</span>.skip_reader.reset(skip_data, doc_freq); |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.skip_reader.reset(OwnedBytes::empty(), doc_freq); |
| } |
| <span class="self">self</span>.doc_freq = doc_freq; |
| <span class="self">self</span>.load_block(); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="doccomment">/// Returns the overall number of documents in the block postings. |
| /// It does not take in account whether documents are deleted or not. |
| /// |
| /// This `doc_freq` is simply the sum of the length of all of the blocks |
| /// length, and it does not take in account deleted documents. |
| </span><span class="kw">pub fn </span>doc_freq(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.doc_freq |
| } |
| |
| <span class="doccomment">/// Returns the array of docs in the current block. |
| /// |
| /// Before the first call to `.advance()`, the block |
| /// returned by `.docs()` is empty. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>docs(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[DocId] { |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.block_is_loaded()); |
| <span class="self">self</span>.doc_decoder.output_array() |
| } |
| |
| <span class="doccomment">/// Returns a full block, regardless of whether the block is complete or incomplete ( |
| /// as it happens for the last block of the posting list). |
| /// |
| /// In the latter case, the block is guaranteed to be padded with the sentinel value: |
| /// `TERMINATED`. The array is also guaranteed to be aligned on 16 bytes = 128 bits. |
| /// |
| /// This method is useful to run SSE2 linear search. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>full_block(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[DocId; COMPRESSION_BLOCK_SIZE] { |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.block_is_loaded()); |
| <span class="self">self</span>.doc_decoder.full_output() |
| } |
| |
| <span class="doccomment">/// Return the document at index `idx` of the block. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>doc(<span class="kw-2">&</span><span class="self">self</span>, idx: usize) -> u32 { |
| <span class="self">self</span>.doc_decoder.output(idx) |
| } |
| |
| <span class="doccomment">/// Return the array of `term freq` in the block. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>freqs(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[u32] { |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.block_is_loaded()); |
| <span class="self">self</span>.freq_decoder.output_array() |
| } |
| |
| <span class="doccomment">/// Return the frequency at index `idx` of the block. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>freq(<span class="kw-2">&</span><span class="self">self</span>, idx: usize) -> u32 { |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.block_is_loaded()); |
| <span class="self">self</span>.freq_decoder.output(idx) |
| } |
| |
| <span class="doccomment">/// Returns the length of the current block. |
| /// |
| /// All blocks have a length of `NUM_DOCS_PER_BLOCK`, |
| /// except the last block that may have a length |
| /// of any number between 1 and `NUM_DOCS_PER_BLOCK - 1` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>block_len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.block_is_loaded()); |
| <span class="self">self</span>.doc_decoder.output_len |
| } |
| |
| <span class="doccomment">/// Position on a block that may contains `target_doc`. |
| /// |
| /// If all docs are smaller than target, the block loaded may be empty, |
| /// or be the last an incomplete VInt block. |
| </span><span class="kw">pub fn </span>seek(<span class="kw-2">&mut </span><span class="self">self</span>, target_doc: DocId) { |
| <span class="self">self</span>.shallow_seek(target_doc); |
| <span class="self">self</span>.load_block(); |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>position_offset(<span class="kw-2">&</span><span class="self">self</span>) -> u64 { |
| <span class="self">self</span>.skip_reader.position_offset() |
| } |
| |
| <span class="doccomment">/// Dangerous API! This calls seek on the skip list, |
| /// but does not `.load_block()` afterwards. |
| /// |
| /// `.load_block()` needs to be called manually afterwards. |
| /// If all docs are smaller than target, the block loaded may be empty, |
| /// or be the last an incomplete VInt block. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>shallow_seek(<span class="kw-2">&mut </span><span class="self">self</span>, target_doc: DocId) { |
| <span class="kw">if </span><span class="self">self</span>.skip_reader.seek(target_doc) { |
| <span class="self">self</span>.block_max_score_cache = <span class="prelude-val">None</span>; |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>block_is_loaded(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.loaded_offset == <span class="self">self</span>.skip_reader.byte_offset() |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>load_block(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">let </span>offset = <span class="self">self</span>.skip_reader.byte_offset(); |
