IPC Prototype (#181)

Very early prototype, serde is not correctly implemented for arrays, but
the structure is almost there.

Cargo.toml

@@ -11,6 +11,8 @@ members = [
     "vortex-dict",
     "vortex-error",
     "vortex-fastlanes",
+    "vortex-flatbuffers",
+    "vortex-ipc",
     "vortex-ree",
     "vortex-roaring",
     "vortex-schema",
@@ -47,6 +49,7 @@ criterion = { version = "0.5.1", features = ["html_reports"] }
 croaring = "1.0.1"
 divan = "0.1.14"
 flatbuffers = "23.5.26"
+flexbuffers = "2.0.0"
 flatc = "0.2.2"
 half = { version = "^2", features = ["std", "num-traits"] }
 hashbrown = "0.14.3"

README.md

@@ -159,8 +159,15 @@ without prior discussion infeasible. If you are interested in contributing, plea
 
 This repo uses submodules for non-Rust dependencies (e.g., for the zig fastlanez repo). Before building make sure to run
 
-* `git submodule update --init --recursive`
-* `./zigup` (this will install the zig version required by fastlanez)
+```bash
+git submodule update --init --recursive
+
+# Install the zig version required by fastlanez
+./zigup
+
+# Install Rye from https://rye-up.com, and setup the virtualenv
+rye sync
+```
 
 ## License
 
@@ -172,24 +179,31 @@ This project is inspired by and--in some cases--directly based upon the existing
 and OSS developers.
 
 In particular, the following academic papers greatly influenced the development:
-* Maximilian Kuschewski, David Sauerwein, Adnan Alhomssi, and Viktor Leis. 2023. [BtrBlocks: Efficient Columnar Compression 
-for Data Lakes](https://www.cs.cit.tum.de/fileadmin/w00cfj/dis/papers/btrblocks.pdf). Proc. ACM Manag. Data 1, 2, 
-Article 118 (June 2023), 14 pages. https://doi.org/10.1145/3589263
-* Azim Afroozeh and Peter Boncz. [The FastLanes Compression Layout: Decoding >100 Billion Integers per Second with Scalar
-Code](https://www.vldb.org/pvldb/vol16/p2132-afroozeh.pdf). PVLDB, 16(9): 2132 - 2144, 2023.
-* Peter Boncz, Thomas Neumann, and Viktor Leis. [FSST: Fast Random Access String 
-Compression](https://www.vldb.org/pvldb/vol13/p2649-boncz.pdf).
-PVLDB, 13(11): 2649-2661, 2020.
-* Azim Afroozeh, Leonardo X. Kuffo, and Peter Boncz. 2023. [ALP: Adaptive Lossless floating-Point 
-Compression](https://ir.cwi.nl/pub/33334/33334.pdf). Proc. ACM
-Manag. Data 1, 4 (SIGMOD), Article 230 (December 2023), 26 pages. https://doi.org/10.1145/3626717
+
+* Maximilian Kuschewski, David Sauerwein, Adnan Alhomssi, and Viktor Leis.
+    2023. [BtrBlocks: Efficient Columnar Compression
+          for Data Lakes](https://www.cs.cit.tum.de/fileadmin/w00cfj/dis/papers/btrblocks.pdf). Proc. ACM Manag. Data 1,
+          2,
+          Article 118 (June 2023), 14 pages. https://doi.org/10.1145/3589263
+* Azim Afroozeh and Peter
+  Boncz. [The FastLanes Compression Layout: Decoding >100 Billion Integers per Second with Scalar
+  Code](https://www.vldb.org/pvldb/vol16/p2132-afroozeh.pdf). PVLDB, 16(9): 2132 - 2144, 2023.
+* Peter Boncz, Thomas Neumann, and Viktor Leis. [FSST: Fast Random Access String
+  Compression](https://www.vldb.org/pvldb/vol13/p2649-boncz.pdf).
+  PVLDB, 13(11): 2649-2661, 2020.
+* Azim Afroozeh, Leonardo X. Kuffo, and Peter Boncz. 2023. [ALP: Adaptive Lossless floating-Point
+  Compression](https://ir.cwi.nl/pub/33334/33334.pdf). Proc. ACM
+  Manag. Data 1, 4 (SIGMOD), Article 230 (December 2023), 26 pages. https://doi.org/10.1145/3626717
 
