remove unused code

milli/src/external_documents_ids.rs

@@ -2,7 +2,6 @@ use std::collections::HashMap;
 
 use heed::types::{OwnedType, Str};
 use heed::{Database, RoIter, RoTxn, RwTxn};
-use roaring::RoaringBitmap;
 
 use crate::{DocumentId, BEU32};
 
@@ -44,23 +43,6 @@ impl ExternalDocumentsIds {
         Ok(map)
     }
 
-    /// Looks for the internal ids in the passed bitmap, and returns an iterator over the mapping between
-    /// these internal ids and their external id.
-    ///
-    /// The returned iterator has `Result<(String, DocumentId), RoaringBitmap>` as `Item`,
-    /// where the returned values can be:
-    /// - `Ok((external_id, internal_id))`: if a mapping was found
-    /// - `Err(remaining_ids)`: if the external ids for some of the requested internal ids weren't found.
-    ///   In that case the returned bitmap contains the internal ids whose external ids were not found after traversing
-    ///   the entire fst.
-    pub fn find_external_id_of<'t>(
-        &self,
-        rtxn: &'t RoTxn,
-        internal_ids: RoaringBitmap,
-    ) -> heed::Result<ExternalToInternalOwnedIterator<'t>> {
-        self.0.iter(rtxn).map(|iter| ExternalToInternalOwnedIterator { iter, internal_ids })
-    }
-
     /// Applies the list of operations passed as argument, modifying the current external to internal id mapping.
     ///
     /// If the list contains multiple operations on the same external id, then the result is unspecified.
@@ -91,56 +73,3 @@ impl ExternalDocumentsIds {
         self.0.iter(rtxn)
     }
 }
-
-/// An iterator over mappings between requested internal ids and external ids.
-///
-/// See [`ExternalDocumentsIds::find_external_id_of`] for details.
-pub struct ExternalToInternalOwnedIterator<'t> {
-    iter: RoIter<'t, Str, OwnedType<BEU32>>,
-    internal_ids: RoaringBitmap,
-}
-
-impl<'t> Iterator for ExternalToInternalOwnedIterator<'t> {
-    /// A result indicating if a mapping was found, or if the stream was exhausted without finding all internal ids.
-    type Item = Result<(&'t str, DocumentId), RoaringBitmap>;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        // if all requested ids were found, we won't find any other, so short-circuit
-        if self.internal_ids.is_empty() {
-            return None;
-        }
-        loop {
-            let (external, internal) = match self.iter.next() {
-                Some(Ok((external, internal))) => (external, internal),
-                // TODO manage this better, remove panic
-                Some(Err(e)) => panic!("{}", e),
-                _ => {
-                    // we exhausted the stream but we still have some internal ids to find
-                    let remaining_ids = std::mem::take(&mut self.internal_ids);
-                    return Some(Err(remaining_ids));
-                    // note: next calls to `next` will return `None` since we replaced the internal_ids
-                    // with the default empty bitmap
-                }
-            };
-            let internal = internal.get();
-            let was_contained = self.internal_ids.remove(internal);
-            if was_contained {
-                return Some(Ok((external, internal)));
-            }
-        }
-    }
-}
-
-impl<'t> ExternalToInternalOwnedIterator<'t> {
-    /// Returns the bitmap of internal ids whose external id are yet to be found
-    pub fn remaining_internal_ids(&self) -> &RoaringBitmap {
-        &self.internal_ids
-    }
-
-    /// Consumes this iterator and returns an iterator over only the external ids, ignoring the internal ids.
-    ///
-    /// Use this when you don't need the mapping between the external and the internal ids.
-    pub fn only_external_ids(self) -> impl Iterator<Item = Result<String, RoaringBitmap>> + 't {
-        self.map(|res| res.map(|(external, _internal)| external.to_owned()))
-    }
-}

milli/src/update/index_documents/helpers/merge_functions.rs

@@ -12,18 +12,6 @@ use crate::Result;
 
 pub type MergeFn = for<'a> fn(&[u8], &[Cow<'a, [u8]>]) -> Result<Cow<'a, [u8]>>;
 
-#[allow(unused)]
-pub fn concat_u32s_array<'a>(_key: &[u8], values: &[Cow<'a, [u8]>]) -> Result<Cow<'a, [u8]>> {
-    if values.len() == 1 {
-        Ok(values[0].clone())
-    } else {
-        let capacity = values.iter().map(|v| v.len()).sum::<usize>();
-        let mut output = Vec::with_capacity(capacity);
-        values.iter().for_each(|integers| output.extend_from_slice(integers));
-        Ok(Cow::Owned(output))
-    }
-}
-
 pub fn serialize_roaring_bitmap(bitmap: &RoaringBitmap, buffer: &mut Vec<u8>) -> io::Result<()> {
     buffer.clear();
     buffer.reserve(bitmap.serialized_size());

milli/src/update/index_documents/helpers/mod.rs

@@ -13,11 +13,10 @@ pub use grenad_helpers::{
     GrenadParameters, MergeableReader,
 };
 pub use merge_functions::{
-    concat_u32s_array, keep_first, keep_latest_obkv, merge_btreeset_string,
-    merge_cbo_roaring_bitmaps, merge_deladd_cbo_roaring_bitmaps,
-    merge_deladd_cbo_roaring_bitmaps_into_cbo_roaring_bitmap, merge_roaring_bitmaps,
-    obkvs_keep_last_addition_merge_deletions, obkvs_merge_additions_and_deletions,
-    serialize_roaring_bitmap, MergeFn,
+    keep_first, keep_latest_obkv, merge_btreeset_string, merge_cbo_roaring_bitmaps,
+    merge_deladd_cbo_roaring_bitmaps, merge_deladd_cbo_roaring_bitmaps_into_cbo_roaring_bitmap,
+    merge_roaring_bitmaps, obkvs_keep_last_addition_merge_deletions,
+    obkvs_merge_additions_and_deletions, serialize_roaring_bitmap, MergeFn,
 };
 
 use crate::MAX_WORD_LENGTH;
@@ -46,11 +45,6 @@ where
     Some((head, tail))
 }
 
-#[allow(unused)]
-pub fn read_u32_ne_bytes(bytes: &[u8]) -> impl Iterator<Item = u32> + '_ {
-    bytes.chunks_exact(4).flat_map(TryInto::try_into).map(u32::from_ne_bytes)
-}
-
 /// Converts an fst Stream into an HashSet of Strings.
 pub fn fst_stream_into_hashset<'f, I, S>(stream: I) -> HashSet<Vec<u8>>
 where