Method update

nodedb-columnar/src/mutation/write.rs:206–222

Update a row by PK: DELETE old + INSERT new. `updates` maps column names to new values. Columns not in the map retain their existing values from the old row. Returns WAL records for both the delete and the insert. NOTE: The caller must provide the full old row values for the re-insert. This method takes the complete new row (already merged with old values).

(
        &mut self,
        old_pk: &Value,
        new_values: &[Value],
    )

    /// NOTE: The caller must provide the full old row values for the re-insert.
    /// This method takes the complete new row (already merged with old values).
    pub fn update(
        &mut self,
        old_pk: &Value,
        new_values: &[Value],
    ) -> Result<MutationResult, ColumnarError> {
        // Delete the old row.
        let delete_result = self.delete(old_pk)?;

        // Insert the new row.
        let insert_result = self.insert(new_values)?;

        // Combine WAL records.
        let mut wal_records = delete_result.wal_records;
        wal_records.extend(insert_result.wal_records);

        Ok(MutationResult { wal_records })
    }
}