 Additionally, we benefited greatly from:
-* the collected OSS work of [Daniel Lemire](https://github.com/lemire), such as [FastPFor](https://github.com/lemire/FastPFor),
-and [StreamVByte](https://github.com/lemire/streamvbyte).
-* the [parquet2](https://github.com/jorgecarleitao/parquet2) project by [Jorge Leitao](https://github.com/jorgecarleitao).
+
+* the collected OSS work of [Daniel Lemire](https://github.com/lemire), such
+  as [FastPFor](https://github.com/lemire/FastPFor),
+  and [StreamVByte](https://github.com/lemire/streamvbyte).
+* the [parquet2](https://github.com/jorgecarleitao/parquet2) project
+  by [Jorge Leitao](https://github.com/jorgecarleitao).
 * the public discussions around choices of compression codecs, as well as the C++ implementations thereof,
-from [duckdb](https://github.com/duckdb/duckdb).
+  from [duckdb](https://github.com/duckdb/duckdb).
 * the existence, ideas, & implementation of the [Apache Arrow](https://arrow.apache.org) project.
 * the [Velox](https://github.com/facebookincubator/velox) project and discussions with its maintainers.
 

bench-vortex/Cargo.toml

@@ -23,6 +23,7 @@ vortex-datetime = { path = "../vortex-datetime" }
 vortex-dict = { path = "../vortex-dict" }
 vortex-error = { path = "../vortex-error", features = ["parquet"] }
 vortex-fastlanes = { path = "../vortex-fastlanes" }
+vortex-ipc = { path = "../vortex-ipc" }
 vortex-ree = { path = "../vortex-ree" }
 vortex-roaring = { path = "../vortex-roaring" }
 vortex-schema = { path = "../vortex-schema" }

bench-vortex/src/bin/ipc.rs

@@ -0,0 +1,46 @@
+use log::LevelFilter;
+use std::fs::File;
+
+use bench_vortex::reader::open_vortex;
+use bench_vortex::setup_logger;
+use bench_vortex::taxi_data::taxi_data_vortex;
+use vortex::array::primitive::PrimitiveArray;
+use vortex::array::Array;
+use vortex::compute::take::take;
+use vortex::serde::context::SerdeContext;
+use vortex_error::VortexResult;
+use vortex_ipc::iter::FallibleLendingIterator;
+use vortex_ipc::reader::StreamReader;
+use vortex_ipc::writer::StreamWriter;
+
+pub fn main() -> VortexResult<()> {
+    setup_logger(LevelFilter::Error);
+
+    let array = open_vortex(&taxi_data_vortex())?;
+    println!("Array {}", &array);
+
+    //let ipc = idempotent("ipc.vortex", |path| {
+    let ipc = "bench-vortex/data/ipc.vortex";
+    let mut write = File::create("bench-vortex/data/ipc.vortex")?;
+    let ctx = SerdeContext::default();
+    let mut writer = StreamWriter::try_new(&mut write, ctx)?;
+    writer.write(&array)?;
+    //})?;
+
+    // Now try to read from the IPC stream.
+    let mut read = File::open(ipc)?;
+    let mut ipc_reader = StreamReader::try_new(&mut read)?;
+
+    // We know we only wrote a single array.
+    // TODO(ngates): create an option to skip the multi-array reader?
+    let mut array_reader = ipc_reader.next()?.unwrap();
+    println!("DType: {:?}", array_reader.dtype());
+    // Read some number of chunks from the stream.
+    while let Some(chunk) = array_reader.next().unwrap() {
+        println!("VIEW: {}", (&chunk as &dyn Array));
+        let taken = take(&chunk, &PrimitiveArray::from(vec![0, 1, 0, 1])).unwrap();
+        println!("Taken: {}", &taken);
+    }
+
+    Ok(())
+}

bench-vortex/src/lib.rs

@@ -13,9 +13,10 @@ use crate::taxi_data::taxi_data_parquet;
 use vortex::array::chunked::ChunkedArray;
 use vortex::array::downcast::DowncastArrayBuiltin;
 use vortex::array::IntoArray;
-use vortex::array::{Array, ArrayRef, EncodingRef, ENCODINGS};
+use vortex::array::{Array, ArrayRef};
 use vortex::arrow::FromArrowType;
 use vortex::compress::{CompressConfig, CompressCtx};
+use vortex::encoding::{EncodingRef, ENCODINGS};
 use vortex::formatter::display_tree;
 use vortex_alp::ALPEncoding;
 use vortex_datetime::DateTimeEncoding;