| <span class="kw">if </span><span class="self">self</span>.loaded_offset == offset { |
| <span class="kw">return</span>; |
| } |
| <span class="self">self</span>.loaded_offset = offset; |
| <span class="kw">match </span><span class="self">self</span>.skip_reader.block_info() { |
| BlockInfo::BitPacked { |
| doc_num_bits, |
| tf_num_bits, |
| .. |
| } => { |
| decode_bitpacked_block( |
| <span class="kw-2">&mut </span><span class="self">self</span>.doc_decoder, |
| <span class="kw">if let </span>FreqReadingOption::ReadFreq = <span class="self">self</span>.freq_reading_option { |
| <span class="prelude-val">Some</span>(<span class="kw-2">&mut </span><span class="self">self</span>.freq_decoder) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>}, |
| <span class="kw-2">&</span><span class="self">self</span>.data.as_slice()[offset..], |
| <span class="self">self</span>.skip_reader.last_doc_in_previous_block, |
| doc_num_bits, |
| tf_num_bits, |
| ); |
| } |
| BlockInfo::VInt { num_docs } => { |
| <span class="kw">let </span>data = { |
| <span class="kw">if </span>num_docs == <span class="number">0 </span>{ |
| <span class="kw-2">&</span>[] |
| } <span class="kw">else </span>{ |
| <span class="kw-2">&</span><span class="self">self</span>.data.as_slice()[offset..] |
| } |
| }; |
| decode_vint_block( |
| <span class="kw-2">&mut </span><span class="self">self</span>.doc_decoder, |
| <span class="kw">if let </span>FreqReadingOption::ReadFreq = <span class="self">self</span>.freq_reading_option { |
| <span class="prelude-val">Some</span>(<span class="kw-2">&mut </span><span class="self">self</span>.freq_decoder) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>}, |
| data, |
| <span class="self">self</span>.skip_reader.last_doc_in_previous_block, |
| num_docs <span class="kw">as </span>usize, |
| ); |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Advance to the next block. |
| /// |
| /// Returns false if and only if there is no remaining block. |
| </span><span class="kw">pub fn </span>advance(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.skip_reader.advance(); |
| <span class="self">self</span>.block_max_score_cache = <span class="prelude-val">None</span>; |
| <span class="self">self</span>.load_block(); |
| } |
| |
| <span class="doccomment">/// Returns an empty segment postings object |
| </span><span class="kw">pub fn </span>empty() -> BlockSegmentPostings { |
| BlockSegmentPostings { |
| doc_decoder: BlockDecoder::with_val(TERMINATED), |
| loaded_offset: <span class="number">0</span>, |
| freq_decoder: BlockDecoder::with_val(<span class="number">1</span>), |
| freq_reading_option: FreqReadingOption::NoFreq, |
| block_max_score_cache: <span class="prelude-val">None</span>, |
| doc_freq: <span class="number">0</span>, |
| data: OwnedBytes::empty(), |
| skip_reader: SkipReader::new(OwnedBytes::empty(), <span class="number">0</span>, IndexRecordOption::Basic), |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use </span>common::HasLen; |
| |
| <span class="kw">use </span><span class="kw">super</span>::BlockSegmentPostings; |
| <span class="kw">use </span><span class="kw">crate</span>::core::Index; |
| <span class="kw">use </span><span class="kw">crate</span>::docset::{DocSet, TERMINATED}; |
| <span class="kw">use </span><span class="kw">crate</span>::postings::compression::COMPRESSION_BLOCK_SIZE; |
| <span class="kw">use </span><span class="kw">crate</span>::postings::postings::Postings; |
| <span class="kw">use </span><span class="kw">crate</span>::postings::SegmentPostings; |
| <span class="kw">use </span><span class="kw">crate</span>::schema::{IndexRecordOption, Schema, Term, INDEXED}; |
| <span class="kw">use </span><span class="kw">crate</span>::DocId; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_empty_segment_postings() { |
| <span class="kw">let </span><span class="kw-2">mut </span>postings = SegmentPostings::empty(); |
| <span class="macro">assert_eq!</span>(postings.doc(), TERMINATED); |
| <span class="macro">assert_eq!</span>(postings.advance(), TERMINATED); |
| <span class="macro">assert_eq!</span>(postings.advance(), TERMINATED); |
| <span class="macro">assert_eq!</span>(postings.doc_freq(), <span class="number">0</span>); |
| <span class="macro">assert_eq!</span>(postings.len(), <span class="number">0</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_empty_postings_doc_returns_terminated() { |
| <span class="kw">let </span><span class="kw-2">mut </span>postings = SegmentPostings::empty(); |
| <span class="macro">assert_eq!</span>(postings.doc(), TERMINATED); |
| <span class="macro">assert_eq!</span>(postings.advance(), TERMINATED); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_empty_postings_doc_term_freq_returns_0() { |
| <span class="kw">let </span>postings = SegmentPostings::empty(); |
| <span class="macro">assert_eq!</span>(postings.term_freq(), <span class="number">1</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_empty_block_segment_postings() { |
