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Load parquet and json files (#3437)
* Load parquet and json files * changed csv file error
This commit is contained in:
Fernando Herrera
GitHub
parent
0612e5ccfb
commit
d0229cb96e
155
Cargo.lock
generated
155
Cargo.lock
generated
@ -120,6 +120,21 @@ dependencies = [
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"memchr",
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]
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[[package]]
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name = "alloc-no-stdlib"
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version = "2.0.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5192ec435945d87bc2f70992b4d818154b5feede43c09fb7592146374eac90a6"
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[[package]]
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name = "alloc-stdlib"
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version = "0.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "697ed7edc0f1711de49ce108c541623a0af97c6c60b2f6e2b65229847ac843c2"
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dependencies = [
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"alloc-no-stdlib",
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]
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[[package]]
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name = "ansi_colours"
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version = "1.0.2"
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@ -427,6 +442,12 @@ dependencies = [
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"safemem 0.3.3",
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]
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[[package]]
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name = "base64"
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version = "0.12.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3441f0f7b02788e948e47f457ca01f1d7e6d92c693bc132c22b087d3141c03ff"
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[[package]]
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name = "base64"
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version = "0.13.0"
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@ -553,6 +574,27 @@ dependencies = [
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"once_cell",
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]
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[[package]]
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name = "brotli"
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version = "3.3.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7f29919120f08613aadcd4383764e00526fc9f18b6c0895814faeed0dd78613e"
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dependencies = [
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"alloc-no-stdlib",
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"alloc-stdlib",
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"brotli-decompressor",
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]
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[[package]]
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name = "brotli-decompressor"
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version = "2.3.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1052e1c3b8d4d80eb84a8b94f0a1498797b5fb96314c001156a1c761940ef4ec"
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dependencies = [
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"alloc-no-stdlib",
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"alloc-stdlib",
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]
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[[package]]
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name = "bson"
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version = "0.14.1"
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@ -2603,6 +2645,12 @@ dependencies = [
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"cfg-if 1.0.0",
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]
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[[package]]
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name = "integer-encoding"
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version = "1.1.7"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "48dc51180a9b377fd75814d0cc02199c20f8e99433d6762f650d39cdbbd3b56f"
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[[package]]
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name = "iovec"
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version = "0.1.4"
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@ -2883,6 +2931,26 @@ dependencies = [
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"value-bag",
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]
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[[package]]
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name = "lz4"
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version = "1.23.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "aac20ed6991e01bf6a2e68cc73df2b389707403662a8ba89f68511fb340f724c"
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dependencies = [
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"libc",
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"lz4-sys",
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]
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[[package]]
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name = "lz4-sys"
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version = "1.9.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "dca79aa95d8b3226213ad454d328369853be3a1382d89532a854f4d69640acae"
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dependencies = [
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"cc",
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"libc",
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]
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[[package]]
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name = "mac"
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version = "0.1.1"
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@ -4387,6 +4455,34 @@ dependencies = [
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"winapi 0.3.9",
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]
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[[package]]
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name = "parquet"
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version = "4.0.0-SNAPSHOT"
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source = "git+https://github.com/apache/arrow-rs?rev=d008f31b107c1030a1f5144c164e8ca8bf543576#d008f31b107c1030a1f5144c164e8ca8bf543576"
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dependencies = [
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"arrow",
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"base64 0.12.3",
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"brotli",
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"byteorder",
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"chrono",
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"flate2",
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"lz4",
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"num-bigint 0.3.2",
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"parquet-format",
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"snap",
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"thrift",
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"zstd",
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]
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[[package]]
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name = "parquet-format"
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version = "2.6.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a5bc6b23543b5dedc8f6cce50758a35e5582e148e0cfa26bd0cacd569cda5b71"
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dependencies = [
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"thrift",
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]
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[[package]]
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name = "parse-zoneinfo"
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version = "0.3.0"
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@ -4632,6 +4728,7 @@ dependencies = [
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"lazy_static 1.4.0",
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"num 0.4.0",
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"num_cpus",
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"parquet",
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"polars-arrow",
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"prettytable-rs",
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"rayon",
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@ -4656,6 +4753,7 @@ dependencies = [
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"memmap2",
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"num 0.4.0",
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"num_cpus",
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"parquet",
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"polars-arrow",
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"polars-core",
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"rayon",
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@ -5865,6 +5963,12 @@ dependencies = [
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"syn 1.0.71",
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]
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[[package]]
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name = "snap"
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version = "1.0.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "45456094d1983e2ee2a18fdfebce3189fa451699d0502cb8e3b49dba5ba41451"
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[[package]]
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name = "socket2"
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version = "0.3.19"
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@ -6297,6 +6401,28 @@ dependencies = [
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"lazy_static 1.4.0",
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]
