Method load_graph_sections

atomic-repository/src/redb_change_store/queries.rs:92–123

Load all graph sections for a change. Reads from CHANGE_GRAPH only. This is the "thin apply" path — the minimum data needed to apply a change to the repository DAG. # Returns A vector of decompressed graph section payloads, ordered by file index.

(&self, hash: &[u8; 32])

    ///
    /// A vector of decompressed graph section payloads, ordered by file index.
    pub fn load_graph_sections(&self, hash: &[u8; 32]) -> RedbStoreResult<Vec<StoredSection>> {
        let meta = self.load_meta(hash)?;
        let txn = self.db().begin_read()?;
        let table = txn.open_table(tables::CHANGE_GRAPH)?;

        let mut sections = Vec::with_capacity(meta.graph_section_count as usize);

        for idx in 0..meta.graph_section_count {
            let key = tables::encode_change_file_key(hash, idx);
            if let Some(value) = table.get(&key)? {
                let compressed = value.value();
                let decompressed = zstd::decode_all(compressed).map_err(|e| {
                    RedbStoreError::Corrupt(format!(
                        "graph section {} decompression failed: {}",
                        idx, e
                    ))
                })?;

                // Extract path from the payload (it's a postcard-encoded GraphSectionPayload)
                let path = extract_path_from_payload(&decompressed);

                sections.push(StoredSection {
                    section_type: SectionType::Graph,
                    payload: decompressed,
                    path,
                    file_index: idx,
                });
            }
        }

        Ok(sections)
    }

    /// Load all semantic sections for a change.
    ///