| <span class="kw">let </span><span class="kw-2">mut </span>postings = BlockSegmentPostings::empty(); |
| <span class="macro">assert!</span>(postings.docs().is_empty()); |
| <span class="macro">assert_eq!</span>(postings.doc_freq(), <span class="number">0</span>); |
| postings.advance(); |
| <span class="macro">assert!</span>(postings.docs().is_empty()); |
| <span class="macro">assert_eq!</span>(postings.doc_freq(), <span class="number">0</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_block_segment_postings() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>block_segments = build_block_postings(<span class="kw-2">&</span>(<span class="number">0</span>..<span class="number">100_000</span>).collect::<Vec<u32>>())<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>offset: u32 = <span class="number">0u32</span>; |
| <span class="comment">// checking that the `doc_freq` is correct |
| </span><span class="macro">assert_eq!</span>(block_segments.doc_freq(), <span class="number">100_000</span>); |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>block = block_segments.docs(); |
| <span class="kw">if </span>block.is_empty() { |
| <span class="kw">break</span>; |
| } |
| <span class="kw">for </span>(i, doc) <span class="kw">in </span>block.iter().cloned().enumerate() { |
| <span class="macro">assert_eq!</span>(offset + (i <span class="kw">as </span>u32), doc); |
| } |
| offset += block.len() <span class="kw">as </span>u32; |
| block_segments.advance(); |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_skip_right_at_new_block() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>doc_ids = (<span class="number">0</span>..<span class="number">128</span>).collect::<Vec<u32>>(); |
| <span class="comment">// 128 is missing |
| </span>doc_ids.push(<span class="number">129</span>); |
| doc_ids.push(<span class="number">130</span>); |
| { |
| <span class="kw">let </span>block_segments = build_block_postings(<span class="kw-2">&</span>doc_ids)<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>docset = SegmentPostings::from_block_postings(block_segments, <span class="prelude-val">None</span>); |
| <span class="macro">assert_eq!</span>(docset.seek(<span class="number">128</span>), <span class="number">129</span>); |
| <span class="macro">assert_eq!</span>(docset.doc(), <span class="number">129</span>); |
| <span class="macro">assert_eq!</span>(docset.advance(), <span class="number">130</span>); |
| <span class="macro">assert_eq!</span>(docset.doc(), <span class="number">130</span>); |
| <span class="macro">assert_eq!</span>(docset.advance(), TERMINATED); |
| } |
| { |
| <span class="kw">let </span>block_segments = build_block_postings(<span class="kw-2">&</span>doc_ids).unwrap(); |
| <span class="kw">let </span><span class="kw-2">mut </span>docset = SegmentPostings::from_block_postings(block_segments, <span class="prelude-val">None</span>); |
| <span class="macro">assert_eq!</span>(docset.seek(<span class="number">129</span>), <span class="number">129</span>); |
| <span class="macro">assert_eq!</span>(docset.doc(), <span class="number">129</span>); |
| <span class="macro">assert_eq!</span>(docset.advance(), <span class="number">130</span>); |
| <span class="macro">assert_eq!</span>(docset.doc(), <span class="number">130</span>); |
| <span class="macro">assert_eq!</span>(docset.advance(), TERMINATED); |
| } |
| { |
| <span class="kw">let </span>block_segments = build_block_postings(<span class="kw-2">&</span>doc_ids)<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>docset = SegmentPostings::from_block_postings(block_segments, <span class="prelude-val">None</span>); |
| <span class="macro">assert_eq!</span>(docset.doc(), <span class="number">0</span>); |
| <span class="macro">assert_eq!</span>(docset.seek(<span class="number">131</span>), TERMINATED); |
| <span class="macro">assert_eq!</span>(docset.doc(), TERMINATED); |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>build_block_postings(docs: <span class="kw-2">&</span>[DocId]) -> <span class="kw">crate</span>::Result<BlockSegmentPostings> { |
| <span class="kw">let </span><span class="kw-2">mut </span>schema_builder = Schema::builder(); |
| <span class="kw">let </span>int_field = schema_builder.add_u64_field(<span class="string">"id"</span>, INDEXED); |
| <span class="kw">let </span>schema = schema_builder.build(); |
| <span class="kw">let </span>index = Index::create_in_ram(schema); |
| <span class="kw">let </span><span class="kw-2">mut </span>index_writer = index.writer_for_tests()<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>last_doc = <span class="number">0u32</span>; |
| <span class="kw">for </span><span class="kw-2">&</span>doc <span class="kw">in </span>docs { |
| <span class="kw">for _ in </span>last_doc..doc { |
| index_writer.add_document(<span class="macro">doc!</span>(int_field=><span class="number">1u64</span>))<span class="question-mark">?</span>; |
| } |
| index_writer.add_document(<span class="macro">doc!</span>(int_field=><span class="number">0u64</span>))<span class="question-mark">?</span>; |
