Lib.rs

Cargo Features

[dependencies]
polars-io = { version = "0.45.1", default-features = false, features = ["json", "serde", "ipc", "ipc_streaming", "avro", "csv", "decompress", "decompress-fast", "dtype-u8", "dtype-u16", "dtype-i8", "dtype-i16", "dtype-categorical", "dtype-date", "object", "dtype-datetime", "timezones", "dtype-time", "dtype-struct", "dtype-decimal", "fmt", "lazy", "parquet", "async", "cloud", "file_cache", "aws", "azure", "gcp", "http", "temporal", "simd", "python"] }

default = decompress

The decompress feature is set by default whenever polars-io is added without default-features = false somewhere in the dependency tree.

json = atoi_simd, csv, dtype-struct, polars-json, simd-json

support for arrows json parsing

Affects polars-io::json, polars-io::ndjson, other::overwrite_schema, polars-io::csv…

serde cloud?

Enables serde, serde-lazy of polars-core, serde of polars-parquet and polars-utils

ipc

support for arrows ipc file parsing

Enables io_ipc and io_ipc_compression of polars-arrow

Affects polars-io::ipc, predicates::apply_predicate, other::apply_projection, other::columns_to_projection…

ipc_streaming

support for arrows streaming ipc file parsing

Enables io_ipc and io_ipc_compression of polars-arrow

Affects polars-io::ipc, other::apply_projection, other::columns_to_projection…

avro

support for arrow avro parsing

Enables io_avro and io_avro_compression of polars-arrow

Affects polars-io::avro, other::apply_projection, other::columns_to_projection…

csv json? = atoi_simd, fast-float2, itoa, ryu, simdutf8

Enables rows of polars-core

polars-core:

opt-in features
create from row values
and include pivot operation

Affects polars-io::csv…

decompress default = zstd

Enables rust_backend of flate2

decompress-fast = zstd

Enables zlib-ng of flate2

dtype-u8

Enables dtype-u8 of polars-core

dtype-u16

Enables dtype-u16 of polars-core

dtype-i8

Enables dtype-i8 of polars-core

dtype-i16

Enables dtype-i16 of polars-core

dtype-categorical

Enables dtype-categorical of polars-core

Affects buffer::CategoricalField…

dtype-date temporal?

Enables dtype-date of polars-core and polars-time

polars-core:

opt-in datatypes for Series

Affects buffer::DatetimeField…

object

Enables object of polars-core

polars-core:

support for ObjectChunked<T> (downcastable Series of any type)

dtype-datetime temporal? timezones? = chrono

Enables dtype-datetime and temporal of polars-core, dtype-datetime of polars-time

Affects buffer::DatetimeField…

timezones = chrono-tz, dtype-datetime

Enables chrono-tz and timezones of optional polars-json and timezones of polars-arrow

polars-arrow:

polars-arrow

dtype-time temporal?

Enables dtype-time and temporal of polars-core, dtype-time of polars-time

dtype-struct json?

Enables dtype-struct of polars-core

dtype-decimal

Enables dtype-decimal of polars-core and optional polars-json

fmt

Enables fmt of polars-core

lazy

parquet = polars-parquet

Enables partition_by of polars-core, compression of polars-parquet

Affects polars-io::parquet, polars-io::partition, predicates::apply_predicate, other::apply_projection, other::columns_to_projection…

async cloud? file_cache? = async-trait, futures, tokio, tokio-util

Enables regex of polars-error, async of optional polars-parquet

Affects polars-io::pl_async, read_impl::BatchedParquetIter…

cloud aws? azure? file_cache? gcp? http? = async, file_cache, http, object_store, reqwest, serde, serde_json, url

Enables object_store of polars-error

Affects cloud::credential_provider, reader::ParquetAsyncReader, utils::byte_source…

file_cache cloud? = async, cloud, serde_json

Enables blake3 and fs4

Affects options::CloudOptions.file_cache_ttl, polars-io::file_cache…

aws = cloud, reqwest

Enables aws of object_store

Affects credential_provider::IntoCredentialProvider.into_aws_provider…

azure = cloud

Enables azure of object_store

Affects credential_provider::IntoCredentialProvider.into_azure_provider…

gcp = cloud

Enables gcp of object_store

Affects credential_provider::IntoCredentialProvider.into_gcp_provider…

http cloud? = cloud

Enables http of object_store

temporal = dtype-date, dtype-datetime, dtype-time

simd

python = pyo3

Enables python of polars-error and polars-utils

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

polars-json json?

polars-parquet parquet? serde?

polars-time dtype-date? dtype-datetime? dtype-time?

async-trait async?

atoi_simd csv? json?

chrono dtype-datetime?

chrono-tz timezones?

fast-float2 csv?

flate2 decompress decompress-fast?

futures async?

itoa csv?

object_store aws? azure? cloud? gcp? http?

pyo3 python?

Enables pyo3 ^0.22

reqwest aws? cloud?

ryu csv?

serde_json cloud? file_cache?

simd-json json?

simdutf8 csv?

tokio async?

tokio-util async?

url cloud?

zstd decompress decompress-fast?