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feat: streaming column-major single-RG merge engine (PR-6b) #6409

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feat: streaming column-major single-RG merge engine (PR-6b) #6409

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1d84e85
feat: streaming column-major single-RG merge engine (PR-6b)
g-talbot May 8, 2026
add52f0
style: nightly fmt fixup for streaming.rs doc comments
g-talbot May 8, 2026
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12 changes: 7 additions & 5 deletions quickwit/quickwit-parquet-engine/src/merge/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ mod merge_order;
pub mod metadata_aggregation;
pub mod policy;
mod schema;
pub mod streaming;
mod writer;

#[cfg(test)]
Expand Down Expand Up @@ -63,11 +64,11 @@ pub struct MergeConfig {

/// Metadata extracted from input files' Parquet KV metadata.
/// All inputs must agree on sort_fields, window_start, and window_duration.
struct InputMetadata {
sort_fields: String,
window_start_secs: Option<i64>,
window_duration_secs: u32,
num_merge_ops: u32,
pub(super) struct InputMetadata {
pub(super) sort_fields: String,
pub(super) window_start_secs: Option<i64>,
pub(super) window_duration_secs: u32,
pub(super) num_merge_ops: u32,
}

/// Result of a single output file from the merge.
Expand All @@ -76,6 +77,7 @@ struct InputMetadata {
/// logical metadata (metric names, tags, time range) extracted from the
/// actual rows in this output file. When the merge produces multiple
/// outputs, each has metadata reflecting only its own rows.
#[derive(Debug)]
pub struct MergeOutputFile {
/// Path to the output Parquet file.
pub path: PathBuf,
Expand Down
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