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update extract fid word count docids

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ManyTheFish 2023-10-23 16:34:49 +02:00 committed by Louis Dureuil
parent b26dc9aabe
commit ba90a5ec0e
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1 changed files with 43 additions and 8 deletions
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45
milli/src/update/index_documents/extract/extract_fid_word_count_docids.rs
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@ -4,11 +4,12 @@ use std::io::{self, BufReader};
use obkv::KvReaderU16;
use super::helpers::{
create_sorter, merge_cbo_roaring_bitmaps, sorter_into_reader, try_split_array_at,
create_sorter, merge_deladd_cbo_roaring_bitmaps, sorter_into_reader, try_split_array_at,
GrenadParameters,
};
use crate::error::SerializationError;
use crate::index::db_name::DOCID_WORD_POSITIONS;
use crate::update::del_add::{DelAdd, KvReaderDelAdd, KvWriterDelAdd};
use crate::Result;
const MAX_COUNTED_WORDS: usize = 30;
@ -29,7 +30,7 @@ pub fn extract_fid_word_count_docids<R: io::Read + io::Seek>(
let mut fid_word_count_docids_sorter = create_sorter(
grenad::SortAlgorithm::Unstable,
merge_cbo_roaring_bitmaps,
merge_deladd_cbo_roaring_bitmaps,
indexer.chunk_compression_type,
indexer.chunk_compression_level,
indexer.max_nb_chunks,
@ -37,18 +38,52 @@ pub fn extract_fid_word_count_docids<R: io::Read + io::Seek>(
);
let mut key_buffer = Vec::new();
let mut value_buffer = Vec::new();
let mut cursor = docid_word_positions.into_cursor()?;
while let Some((key, value)) = cursor.move_on_next()? {
let (document_id_bytes, fid_bytes) = try_split_array_at(key)
.ok_or(SerializationError::Decoding { db_name: Some(DOCID_WORD_POSITIONS) })?;
let document_id = u32::from_be_bytes(document_id_bytes);
let word_count = KvReaderU16::new(&value).iter().take(MAX_COUNTED_WORDS + 1).count();
if word_count <= MAX_COUNTED_WORDS {
let del_add_reader = KvReaderDelAdd::new(&value);
let deletion = del_add_reader
// get deleted words
.get(DelAdd::Deletion)
// count deleted words
.map(|deletion| KvReaderU16::new(deletion).iter().take(MAX_COUNTED_WORDS + 1).count())
// keep the count if under or equal to MAX_COUNTED_WORDS
.filter(|&word_count| word_count <= MAX_COUNTED_WORDS);
let addition = del_add_reader
// get added words
.get(DelAdd::Addition)
// count added words
.map(|addition| KvReaderU16::new(addition).iter().take(MAX_COUNTED_WORDS + 1).count())
// keep the count if under or equal to MAX_COUNTED_WORDS
.filter(|&word_count| word_count <= MAX_COUNTED_WORDS);
if deletion != addition {
// Insert deleted word count in sorter if exist.
if let Some(word_count) = deletion {
value_buffer.clear();
let mut value_writer = KvWriterDelAdd::new(&mut value_buffer);
value_writer.insert(DelAdd::Deletion, document_id.to_ne_bytes()).unwrap();
key_buffer.clear();
key_buffer.extend_from_slice(fid_bytes);
key_buffer.push(word_count as u8);
fid_word_count_docids_sorter.insert(&key_buffer, document_id.to_ne_bytes())?;
fid_word_count_docids_sorter
.insert(&key_buffer, value_writer.into_inner().unwrap())?;
}
// Insert added word count in sorter if exist.
if let Some(word_count) = addition {
value_buffer.clear();
let mut value_writer = KvWriterDelAdd::new(&mut value_buffer);
value_writer.insert(DelAdd::Addition, document_id.to_ne_bytes()).unwrap();
key_buffer.clear();
key_buffer.extend_from_slice(fid_bytes);
key_buffer.push(word_count as u8);
fid_word_count_docids_sorter
.insert(&key_buffer, value_writer.into_inner().unwrap())?;
}
}
}