pinot
https://github.com/apache/pinot
Java
Apache Pinot - A realtime distributed OLAP datastore
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- Issues
- Fold PhysicalColumnIndexContainer's IndexTypeMap into a presence mask and a dense reader array
- Share segment-derived FieldSpec instances across segments through a weak interner
- Materialize immutable-segment columns lazily behind an opt-in instance config (default off)
- Slim ColumnMetadataImpl to 72 bytes and derive the per-segment Schema lazily
- Store numeric column min/max as primitives instead of boxed Comparables
- Hold segment column metadata in sorted arrays and derive the map on demand
- Add late-bound materialized partition routing
- [query-runtime] Skip leaf execution for empty dynamic filter
- OPEN_STRUCT: declared child defaultNullValue is honored only for keys absent from the whole segment
- Mark the query-received log record so it can be routed independently
- Docs
- Java not yet supported