| last_doc = doc + <span class="number">1</span>; |
| } |
| index_writer.commit()<span class="question-mark">?</span>; |
| <span class="kw">let </span>searcher = index.reader()<span class="question-mark">?</span>.searcher(); |
| <span class="kw">let </span>segment_reader = searcher.segment_reader(<span class="number">0</span>); |
| <span class="kw">let </span>inverted_index = segment_reader.inverted_index(int_field).unwrap(); |
| <span class="kw">let </span>term = Term::from_field_u64(int_field, <span class="number">0u64</span>); |
| <span class="kw">let </span>term_info = inverted_index.get_term_info(<span class="kw-2">&</span>term)<span class="question-mark">?</span>.unwrap(); |
| <span class="kw">let </span>block_postings = inverted_index |
| .read_block_postings_from_terminfo(<span class="kw-2">&</span>term_info, IndexRecordOption::Basic)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(block_postings) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_block_segment_postings_seek() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>docs = <span class="macro">vec!</span>[<span class="number">0</span>]; |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..<span class="number">1300 </span>{ |
| docs.push((i * i / <span class="number">100</span>) + i); |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>block_postings = build_block_postings(<span class="kw-2">&</span>docs[..])<span class="question-mark">?</span>; |
| <span class="kw">for </span>i <span class="kw">in </span><span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">424</span>, <span class="number">10000</span>] { |
| block_postings.seek(<span class="kw-2">*</span>i); |
| <span class="kw">let </span>docs = block_postings.docs(); |
| <span class="macro">assert!</span>(docs[<span class="number">0</span>] <= <span class="kw-2">*</span>i); |
| <span class="macro">assert!</span>(docs.last().cloned().unwrap_or(<span class="number">0u32</span>) >= <span class="kw-2">*</span>i); |
| } |
| block_postings.seek(<span class="number">100_000</span>); |
| <span class="macro">assert_eq!</span>(block_postings.doc(COMPRESSION_BLOCK_SIZE - <span class="number">1</span>), TERMINATED); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_reset_block_segment_postings() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>schema_builder = Schema::builder(); |
| <span class="kw">let </span>int_field = schema_builder.add_u64_field(<span class="string">"id"</span>, INDEXED); |
| <span class="kw">let </span>schema = schema_builder.build(); |
| <span class="kw">let </span>index = Index::create_in_ram(schema); |
| <span class="kw">let </span><span class="kw-2">mut </span>index_writer = index.writer_for_tests()<span class="question-mark">?</span>; |
| <span class="comment">// create two postings list, one containing even number, |
| // the other containing odd numbers. |
| </span><span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..<span class="number">6 </span>{ |
| <span class="kw">let </span>doc = <span class="macro">doc!</span>(int_field=> (i % <span class="number">2</span>) <span class="kw">as </span>u64); |
| index_writer.add_document(doc)<span class="question-mark">?</span>; |
| } |
| index_writer.commit()<span class="question-mark">?</span>; |
| <span class="kw">let </span>searcher = index.reader()<span class="question-mark">?</span>.searcher(); |
| <span class="kw">let </span>segment_reader = searcher.segment_reader(<span class="number">0</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>block_segments; |
| { |
| <span class="kw">let </span>term = Term::from_field_u64(int_field, <span class="number">0u64</span>); |
| <span class="kw">let </span>inverted_index = segment_reader.inverted_index(int_field)<span class="question-mark">?</span>; |
| <span class="kw">let </span>term_info = inverted_index.get_term_info(<span class="kw-2">&</span>term)<span class="question-mark">?</span>.unwrap(); |
| block_segments = inverted_index |
| .read_block_postings_from_terminfo(<span class="kw-2">&</span>term_info, IndexRecordOption::Basic)<span class="question-mark">?</span>; |
| } |
| <span class="macro">assert_eq!</span>(block_segments.docs(), <span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">2</span>, <span class="number">4</span>]); |
| { |
| <span class="kw">let </span>term = Term::from_field_u64(int_field, <span class="number">1u64</span>); |
| <span class="kw">let </span>inverted_index = segment_reader.inverted_index(int_field)<span class="question-mark">?</span>; |
| <span class="kw">let </span>term_info = inverted_index.get_term_info(<span class="kw-2">&</span>term)<span class="question-mark">?</span>.unwrap(); |
| inverted_index.reset_block_postings_from_terminfo(<span class="kw-2">&</span>term_info, <span class="kw-2">&mut </span>block_segments)<span class="question-mark">?</span>; |
| } |
| <span class="macro">assert_eq!</span>(block_segments.docs(), <span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">5</span>]); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| </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> |