flatbuffers.build.rs

@@ -0,0 +1,55 @@
+use flatc::flatc;
+use std::env;
+use std::ffi::OsStr;
+use std::path::{Path, PathBuf};
+use std::process::Command;
+
+use walkdir::WalkDir;
+
+fn main() {
+    let flatbuffers_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap())
+        .canonicalize()
+        .expect("Failed to canonicalize CARGO_MANIFEST_DIR")
+        .join("flatbuffers");
+    let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap())
+        .canonicalize()
+        .expect("Failed to canonicalize OUT_DIR");
+
+    let fbs_files = WalkDir::new(&flatbuffers_dir)
+        .into_iter()
+        .filter_map(|e| e.ok())
+        .filter(|e| e.path().extension() == Some(OsStr::new("fbs")))
+        .map(|e| {
+            rerun_if_changed(e.path());
+            e.path().to_path_buf()
+        })
+        .collect::<Vec<_>>();
+
+    if !Command::new(flatc())
+        .arg("--rust")
+        .arg("--filename-suffix")
+        .arg("")
+        .arg("-I")
+        .arg(flatbuffers_dir.join("../../"))
+        .arg("--include-prefix")
+        .arg("flatbuffers::deps")
+        .arg("-o")
+        .arg(out_dir.join("flatbuffers"))
+        .args(fbs_files)
+        .status()
+        .unwrap()
+        .success()
+    {
+        panic!("Failed to run flatc");
+    }
+}
+
+fn rerun_if_changed(path: &Path) {
+    println!(
+        "cargo:rerun-if-changed={}",
+        path.canonicalize()
+            .unwrap_or_else(|_| panic!("failed to canonicalize {}", path.to_str().unwrap()))
+            .to_str()
+            .unwrap()
+    );
+}

pyvortex/src/array.rs

@@ -10,7 +10,8 @@ use vortex::array::sparse::{SparseArray, SparseEncoding};
 use vortex::array::struct_::{StructArray, StructEncoding};
 use vortex::array::varbin::{VarBinArray, VarBinEncoding};
 use vortex::array::varbinview::{VarBinViewArray, VarBinViewEncoding};
-use vortex::array::{Array, ArrayKind, ArrayRef, EncodingRef};
+use vortex::array::{Array, ArrayKind, ArrayRef};
+use vortex::encoding::EncodingRef;
 use vortex_alp::{ALPArray, ALPEncoding};
 use vortex_dict::{DictArray, DictEncoding};
 use vortex_fastlanes::{

pyvortex/src/compress.rs

@@ -1,7 +1,7 @@
 use pyo3::types::PyType;
 use pyo3::{pyclass, pyfunction, pymethods, Py, PyResult, Python};
 use std::sync::Arc;
-use vortex::array::ENCODINGS;
+use vortex::encoding::ENCODINGS;
 
 use vortex::compress::{CompressConfig, CompressCtx};
 

pyvortex/src/lib.rs

@@ -23,7 +23,7 @@ fn _lib(_py: Python, m: &PyModule) -> PyResult<()> {
 
     debug!(
         "Discovered encodings: {:?}",
-        vortex::array::ENCODINGS
+        vortex::encoding::ENCODINGS
             .iter()
             .map(|e| e.id().to_string())
             .collect::<Vec<String>>()

requirements-dev.lock

@@ -5,54 +5,104 @@
 #   pre: false
 #   features: []
 #   all-features: false
+#   with-sources: false
 
