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Fix PR comments

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This commit is contained in:
ManyTheFish 2024-02-26 15:40:15 +01:00
parent a493a50825
commit 5e83bac448
1 changed files with 32 additions and 27 deletions
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59
milli/src/update/facet/incremental.rs
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@ -18,6 +18,32 @@ use crate::update::index_documents::valid_lmdb_key;
use crate::update::MergeFn;
use crate::{CboRoaringBitmapCodec, Index, Result};
/// Enum used as a return value for the facet incremental indexing.
///
/// - `ModificationResult::InPlace` means that modifying the `facet_value` into the `level` did not have
/// an effect on the number of keys in that level. Therefore, it did not increase the number of children
/// of the parent node.
///
/// - `ModificationResult::Insert` means that modifying the `facet_value` into the `level` resulted
/// in the addition of a new key in that level, and that therefore the number of children
/// of the parent node should be incremented.
///
/// - `ModificationResult::Remove` means that modifying the `facet_value` into the `level` resulted in a change in the
/// number of keys in the level. For example, removing a document id from the facet value `3` could
/// cause it to have no corresponding document in level 0 anymore, and therefore the key was deleted
/// entirely. In that case, `ModificationResult::Remove` is returned. The parent of the deleted key must
/// then adjust its group size. If its group size falls to 0, then it will need to be deleted as well.
///
/// - `ModificationResult::Reduce/Expand` means that modifying the `facet_value` into the `level` resulted in a change in the
/// bounds of the keys of the level. For example, removing a document id from the facet value
/// `3` might have caused the facet value `3` to have no corresponding document in level 0. Therefore,
/// in level 1, the key with the left bound `3` had to be changed to the next facet value (e.g. 4).
/// In that case `ModificationResult::Reduce` is returned. The parent of the reduced key may need to adjust
/// its left bound as well.
///
/// - `ModificationResult::Nothing` means that modifying the `facet_value` didn't have any impact into the `level`.
/// This case is reachable when a document id is removed from a sub-level node but is still present in another one.
/// For example, removing `2` from a document containing `2` and `3`, the document id will removed form the `level 0` but should remain in the group node [1..4] in `level 1`.
enum ModificationResult {
InPlace,
Expand,
@ -315,6 +341,9 @@ impl FacetsUpdateIncrementalInner {
Ok(ModificationResult::Insert)
}
/// Remove the docids still present in the related sub-level nodes from the del_docids.
///
/// This process is needed to avoid removing docids from a group node where the docid is present in several sub-nodes.
fn trim_del_docids<'a>(
&self,
txn: &mut RwTxn,
@ -352,30 +381,6 @@ impl FacetsUpdateIncrementalInner {
/// ## Return
/// Returns the effect of modifying the facet value to the database on the given `level`.
///
/// - `ModificationResult::InPlace` means that modifying the `facet_value` into the `level` did not have
/// an effect on the number of keys in that level. Therefore, it did not increase the number of children
/// of the parent node.
///
/// - `ModificationResult::Insert` means that modifying the `facet_value` into the `level` resulted
/// in the addition of a new key in that level, and that therefore the number of children
/// of the parent node should be incremented.
///
/// - `ModificationResult::Remove` means that modifying the `facet_value` into the `level` resulted in a change in the
/// number of keys in the level. For example, removing a document id from the facet value `3` could
/// cause it to have no corresponding document in level 0 anymore, and therefore the key was deleted
/// entirely. In that case, `ModificationResult::Remove` is returned. The parent of the deleted key must
/// then adjust its group size. If its group size falls to 0, then it will need to be deleted as well.
///
/// - `ModificationResult::Reduce/Expand` means that modifying the `facet_value` into the `level` resulted in a change in the
/// bounds of the keys of the level. For example, removing a document id from the facet value
/// `3` might have caused the facet value `3` to have no corresponding document in level 0. Therefore,
/// in level 1, the key with the left bound `3` had to be changed to the next facet value (e.g. 4).
/// In that case `ModificationResult::Reduce` is returned. The parent of the reduced key may need to adjust
/// its left bound as well.
///
/// - `ModificationResult::Nothing` means that modifying the `facet_value` didn't have any impact into the `level`.
/// This case is reachable when a document id is removed from a sub-level node but is still present in another one.
/// For example, removing `2` from a document containing `2` and `3`, the document id will removed form the `level 0` but should remain in the group node [1..4] in `level 1`.
fn modify_in_level(
&self,
txn: &mut RwTxn,
@ -465,7 +470,7 @@ impl FacetsUpdateIncrementalInner {
if updated_value.size < self.max_group_size {
// If there are docids to delete, trim them avoiding unexpected removal.
let del_docids = del_docids
if let Some(del_docids) = del_docids
.map(|ids| {
self.trim_del_docids(
txn,
@ -477,8 +482,8 @@ impl FacetsUpdateIncrementalInner {
)
})
.transpose()?
.filter(|ids| !ids.is_empty());
if let Some(del_docids) = del_docids {
.filter(|ids| !ids.is_empty())
{
updated_value.bitmap -= &*del_docids;
insertion_value_was_modified = true;
}