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[[package]]
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name = "threadpool"
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version = "1.8.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d050e60b33d41c19108b32cea32164033a9013fe3b46cbd4457559bfbf77afaa"
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dependencies = [
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"num_cpus",
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]
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[[package]]
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name = "thrift"
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version = "0.13.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0c6d965454947cc7266d22716ebfd07b18d84ebaf35eec558586bbb2a8cb6b5b"
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dependencies = [
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"byteorder",
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"integer-encoding",
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"log 0.4.14",
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"ordered-float",
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"threadpool",
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]
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[[package]]
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name = "tiff"
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version = "0.6.1"
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@ -7298,3 +7424,32 @@ dependencies = [
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"thiserror",
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"time 0.1.44",
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]
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[[package]]
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name = "zstd"
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version = "0.7.0+zstd.1.4.9"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9428752481d8372e15b1bf779ea518a179ad6c771cca2d2c60e4fbff3cc2cd52"
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dependencies = [
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"zstd-safe",
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]
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[[package]]
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name = "zstd-safe"
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version = "3.1.0+zstd.1.4.9"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5aa1926623ad7fe406e090555387daf73db555b948134b4d73eac5eb08fb666d"
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dependencies = [
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"libc",
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"zstd-sys",
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]
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[[package]]
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name = "zstd-sys"
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version = "1.5.0+zstd.1.4.9"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4e6c094340240369025fc6b731b054ee2a834328fa584310ac96aa4baebdc465"
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dependencies = [
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"cc",
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"libc",
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]
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@ -99,7 +99,12 @@ uuid_crate = { package = "uuid", version = "0.8.2", features = ["v4"], optional
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which = { version = "4.1.0", optional = true }
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zip = { version = "0.5.9", optional = true }
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polars = {version="0.13.1", git = "https://github.com/ritchie46/polars", rev = "3efad9a5c380c64a5eb78b4b7ad257e1e606b9f0", optional = true}
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[dependencies.polars]
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version = "0.13.1"
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git = "https://github.com/ritchie46/polars"
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rev = "3efad9a5c380c64a5eb78b4b7ad257e1e606b9f0"
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optional = true
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features = ["parquet", "json"]
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[target.'cfg(unix)'.dependencies]
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umask = "1.0.0"
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@ -1,12 +1,15 @@
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use std::path::PathBuf;
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use crate::prelude::*;
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use nu_engine::WholeStreamCommand;
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use nu_engine::{EvaluatedCommandArgs, WholeStreamCommand};
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use nu_errors::ShellError;
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use nu_protocol::{dataframe::NuDataFrame, Signature, SyntaxShape, UntaggedValue};
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use nu_protocol::{
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dataframe::NuDataFrame, Primitive, Signature, SyntaxShape, UntaggedValue, Value,
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};
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use nu_source::Tagged;
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use polars::prelude::{CsvReader, SerReader};
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use polars::prelude::{CsvReader, JsonReader, ParquetReader, SerReader};
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use std::fs::File;
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pub struct Dataframe;
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@ -16,15 +19,45 @@ impl WholeStreamCommand for Dataframe {
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}
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fn usage(&self) -> &str {
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"Loads dataframe form csv or parquet file"
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"Loads dataframe form csv file"
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}
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fn signature(&self) -> Signature {
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Signature::build("dataframe load").required(
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"file",
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SyntaxShape::FilePath,
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"the file path to load values from",
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)
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Signature::build("dataframe load")
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.required(
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"file",
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SyntaxShape::FilePath,
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"the file path to load values from",
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)
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.named(
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"delimiter",
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SyntaxShape::String,
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"file delimiter character. CSV file",
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Some('d'),
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)
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.switch(
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"no_header",
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"Indicates if file doesn't have header. CSV file",
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None,
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)
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.named(
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"infer_schema",
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SyntaxShape::Number,
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"Set number of row to infer the schema of the file. CSV file",
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None,
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)
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.named(
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"skip_rows",
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SyntaxShape::Number,
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"Number of rows to skip from file. CSV file",
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None,
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)
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.named(
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"columns",
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SyntaxShape::Table,
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"Columns to be selected from csv file. CSV file",
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None,
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)
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}
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fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
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@ -45,33 +78,23 @@ fn create_from_file(args: CommandArgs) -> Result<OutputStream, ShellError> {
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let args = args.evaluate_once()?;
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let file: Tagged<PathBuf> = args.req(0)?;
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// Needs more detail and arguments while loading the dataframe
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// Options:
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// - has header
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// - infer schema
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// - delimiter
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// - csv or parquet <- extracted from extension
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let csv_reader = match CsvReader::from_path(&file.item) {