 -e file:pyvortex
 -e file:.
 babel==2.14.0
+    # via mkdocs-material
 bracex==2.4
+    # via wcmatch
 certifi==2024.2.2
+    # via requests
 charset-normalizer==3.3.2
+    # via requests
 click==8.1.7
+    # via mkdocs
 colorama==0.4.6
+    # via mkdocs-material
 ghp-import==2.1.0
+    # via mkdocs
 idna==3.6
+    # via requests
 importlib-metadata==7.0.1
+    # via mike
 importlib-resources==6.1.2
+    # via mike
 iniconfig==2.0.0
+    # via pytest
 jinja2==3.1.3
+    # via mike
+    # via mkdocs
+    # via mkdocs-material
 markdown==3.5.2
+    # via mkdocs
+    # via mkdocs-material
+    # via pymdown-extensions
 markupsafe==2.1.5
+    # via jinja2
+    # via mkdocs
 maturin==1.4.0
 mergedeep==1.3.4
+    # via mkdocs
 mike==2.0.0
 mkdocs==1.5.3
+    # via mike
+    # via mkdocs-include-markdown-plugin
+    # via mkdocs-material
 mkdocs-include-markdown-plugin==6.0.4
 mkdocs-material==9.5.12
 mkdocs-material-extensions==1.3.1
+    # via mkdocs-material
 numpy==1.26.4
+    # via pyarrow
 packaging==23.2
+    # via mkdocs
+    # via pytest
 paginate==0.5.6
+    # via mkdocs-material
 pathspec==0.12.1
+    # via mkdocs
 platformdirs==4.2.0
+    # via mkdocs
 pluggy==1.4.0
+    # via pytest
 py-cpuinfo==9.0.0
+    # via pytest-benchmark
 pyarrow==15.0.0
 pygments==2.17.2
+    # via mkdocs-material
 pymdown-extensions==10.7
+    # via mkdocs-material
 pyparsing==3.1.1
+    # via mike
 pytest==7.4.0
+    # via pytest-benchmark
 pytest-benchmark==4.0.0
 python-dateutil==2.9.0
+    # via ghp-import
 pyyaml==6.0.1
+    # via mike
+    # via mkdocs
+    # via pymdown-extensions
+    # via pyyaml-env-tag
 pyyaml-env-tag==0.1
+    # via mkdocs
 regex==2023.12.25
+    # via mkdocs-material
 requests==2.31.0
+    # via mkdocs-material
 ruff==0.2.2
 six==1.16.0
+    # via python-dateutil
 urllib3==2.2.1
+    # via requests
 verspec==0.1.0
+    # via mike
 watchdog==4.0.0
+    # via mkdocs
 wcmatch==8.5.1
+    # via mkdocs-include-markdown-plugin
 zipp==3.17.0
-# The following packages are considered to be unsafe in a requirements file:
+    # via importlib-metadata
 pip==24.0

requirements.lock

@@ -5,6 +5,7 @@
 #   pre: false
 #   features: []
 #   all-features: false
+#   with-sources: false
 
 -e file:pyvortex
 -e file:.

vortex-alp/src/array.rs

@@ -1,12 +1,14 @@
 use std::sync::{Arc, RwLock};
 
-use vortex::array::{Array, ArrayKind, ArrayRef, Encoding, EncodingId, EncodingRef};
+use vortex::array::{Array, ArrayKind, ArrayRef};
 use vortex::compress::EncodingCompression;
+use vortex::compute::ArrayCompute;
+use vortex::encoding::{Encoding, EncodingId, EncodingRef};
 use vortex::formatter::{ArrayDisplay, ArrayFormatter};
-use vortex::impl_array;
 use vortex::serde::{ArraySerde, EncodingSerde};
 use vortex::stats::{Stats, StatsSet};
 use vortex::validity::{ArrayValidity, Validity};
+use vortex::{impl_array, ArrayWalker};
 use vortex_error::{vortex_bail, vortex_err, VortexResult};
 use vortex_schema::{DType, IntWidth, Signedness};
 
@@ -115,6 +117,10 @@ impl Array for ALPArray {
     fn serde(&self) -> Option<&dyn ArraySerde> {
         Some(self)
     }
+
+    fn walk(&self, walker: &mut dyn ArrayWalker) -> VortexResult<()> {
+        walker.visit_child(self.encoded())
+    }
 }
 
 impl ArrayDisplay for ALPArray {

vortex-alp/src/lib.rs

@@ -2,7 +2,7 @@ pub use alp::*;
 pub use array::*;
 
 use linkme::distributed_slice;
-use vortex::array::{EncodingRef, ENCODINGS};
+use vortex::encoding::{EncodingRef, ENCODINGS};
 
 mod alp;
 mod array;

vortex-alp/src/serde.rs

@@ -13,6 +13,10 @@ impl ArraySerde for ALPArray {
         ctx.write_fixed_slice([self.exponents().e, self.exponents().f])?;
         ctx.write(self.encoded())
     }
+
+    fn metadata(&self) -> VortexResult<Option<Vec<u8>>> {
+        Ok(Some(vec![self.exponents().e, self.exponents().f]))
+    }
 }
 
 impl EncodingSerde for ALPEncoding {