Struct Stats 

#[non_exhaustive]
pub struct Stats {
    pub entries: u64,
    pub min_timestamp: Option<String>,
    pub max_timestamp: Option<String>,
    pub tags: Vec<Option<String>>,
}

Aggregate metadata about the contents of an index.

Produced by Indexer::stats and consumed by the CLI stats subcommand (milestone 7) and the GET /stats HTTP endpoint (milestone 8). The shape is intentionally minimal and structural; the CLI and HTTP layers format it for human or machine consumption.

tags ordering: None (untagged rows) first, then non-null tag strings in ascending alphabetical order. This ordering is produced directly by SQLite (ORDER BY tag places NULL first in ascending order) and is not re-sorted in Rust. The CLI renders the None slot as “(untagged)”.

Marked #[non_exhaustive] so additional summary fields (e.g. distinct level counts) can be added in later milestones without breaking the public API.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

entries: u64

Total number of rows currently in the log_entries table.

min_timestamp: Option<String>

Lexically smallest timestamp value in the index, or None on an empty database. Lexical ordering is correct for ISO-8601 timestamps; see the “live design decisions” section of the project handoff.

max_timestamp: Option<String>

Lexically largest timestamp value in the index, or None on an empty database.

tags: Vec<Option<String>>

Distinct tag values observed across all rows. None represents rows with no tag (SQL NULL) and — when present — is always the first element; non-null tags follow in ascending alphabetical order.

Trait Implementations

impl Clone for Stats

fn clone(&self) -> Stats

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Stats

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.