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Ok(csv_reader) => csv_reader,
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Err(e) => {
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return Err(ShellError::labeled_error(
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"Unable to parse file",
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format!("{}", e),
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let df = match file.item().extension() {
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Some(e) => match e.to_str() {
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Some("csv") => from_csv(args),
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Some("parquet") => from_parquet(args),
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Some("json") => from_json(args),
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_ => Err(ShellError::labeled_error(
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"Error with file",
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"Not a csv or parquet file",
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&file.tag,
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))
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}
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};
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let df = match csv_reader.infer_schema(None).has_header(true).finish() {
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Ok(csv_reader) => csv_reader,
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Err(e) => {
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return Err(ShellError::labeled_error(
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"Error while parsing dataframe",
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format!("{}", e),
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&file.tag,
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))
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}
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};
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)),
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},
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None => Err(ShellError::labeled_error(
|
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"Error with file",
|
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"File without extension",
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&file.tag,
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)),
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}?;
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let file_name = match file.item.into_os_string().into_string() {
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Ok(name) => name,
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@ -93,3 +116,105 @@ fn create_from_file(args: CommandArgs) -> Result<OutputStream, ShellError> {
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Ok(init.to_output_stream())
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}
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fn from_parquet(args: EvaluatedCommandArgs) -> Result<polars::prelude::DataFrame, ShellError> {
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let file: Tagged<PathBuf> = args.req(0)?;
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let r = File::open(&file.item)
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.map_err(|e| ShellError::labeled_error("Error with file", format!("{:?}", e), &file.tag))?;
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let reader = ParquetReader::new(r);
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reader
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.finish()
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.map_err(|e| ShellError::labeled_error("Error with file", format!("{:?}", e), &file.tag))
|
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}
|
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|
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fn from_json(args: EvaluatedCommandArgs) -> Result<polars::prelude::DataFrame, ShellError> {
|
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let file: Tagged<PathBuf> = args.req(0)?;
|
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|
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let r = File::open(&file.item)
|
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.map_err(|e| ShellError::labeled_error("Error with file", format!("{:?}", e), &file.tag))?;
|
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|
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let reader = JsonReader::new(r);
|
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|
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reader
|
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.finish()
|
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.map_err(|e| ShellError::labeled_error("Error with file", format!("{:?}", e), &file.tag))
|
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}
|
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|
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fn from_csv(args: EvaluatedCommandArgs) -> Result<polars::prelude::DataFrame, ShellError> {
|
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let file: Tagged<PathBuf> = args.req(0)?;
|
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let delimiter: Option<Tagged<String>> = args.get_flag("delimiter")?;
|
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let no_header: bool = args.has_flag("no_header");
|
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let infer_schema: Option<Tagged<usize>> = args.get_flag("infer_schema")?;
|
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let skip_rows: Option<Tagged<usize>> = args.get_flag("skip_rows")?;
|
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let columns: Option<Vec<Value>> = args.get_flag("columns")?;
|
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|
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let csv_reader = CsvReader::from_path(&file.item).map_err(|e| {
|
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ShellError::labeled_error("Unable to parse file", format!("{}", e), &file.tag)
|
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})?;
|
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|
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let csv_reader = match delimiter {
|
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None => csv_reader,
|
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Some(d) => {
|
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if d.item.len() != 1 {
|
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return Err(ShellError::labeled_error(
|
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"Incorrect delimiter",
|
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"Delimiter has to be one char",
|
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&d.tag,
|
||||
));
|
||||
} else {
|
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let delimiter = match d.item.chars().nth(0) {
|
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Some(d) => d as u8,
|
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None => unreachable!(),
|
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};
|
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csv_reader.with_delimiter(delimiter)
|
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}
|
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}
|
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};
|
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|
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let csv_reader = if no_header {
|
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csv_reader.has_header(false)
|
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} else {
|
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csv_reader.has_header(true)
|
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};
|
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|
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let csv_reader = match infer_schema {
|
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None => csv_reader.infer_schema(None),
|
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Some(r) => csv_reader.infer_schema(Some(r.item)),
|
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};
|
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|
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let csv_reader = match skip_rows {
|
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None => csv_reader,
|
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Some(r) => csv_reader.with_skip_rows(r.item),
|
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};
|
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|
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let csv_reader = match columns {
|
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None => csv_reader,
|
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Some(c) => {
|
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let columns = c
|
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.into_iter()
|
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.map(|value| match value.value {
|
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UntaggedValue::Primitive(Primitive::String(s)) => Ok(s),
|
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_ => Err(ShellError::labeled_error(
|
||||
"Incorrect type for column",
|
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"Only string as columns",
|
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&value.tag,
|
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)),
|
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})
|
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.collect::<Result<Vec<String>, ShellError>>();
|
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|
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csv_reader.with_columns(Some(columns?))
|
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}
|
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};
|
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|
||||
match csv_reader.finish() {
|
||||
Ok(csv_reader) => Ok(csv_reader),
|
||||
Err(e) => Err(ShellError::labeled_error(
|
||||
"Error while parsing dataframe",
|
||||
format!("{}", e),
|
||||
&file.tag,
|
||||
)),
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user