Arrow

Apache Arrow in-memory columnar format reference. Zero-copy data exchange, columnar memory layout with validity bitmaps, pyarrow Table/RecordBatch/compute, Arrow Flight RPC for high-performance transfer, Dataset API with predicate pushdown, pandas/DuckDB/Polars/Spark integration, Gandiva LLVM compiler, and ADBC database connectivity.

Apache Arrow

Apache Arrow in-memory columnar format reference — zero-copy, cross-language.

Commands

Command	Description
intro	Arrow overview, zero-copy, architecture
format	Columnar layout, buffers, record batches
python	pyarrow arrays, tables, compute functions
flight	Arrow Flight RPC server/client
dataset	Dataset API, partitioning, pushdown
integration	pandas/DuckDB/Polars/Spark/R interop
gandiva	LLVM expression compiler
ecosystem	Implementations, ADBC, projects