ApexBase v1.29.0

2026-08-08

Compare with v1.28.0

• Introduce a streaming Row-Group rewrite engine for V4 storage: delta-file compaction, compressed-row-group deletes, and DROP COLUMN now merge/rewrite Row Group by Row Group via mmap into a temporary file followed by an atomic rename, so peak memory is O(largest Row Group + delta payloads) instead of the whole table — tables larger than physical memory can be compacted and restructured without OOM
• Make ALTER TABLE ADD COLUMN footer-only on mmap-only V4 tables: only the footer schema is updated, read paths synthesize all-NULL values for rows already on disk, and later compactions materialize the column; DROP COLUMN and ADD COLUMN materialize any pending delta first
• Chunk appends by row_group_size so a single large batch is split into multiple Row Groups, bounding per-RG buffers and preserving zone-map granularity regardless of batch size
• Upgrade in-memory String/Binary/StringDict column offsets from u32 to u64, eliminating silent truncation for columns larger than 4 GiB while keeping the on-disk format (u32 offsets per Row Group) unchanged and fully compatible with existing files
• Build store()/store_columnar() columns directly from borrowed Python buffers (&str / &[u8]) through a new write_typed_columns path, removing per-element String/Vec allocation and the typed intermediate copy; FTS string retention now happens only when FTS is enabled
• Fix _id leakage and missing-column padding in mmap read paths (RCIX extraction, indexed row reads, and filtered limit scans) that were exposed by footer-only ADD COLUMN, and align column projection on numeric-range filter fast paths
• Expand regression coverage with Rust and Python tests for streaming compaction across many row groups, footer-only ADD COLUMN, streaming DROP COLUMN, compressed deletes, append chunking, u64 offsets, and the borrowed-buffer write path, and refresh the storage architecture documentation
• Update the Rust crate and Python package version metadata to 1.29.0