Decode a single row group into an RGWork. Safe to call from any thread (reads from the read-only mmap'd file_data_).

Decode into a caller-owned RGWork. Used by consumer-mode workers that keep a persistent per-thread RGWork to avoid per-RG buffer alloc churn - the typ

Two-phase variant: decode early_cols → build mask → decode remaining cols with mask. Used by selection-vector pushdown (a cheap VARCHAR NE filter on d

True iff the planned shape matches the inline-value fast path: primitive ORDER BY [, varchar tiebreaker] + LIMIT, output is exactly {key_col, value_co

Memcpy a VECTOR_SIZE slice [row_off, row_off+count) from `col` into `vec`.

Evaluate every ORDER BY expression on the given input chunk and append per-row keys to `out_keys`. One Value per ORDER BY clause.